C. Nicolaides

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Prediction of Nonclassical Hydrogen Complexes of Nontransition Metals

C. Nicolaides, E. Simandiras, 1996 .

Prediction of non-transition-metal hydrogen complexes

C. Nicolaides, E. Simandiras, 1992 .

Delay in Photoemission

J Burgdörfer, U. Kleineberg, N. Karpowicz, 2010, Science.

Unstable states in the continuous spectra

E. Brändas, J. Sabin, C. Nicolaides, 2010 .

Quantum chemistry on the time axis: electron correlations and rearrangements on femtosecond and attosecond scales

C. Nicolaides, 2015, 1506.02834.

Stability and physicochemical reactions of light dications

M. Chrysos, C. Nicolaides, P. Valtazanos, 1990 .

The slowly convergent s-d perturbation series for hydrogen in a magnetic field

C. Nicolaides, H. Schmidt, 1989 .

Excitation of superpositions of resonances by two time-delayed ultrafast pulses: Multistate semianalytic formalism and application to inner-hole states of carbon at the K absorption edge

C. Nicolaides, Y. Komninos, T. Mercouris, 2020 .

An estimate of the lifetime of excited tetrahydrogen

A. Metropoulos, I. Petsalakis, G. Theodorakopoulos, 1989 .

Theory and calculation of resonances using complex coordinates

C. Nicolaides, Y. Komninos, T. Mercouris, 2009 .

Many-electron theory of autoionizing states using complex coordinates: The position and the partial and total widths of the Ne+ 1s hole state

C. Nicolaides, Y. Komninos, T. Mercouris, 1984 .

Theory and calculation of excited‐state wave functions and properties

C. Nicolaides, D. Beck, 2009 .

Attosecond-Resolved Electron Dynamics in Many-Electron Atoms: Quantitative Theory and Comparison with Measurements

C. Nicolaides, 2018 .

Fractal singularities and the rate of multiphoton dissociation

V. Constantoudis, C. Nicolaides, 2002 .

The State-Specific Expansion Approach to the Solution of the Polyelectronic Time-Dependent Schrödinger Equation for Atoms and Molecules in Unstable States

C. Nicolaides, Y. Komninos, T. Mercouris, 2010 .

Short- and long-range binding of Be with Mg in the X1Σ+ ground state and in the A1Π excited state.

Ioannis S. K. Kerkines, C. Nicolaides, 2012, The Journal of chemical physics.

Adiabatic calculations of the 2Σ+g excited states of He+2

A. Metropoulos, R. Buenker, C. Nicolaides, 1987 .

Theory and computation of the rate of multiphoton two-electron ionization via the direct mechanism

C. Nicolaides, T. Mercouris, Costas Haritos, 2001 .

He in dichromatic weak or strong ac fields ofλ1=248nmandλ2=(1/m)248 nm(m=2,3,4)

C. Nicolaides, T. Mercouris, 2000 .

Efficient Laf3-Nd3+-Based Vacuum-Ultraviolet Laser at 172 Nm

A. Cefalas, E. Sarantopoulou, S. Korableva, 1992 .

VUV and UV fluorescence and absorption studies of Pr(3+)-doped LiLuF(4) single crystals.

E. Sarantopoulou, S. Korableva, V. Semashko, 1994, Optics letters.

Resonances in the continuum, field induced nonstationary states, and the state and property specific treatment of the many electron problem

C. Nicolaides, 2016, 1603.03630.

Excimer laser induced photoablation of charge-transfer thin film materials

E. Kamitsos, A. Cefalas, C. Nicolaides, 1988 .

Potential energy surfaces for the photodissociation H2O→O(1Dg + H2(X1Σ+g)

S. Peyerimhoff, R. Buenker, G. Theodorakopoulos, 1982 .

Picosecond phase-conjugation by degenerate four-wave mixing in sodium vapour

P. Simon, T. Mikropoulos, A. Cefalas, 1988 .

Electronic structure and the mechanism of autoionization for doubly excited states

N. Makri, C. Nicolaides, Y. Komninos, 1986 .

Discrete-resonance-resonance transitions induced by two laser pulses with an ultrashort time delay: A formal analytic solution and quantitative applications

C. Nicolaides, Y. Komninos, T. Mercouris, 2018, Physical Review A.

Nonstationary states and the many-electron problem

C. Nicolaides, 2017 .

Quantum chemistry and its “ages”

C. Nicolaides, 2014 .

Time-dependent tunnelling via path integrals. Connection to results of the quantum mechanics of decaying states

C. Nicolaides, Theodosios G. Douvropoulos, Theodosios G Douvropoulos, 2002 .

Time asymmetry, nonexponential decay, and complex eigenvalues in the theory and computation of resonance states

C. Nicolaides, 2002 .

LETTER TO THE EDITOR: Theory and computation of the profile of the free - free transition probability between autoionizing (resonant) states

C. Nicolaides, Y. Komninos, 1997 .

The state-specific approach to the solution of problems of electronic structure and dynamics involving excited states

C. Nicolaides, 1996 .

Theory and computation of perturbed spectra: application to the Al 2D relativistic spectrum

C. Nicolaides, Y. Komninos, G. Aspromallis, 1995 .

Many‐Electron, many‐photon theory of nonstationary states

I. Petsalakis, C. Nicolaides, Y. Komninos, 1994 .

Laser ionisation of H- in the presence of a DC field

C. Nicolaides, T. Mercouris, 1990 .

Predissociation resonances from the complex eigenvalue Schrodinger equation

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1990 .

Many-Electron, Many-Photon Theory of Atoms in Strong Fields

C. Nicolaides, T. Mercouris, 1990 .

Properties of Multiply Excited States

M. Chrysos, C. Nicolaides, Y. Komninos, 1990 .

The Wannier two-electron ionisation ladder in many electron systems: the He 1Po doubly excited states

C. Nicolaides, Y. Komninos, 1986 .

Anomalies in the Fine and Hyperfine Structure of Alkali Isoelectronic Sequences

C. Nicolaides, D. Beck, 1976 .

Theory of chemical reactions of vibronically excited H2 (B 1Σ+u). III. Formation of bound excited states of the (H2)2, (H2)3, and (H2)5 clusters

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1984 .

Solid state LaF3: Nd3+ vuv laser pumped by a pulsed discharge F2-molecular laser at 157 nm

A. Cefalas, M. Dubinskii, C. Nicolaides, 1992 .

The OBeH2 hypersurface: Local and global minima, transition states, and reaction paths

C. Nicolaides, P. Valtazanos, 1993 .

Adiabatic and quasidiabatic 2Σ+ states of BeH

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1992 .

Molecules with “Volcanic” Ground Hypersurfaces. Structure, Stability and Energetics.

C. Nicolaides, P. Valtazanos, 1991 .

Inversion of molecular spectra by solid environments

C. Nicolaides, P. Valtazanos, 1990 .

Theory and computation of electromagnetic transition matrix elements in the continuous spectrum of atoms

C. Nicolaides, Y. Komninos, T. Mercouris, 2014, 1412.5015.

Vacuum ultraviolet and ultraviolet fluorescence and absorption studies of Er3+‐doped LiLuF4 single crystals

Z. Kollia, E. Sarantopoulou, S. Korableva, 1994 .

VUV and UV fluorescence and absorption studies of Nd3+ and Ho3+ ions in LiYF4 single crystals

E. Sarantopoulou, S. Korableva, V. Semashko, 1994 .

VUV and UV fluorescence and absorption studies of Tb3+ and Tm3+ trivalent ions in LiYF4 single crystal hosts

Z. Kollia, A. Cefalas, E. Sarantopoulou, 1994 .

Theory of Atomic and Molecular Non-Stationary States Within the Coordinate Rotation Method

C. Nicolaides, D. Beck, 1978 .

Interaction of argon with the Al(100) surface

A. N. Andriotis, C. Nicolaides, A. Andriotis, 1984 .

State‐ and property‐specific quantum chemistry: Basic characteristics, and sample applications to atomic, molecular, and metallic ground and excited states of beryllium

C. Nicolaides, 2011 .

State-Specific Theory of Electron Correlation in Excited States

C. Nicolaides, 1984 .

Observation and theoretical analysis of the odd J=3 autoionising spectrum of Sr up to the 4d threshold

M. Kompitsas, S. Cohen, C. Nicolaides, 1990 .

Inner electron binding energies and Auger energies in free atoms for use in X-ray spectroscopy

C. Nicolaides, D. Beck, 1976 .

Complex energies and the polyelectronic Stark problem

C. Nicolaides, S. Themelis, 2000 .

Solution of the complex eigenvalue Schrödinger equation for the rydberg series of inner hole excited autoionizing states. The Be 1s 2s2n p (n=2–5)3P0 and1P0 series

C. Nicolaides, T. Mercouris, 1987 .

Theory and ab initio calculation of partial widths and interchannel coupling in predissociating diatomic states: application to HeF

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1991 .

Multiphoton ionization of negative ions in the presence of a dc FIELD. Application to Li

C. Nicolaides, T. Mercouris, 1989 .

Complex Stark eigenvalues via analytic continuation of real high-order perturbation series

C. Nicolaides, J. Silverman, 1988 .

Localised and asymptotic electron correlation in autoionising states in terms of complex coordinates

C. Nicolaides, T. Mercouris, 1984 .

Calculations of induced moments in large molecules I. Polarizabilities and second hyperpolarizabilities in some alkanes

M. Papadopoulos, C. Nicolaides, J. Waite, 1982 .

Non-orthonormal basis calculations of the dipole transition moment for the phillips system (A 1Πu → X 1Σ+g) in C2. Theoretical lifetime of the A 1Πu state

R. Buenker, I. Petsalakis, G. Theodorakopoulos, 1987 .

Time dependence and properties of nonstationary states in the continuous spectrum of atoms

C. Nicolaides, T. Mercouris, 1997 .

On the violation of the exponential decay law in atomic physics: ab initio calculation of the time-dependence of the non-stationary state

C. Nicolaides, T. Mercouris, 1996 .

On the calculation of the complex energies of resonances

C. Nicolaides, H. Gotsis, 1992 .

Nonperturbative multiphoton detachment rates of H- and their relation to the electronic structure of the initial state

C. Nicolaides, T. Mercouris, Costas Haritos, 2000 .

Quantum defect theory for Coulomb and other potentials in the framework of configuration interaction and implementation to the calculation of 2 D and 2 F o perturbed spectra of Al

C. Nicolaides, Y. Komninos, 2004 .

Wavefunctions and autoionisation of doubly excited states in momentum space

N. Makri, C. Nicolaides, Y. Komninos, 1987 .

Diabatic potentials for the 1 1A″ and 2 1A″ states of H2S

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1993 .

Bound excited states of atomic negative ions

C. Nicolaides, D. Beck, G. Aspromallis, 1989 .

The two-electron ionisation ladder for He- 2S and H- 1S

M. Chrysos, C. Nicolaides, Y. Komninos, 1987 .

Bound-States and Decay Mechanisms of He

C. Nicolaides, Y. Komninos, D. Beck, 1981 .

Possibility for VUV and x-ray tunable atomic lasers

C. Nicolaides, Y. Komninos, 1981 .

How many bound states do H− and H2− have?

C. Nicolaides, D. Beck, 1978 .

Electronic structure and oscillator strengths of highly excited states: Resonances in He−, Li, and Be

C. Nicolaides, D. Beck, 1977 .

ON THE APPLICATION OF CONVENTIONAL QUANTUM CHEMISTRY METHODS OF COMPUTATION TO STATES PERTURBED BY THE CONTINUOUS SPECTRUM

C. Nicolaides, 1999 .

LETTER TO THE EDITOR: The significance of electron correlation and of state symmetries in the interaction of strong laser pulses of 5 eV with He

C. Nicolaides, T. Mercouris, Stavroula Dionissopoulou, 1998 .

Relativistic autoionisation of bound states of negative ions: Be-

C. Nicolaides, D. Beck, G. Aspromallis, 1986 .

Multi-channel reaction matrix theory and configuration-interaction in the discrete and in the continuous spectrum. Inclusion of closed channels and derivation of quantum defect theory

C. Nicolaides, Y. Komninos, 1987 .

On the theoretical interpretation and calculation of inner-electron photoemission spectra in atoms and solids

C. Nicolaides, D. Beck, 2009 .

Theory and Computation of Nonstationary States of Polyelectronic Atoms and Molecules

C. Nicolaides, 1992 .

Vacuum-ultraviolet interconfigurational 4f 3 → 4f 2 5d absorption and emission studies of the Nd 3+ ion in KYF, YF, and YLF crystal hosts

Z. Kollia, E. Sarantopoulou, S. Korableva, 1995 .

Calculations of induced moments in large molecules. II. Polarizabilities and second hyperpolarizabilities of some polyenes

Manthos G. Papadopoulos, M. Papadopoulos, C. Nicolaides, 1982 .

Theoretical dipole transition moments for transitions between bound electronic states and non-adiabatic coupling matrix elements between 2Σ+ of HeH

R. Buenker, I. Petsalakis, G. Theodorakopoulos, 1987 .

Theoretical dipole transition moments for the transitions to the ground state X2σ+ from the A2σ+, B2Π, C2σ+, D2σ+ and E2Π states and for the B 2?A 2:+ system in HeH

R. Buenker, I. Petsalakis, G. Theodorakopoulos, 1987 .

A non-van der Waals minimum of the He(1S) + H2(B 1Σu+) excited surface

G. Theodorakopoulos, C. Nicolaides, S. Farantos, 1983 .

Theory for the direct construction of diabatic states and application to the He+22Σ+g spectrum

N. Bacalis, C. Nicolaides, Y. Komninos, 1992 .

Nonorthonormal CI for molecular excited states. I. The sudden polarization effect in 90° twisted ethylene

Robert J. Buenker, Cleanthes A. Nicolaides, Sigrid D. Peyerimhoff, 1984 .

Non‐orthonormal CI for molecular excited states. II. The zwitterionic states of terminally twisted butadiene

R. Buenker, I. Petsalakis, G. Theodorakopoulos, 1984 .

Time dependence, complex scaling, and the calculation of resonances in many‐electron systems

C. Nicolaides, D. Beck, 1978 .

Toward the understanding of He2− excited states

N. Bacalis, C. Nicolaides, Y. Komninos, 1995 .

Energy generation from volcanic ground states. Application to cold He22

Cleanthes A. Nicolaides, C. Nicolaides, 1989 .

Theoretical oscillator strengths for the NI and OI resonance transitions

C. Nicolaides, D. Beck, 1976 .

Superfluorescent laser action around 495 nm in the blue-green band of the mercury trimer Hg3

Constantine Skordoulis, C. Nicolaides, A. Cefalas, 1986 .

Electric Quadrupole Transition-Probabilities for the Lowest 1d Metastable State in Ca and Sr

C. Nicolaides, D. Beck, 1983 .

Chapter 4 – Theory and State-Specific Methods for the Analysis and Computation of Field-Free and Field-Induced Unstable States in Atoms and Molecules

C. Nicolaides, 2010 .

LETTER TO THE EDITOR: The H?? spectrum has at least two resonance states

C. Nicolaides, M. Bylicki, 1998 .

Theoretical resolution of the H- resonance spectrum up to the n=5 threshold: States of 3Po symmetry

C. Nicolaides, M. Bylicki, 2001 .

Theoretical resolution of the H - resonance spectrum up to the n=4 threshold. I. States of 1 P o , 1 D o , and 1 F o symmetries

C. Nicolaides, M. Bylicki, 2000 .

Theoretical resolution of the H − resonance spectrum up to the n = 4 threshold. II. States of 1 S and 1 D symmetries

C. Nicolaides, M. Bylicki, 2000 .

Energies, widths and spectral features of the 3Pe resonances of H-

C. Nicolaides, M. Bylicki, 2000 .

LETTER TO THE EDITOR: Even-parity 1P resonances of H- up to the n = 5 threshold

C. Nicolaides, M. Bylicki, 1999 .

Electron correlation and relativistic effects on the energies and widths of doubly excited states of He

C. Nicolaides, Y. Komninos, G. Aspromallis, 1984 .

Decay Modes and Lifetimes of Doubly Excited States in He

C. Nicolaides, Y. Komninos, 1983 .

Partial widths of the resonances of the H- 1P0 two-electron ionization ladder

M. Chrysos, C. Nicolaides, Y. Komninos, 1992 .

Computation of the widths of doubly excited states coupled by external AC or DC fields

C. Nicolaides, T. Mercouris, 1991 .

Theory of the Electronic Structure of Excited States in Small Systems with Numerical Applications to Atomic States

C. Nicolaides, D. Beck, 1978 .

Radiative autoionization - A proposal for the construction of short-wavelength lasers

C. Nicolaides, 1983, IEEE Journal of Quantum Electronics.

Multichannel relativistic autoionisation of negative ions: the 1s2s2p3 6S5/20 metastable state of Be-

C. Nicolaides, Y. Komninos, G. Aspromallis, 1985 .

LETTER TO THE EDITOR: Single and double photoionization cross sections of the ? 1s2s2p ? state at and far from threshold, from the many-electron, many-photon theory

C. Nicolaides, T. Mercouris, Costas Haritos, 1998 .

Resonance scattering theory: Application to the broad He/sup -/ 1s2s2p /sup 2/P/sup o/ resonance

C. Nicolaides, Y. Komninos, G. Aspromallis, 1983 .

Spectrum of the negative Be ion

C. Nicolaides, D. Beck, G. Aspromallis, 1981 .

LETTER TO THE EDITOR: Very highly excited bound states of atomic negative ions having all their electrons with unpaired spins

C. Nicolaides, Nicos A. Piangos, 1998 .

LETTER TO THE EDITOR: The lifetimes of the fine structure levels of the ? metastable state

C. Nicolaides, G. Aspromallis, C. Sinanis, 1996 .

Towards understanding the stability of the H*4 (C3v) cluster

A. Metropoulos, C. Nicolaides, 1987 .

Quasidiabatic states for intramolecular charge transfer. Application to the protonation of NH3

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1994 .

Geometrically active atomic states and the formation of molecules in their normal shapes

C. Nicolaides, Y. Komninos, 1998 .

Transfer of oscillator strength in regions of (avoided) crossings. The two-state approximation

C. Nicolaides, D. Beck, 1978 .

Specific correlation effects in inner-electron photoelectron spectroscopy

C. Nicolaides, D. Beck, 1982 .

Variations of the surface dipole moment due to anisotropy and chemisorption

A. N. Andriotis, C. Nicolaides, A. Andriotis, 1982 .

Inner electron binding energies of chemisorbed atoms

A. N. Andriotis, C. Nicolaides, A. Andriotis, 1982 .

Control of resonant ionization as a function of time delay between two XUV few-femtosecond pulses. Quantitative application to helium.

C. Nicolaides, Y. Komninos, T. Mercouris, 2019, 1908.07552.

Theory and computation of electromagnetic transition matrix elements in the continuous spectrum of atoms

C. Nicolaides, Y. Komninos, T. Mercouris, 2017, The European Physical Journal D.

Electromagnetic transition matrix elements in the continuous spectrum of atoms: theory and computation

C. Nicolaides, Y. Komninos, T. Mercouris, 2014 .

The electric dipole approximation and the calculation of free - free transition matrix elements in multiphoton processes

C. Nicolaides, Y. Komninos, T. Mercouris, 1997 .

Ionization rates and harmonic generation for H interacting with laser pulses of and peak intensities in the range

C. Nicolaides, T. Mercouris, Stavroula Dionissopoulou, 1996 .

Structure and calculation of field-induced free-free transition matrix elements in many-electron atoms

C. Nicolaides, Y. Komninos, T. Mercouris, 2012 .

Effects on observables of the singularity in the multiphoton free - free dipole matrix elements

C. Nicolaides, Y. Komninos, T. Mercouris, 1996 .

High-order above threshold ionization spectrum of hydrogen and photoelectron angular distributions

C. Nicolaides, T. Mercouris, A. Lyras, 1995 .

Controllable surfaces of path interference in the multiphoton ionization of atoms by a weak trichromatic field

C. Nicolaides, T. Mercouris, 2005 .

Interference generalized cross-section for the multiphoton detachment of H− in dichromatic fields

C. Nicolaides, T. Mercouris, Costas Haritos, 2005 .

The meaning of 'correlations' in the theory of multiphoton detachment

C. Nicolaides, T. Mercouris, 1991 .

Above-Threshold Ionization in the Presence of a Dc Field - Application to H

C. Nicolaides, T. Mercouris, 1991 .

Dynamic polarizability and hyperpolarizability of H− for frequencies below as well as above the ionization threshold

C. Nicolaides, T. Mercouris, Nicos A. Piangos, 1990 .

Many-electron, many-photon theory of nonlinear polarizabilities

C. Nicolaides, T. Mercouris, G. Aspromallis, 1990 .

Polyelectronic theory of atoms in strong laser fields. CO2-laser seven-photon ionisation of H-

C. Nicolaides, T. Mercouris, 1988 .

Lower bounds to static polarizabilities

C. Nicolaides, D. Beck, 1977 .

Complex energies and the polyelectronic Stark problem: II. The Li n = 4 levels for weak and strong fields

C. Nicolaides, S. Themelis, 2001 .

Dichromatic polyphotonic ionization rate of He for λ1 = 248 nm and λ2 = (1/3)248 nm from the many-electron, many-photon theory

C. Nicolaides, T. Mercouris, 2000 .

Time-dependent multiphoton ionization from the He 1s2s metastable state

C. Nicolaides, T. Mercouris, Stavroula Dionissopoulou, 1996 .

Multiphoton response of He to short laser pulses of wavelength 248 nm and intensities in the range

C. Nicolaides, T. Mercouris, Stavroula Dionissopoulou, 1997 .

State- and Property-Specific Quantum Chemistry

C. Nicolaides, 2011 .

Absorption oscillator strengths to autoionizing states in Li, N, and F and their isoelectronic sequences

C. Nicolaides, D. Beck, 1976 .

On the length, velocity and acceleration expressions for the calculation of accurate oscillator strengths in many-electron systems

C. Nicolaides, D. Beck, 1975 .

Theory of One Electron Binding Energies Including Correlation, Relativistic and Radiative Effects: Application to Free Atoms and Metals

C. Nicolaides, D. Beck, 1978 .

Cycle-averaged phase-space states for the harmonic and the Morse oscillators, and the corresponding uncertainty relations

C. Nicolaides, Vasilios Constantoudis, 2009 .

On 'collective excitations' in atoms and molecules

C. Nicolaides, D. Beck, 1976 .

Theory of chemical reactions of vibronically excited H2(B 1Σ+u). I. Prediction of a strongly bound excited state of H4

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1984 .

Tunneling dissociation from a double well via path integrals

C. Nicolaides, Theodosios G. Douvropoulos, T. Douvropoulos, 2003 .

State-specific theory and computation of a polyelectronic atomic state in a magnetic field. Application to doubly excited state of H-

C. Nicolaides, S. Themelis, M. Bylicki, 1994 .

On calculations of correlated wave functions with heavy configurational mixing

C. Nicolaides, 2005 .

The (H2O)2* cluster at a geometry of intramolecular charge transfer

C. Nicolaides, P. Valtazanos, 1991 .

Theory of chemical reactions of vibronically excited H2(B 1Σ+u). II. Noble gas dihydrides

A. Zdetsis, C. Nicolaides, 1984 .

Many-Body Theory of Photoabsorption in Atoms and Molecules

C. Nicolaides, D. Beck, 1978 .

Quantum and classical dynamics of a diatomic molecule in laser fields with frequency in the region producing maximum dissociation

V. Constantoudis, C. Nicolaides, Y. Komninos, 2007 .

Semiclassical path integral theory of a double‐well potential in an electric field

C. Nicolaides, Theodosios G. Douvropoulos, 2006 .

Theory and computation of electron correlation in the continuous spectrum:Double photoionization cross section of H − and He near and far from threshold

C. Nicolaides, T. Mercouris, Costas Haritos, 1997 .

Multielectron radiative transitions

C. Nicolaides, 1993 .

Electron correlation in the Auger spectra of the Ne+ K 2s2p5(3,1P0)3p2S satellites

C. Nicolaides, G. Aspromallis, C. Sinanis, 1995 .

One‐electron binding and auger energies of sulfur in atomic and molecular states

G. Theodorakopoulos, C. Nicolaides, D. Beck, 2009 .

On the Preparation and Observation of the Triply Excited Discrete State He- 2p(3)(4)S(0)

C. Nicolaides, 1992 .

LETTER TO THE EDITOR: Attosecond dynamics of electron correlation in doubly excited atomic states

C. Nicolaides, Y. Komninos, T. Mercouris, 2002 .

Energies, widths and l-dependence of the H- 3P and He- 4P TEIL states

C. Nicolaides, S. Themelis, 1995 .

The geometry of the Wannier two-electron ionisation ladder and the corresponding spectrum

M. Chrysos, C. Nicolaides, Y. Komninos, 1988 .

Degrees of validity of models for the description of doubly excited states of H- and He

C. Nicolaides, Y. Komninos, S. Themelis, 2002 .

Properties of the two‐electron ionization ladder and related good quantum numbers

M. Chrysos, C. Nicolaides, Y. Komninos, 1993 .

Multiphoton single and double ionisation of strontium in the range 532-541 nm

M. Kompitsas, S. Cohen, P. Pillet, 1989 .

LETTER TO THE EDITOR: Weakly bound resonances: electronic structure and partial decay widths of a new He- triply excited 2Po resonance

C. Nicolaides, Nicos A. Piangos, 2001 .

Autoionising 4dnf States and Multiphoton Ionisation Studies in Strontium

M. Kompitsas, P. Pillet, C. Nicolaides, 1990 .

Resonances and exterior complex scaling

M. Chrysos, C. Nicolaides, Y. Komninos, 1990 .

The hyperpolarizability of Li 1s22s 2S: a test case for advanced theories of electronic properties

C. Nicolaides, S. Themelis, 1993 .

Predissociation of the A 2Sigma+, C 2Sigma+ and D 2Sigma+ levels of 4HeH from a multistate close-coupling scattering approach

C. Nicolaides, A. Vegiri, 1995 .

Shape resonances as poles of the semiclassical Green's function obtained from path-integral theory: application to the autodissociation of the He2++ 1sigma(g)+ state.

C. Nicolaides, Theodosios G. Douvropoulos, 2005, The Journal of chemical physics.

Distributed complex Gaussian basis sets: A useful function space for the solution of predissociation problems via the complex eigenvalue Schrödinger equation. Application to the isotope effect of NeH, NeD

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1990 .

Time-dependent formation of the profile of the He 2 s 2 p P o 1 state excited by a short laser pulse

C. Nicolaides, Y. Komninos, T. Mercouris, 2007 .

Quantum-mechanical versus semiclassical calculations of dc-field-induced tunneling rates for helium for field strengths in the range 0.067-1.0 a.u

C. Nicolaides, T. Mercouris, S. Themelis, 1999 .

The state-specific expansion approach to the solution of the time-dependent many-electron problem

C. Nicolaides, 2016 .

Probabilities for transition processes crucial to Li lasers

C. Nicolaides, D. Beck, G. Aspromallis, 1983 .

Comment on the lifetime of the Li1s2p2P2state: How probable is radiative autoionization?

C. Nicolaides, D. Beck, 1978 .

On the stability of excited tetrahydrogen

A. Metropoulos, C. Nicolaides, 1988 .

Potential energy hypersurfaces of H4 in the ground and the first two singlet excited electronic states

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1987 .

Hydrogen molecule and tetrahydrogen cluster embedded in ionic crystals

N. Bacalis, C. Nicolaides, P. Valtazanos, 1990 .

Chemically bound excited clusters

C. Nicolaides, 1989 .

Structure and vibrational analysis of protonated hydrogen peroxide

C. Nicolaides, E. Simandiras, P. Valtazanos, 1989 .

The solution of many electron problems arising when radiation pulses interact with closed or open shell multielectron atomic and molecular states

C. Nicolaides, 2017, 1709.01284.

The X̃ 1A1 → Ã 1B1 transition moment of H2O using state‐specific configuration‐interaction wave functions

R. Buenker, I. Petsalakis, G. Theodorakopoulos, 1985 .

EUV two-photon-ionization cross sections of helium from the solution of the time-dependent Schrödinger equation, and comparison with measurements using free-electron lasers

C. Nicolaides, Y. Komninos, T. Mercouris, 2016 .

Time-resolved hyperfast processes of strongly correlated electrons during the coherent excitation and decay of multiply excited and inner-hole excited states

C. Nicolaides, Y. Komninos, T. Mercouris, 2007 .

Effects of configuration interaction on photoabsorption spectra in the continuum

C. Nicolaides, Y. Komninos, 2004 .

A method for the calculation of transition moments between electronic states of molecules using a different one‐electron basis set for each state

I. Petsalakis, G. Theodorakopoulos, C. Nicolaides, 1986 .

Hartree-fock transition theory and multi-electron transitions in atoms and molecules

C. Nicolaides, 1983 .

High spin and mixed states in BI and BII

C. Nicolaides, D. Beck, 1977 .

Approach to the calculation of the important many-body effects on photoabsorption oscillator strengths

C. Nicolaides, D. Beck, 1975 .

Theory and State-Specific Methods for the Analysis and Computation of Field-Free and Field-Induced Unstable States in Atoms and Molecules

C. Nicolaides, 2010 .

Nearly diabatic states by maximization of the non-orthonormal overlap between model-diabatic and MRD-CI wavefunctions

R. Buenker, I. Petsalakis, G. Theodorakopoulos, 1991 .

The State-Specific Theory of Atomic Structure and Aspects of the Dynamics of Photoabsorption

C. Nicolaides, 1987 .

Configuration interaction study of the oscillator strenghts for the B1A1X1A1 and D1A1X1A1 transitions of the water molecule

R. Buenker, I. Petsalakis, G. Theodorakopoulos, 1985 .

Theoretical autoionisation rates of the 1s2p2 2D and 1s2s2p 2P0 states of Li

C. Nicolaides, G. Aspromallis, 1983 .

Excited States in Quantum Chemistry

C. Nicolaides, D. Beck, 1978 .

A Comment on the Effect of Nonorthonormality on Atomic Transition Probabilities

C. Nicolaides, D. Beck, 1975 .

Ultrafast time delay as a control parameter in resonant ionization by two XUV ultrashort pulses

C. Nicolaides, Y. Komninos, T. Mercouris, 2020, Journal of Physics B: Atomic, Molecular and Optical Physics.

FOTOS applied to molecules: Oscillator strengths in H2O

G. Theodorakopoulos, C. Nicolaides, 2009 .

Relativistic and Coulomb autoionisation in low-lying excited states of fluorine

C. Nicolaides, G. Aspromallis, 1986 .

Transition probabilities for the VUV resonance lines of Mg- and Zn-like molybdenum ions

C. Nicolaides, D. Beck, 1978 .

On the calculation of induced electric and magnetic moments of atoms and molecules

C. Nicolaides, D. Beck, 1977 .

Theoretical lifetimes of the N II 2s2p3, and 2s2 2p3s 1 P0 states obtained by applying “fotos”

C. Nicolaides, D. Beck, 1976 .

Recent developments and applications of the statespecific approach to excited states and their dynamics

C. Nicolaides, 2003 .

Transfer of oscillator strength in regions of avoided crossings. Atomic spectra for non-integer values of Z. application to the NI 4So-4P sequences

C. Nicolaides, D. Beck, 1978 .

Oscillator Strengths in N, N+,O and O+ Obtained from the First Order Theory of Oscillator Strengths (FOTOS)

C. Nicolaides, D. Beck, 1976 .

Autoionisation widths of the doubly excited states of Be

C. Nicolaides, G. Aspromallis, 1984 .

Generalized oscillator strengths and photoionization of alkali-metal atoms

C. Nicolaides, S. N. Tiwary, 1984 .

Computation of time-dependent transition probabilities in excimer molecules induced by femtosecond laser pulses

I. Petsalakis, C. Nicolaides, T. Mercouris, 1994 .

Time-dependent laser-induced molecular formation from repulsive surfaces

I. Petsalakis, C. Nicolaides, T. Mercouris, 1993 .

Time-dependent multiphoton absorption by NO2+: above and below threshold dissociation and the effect of the first excited surface

I. Petsalakis, C. Nicolaides, T. Mercouris, 1994 .

Electric dipole versus full interaction in the dynamics of laser excitation of Rydberg wavepackets

C. Nicolaides, Y. Komninos, T. Mercouris, 2002 .

The continuous spectrum in the solution of the time-dependent Schrödinger equation for laser-atom interactions

C. Nicolaides, T. Mercouris, 2000 .

Does a delta function atom interacting with a superstrong laser pulse exhibit stabilization

C. Nicolaides, T. Mercouris, 1999 .

Photoelectron spectroscopy of chemisorbed atoms

A. N. Andriotis, C. Nicolaides, A. Andriotis, 1983 .

Excited 2Σ+u states of He+2 and the formation of explosive He2+2

A. Metropoulos, C. Nicolaides, 1991 .

Classical Dynamics of Escape in a periodically Driven Unbound Hamiltonian System: Initial Phase Effects

Vassilios Constantoudis, Leonidas Konstantinidis, Cleanthes A. Nicolaides, 2011, Int. J. Bifurc. Chaos.

Stabilization and relative phase effects in a dichromatically driven diatomic Morse molecule: interpretation based on nonlinear classical dynamics.

V. Constantoudis, C. Nicolaides, 2005, The Journal of chemical physics.

Atoms in strong fields

C. Clark, M. Nayfeh, C. Nicolaides, 1990 .

He in two-color AC-fields of λ1=248 nm and λ2=(1/m) 248 nm, m=2, 3, 4. The rate of multiphoton ionization, for weak fields, is a simple function of the phase

C. Nicolaides, T. Mercouris, 2001 .

Hole projection, saddle points, and localization in the theory of autoionizing states.

C. Nicolaides, 1992, Physical review. A, Atomic, molecular, and optical physics.

State-specific approach and computation of resonance states: Identification and properties of the lowest 2 P o and 2 D triply excited states of He -

C. Nicolaides, Nicos A. Piangos, 2001 .

State-specific, many-electron theory of core levels in metals: The 1s binding energy of Be metal

A. Zdetsis, C. Nicolaides, A. Andriotis, 1984 .

K-shell binding energy of Be and its fluorescence yield

C. Nicolaides, Y. Komninos, D. Beck, 1983 .

Nonhyperbolic escape and changes in phase-space stability structures in laser-induced multiphoton dissociation of a diatomic molecule.

V. Constantoudis, C. Nicolaides, 2001, Physical review. E, Statistical, nonlinear, and soft matter physics.

Computation of strong-field multiphoton processes in polyelectronic atoms: State-specific method and applications to H and Li-

Komninos, C. Nicolaides, Y. Komninos, 1994, Physical review. A, Atomic, molecular, and optical physics.

The variational calculation of energies and widths of resonances

Cleanthes A. Nicolaides, Donald R. Beck, C. Nicolaides, 1978 .

The width of He 2s 2p 1P0 from a variational calculation using complex coordinates

C. Nicolaides, Y. Komninos, T. Mercouris, 1981 .

The wavefunction of non-stationary states in terms of complex coordinates and a related variational principle

C. Nicolaides, Yiannis Komninos, 1981 .