The fundamental rotational interval of para-H2 (+) by MQDT-assisted Rydberg spectroscopy of H2.

Transitions from selected nd Rydberg states of H2 to n'p/f Rydberg series converging on the lowest two (N(+) = 0 and 2) rotational levels of the X(+)  (2)Σg (+) (v(+) = 0) ground state of para-H2 (+) have been measured in the range 1-7.4 THz using a laser-based, pulsed, narrow-band source of submillimeter-wave radiation. The analysis of the spectra by multichannel quantum-defect theory (MQDT) has allowed a complete interpretation of the fine structures of the Rydberg series and their dependence on the principal quantum number. The extrapolation of the series to their limits with MQDT has enabled the determination of the first rotational interval of para-H2 (+), which is 174.236 71(7) cm(-1) (5 223 485.1(2.3) MHz).

[1]  F. Merkt,et al.  Determination of the binding energies of the np Rydberg states of H2, HD, and D2 from high-resolution spectroscopic data by multichannel quantum-defect theory. , 2014, The Journal of chemical physics.

[2]  J. Karr,et al.  Theoretical transition frequencies beyond 0.1 ppb accuracy in H2+ , HD+ , and antiprotonic helium , 2013, 1312.3728.

[3]  F. Merkt,et al.  High-resolution laser spectroscopy between 0.9 and 14.3 THz in a supersonic beam: Rydberg-Rydberg transitions of atomic Xe at intermediate n values. , 2013, The Journal of chemical physics.

[4]  U. Bressel,et al.  Manipulation of individual hyperfine states in cold trapped molecular ions and application to HD+ frequency metrology. , 2012, Physical review letters.

[5]  S. Schiller,et al.  Observation of a rotational transition of trapped and sympathetically cooled molecular ions , 2012, 1202.5672.

[6]  R. Gargano,et al.  Calculation of the H2+ rovibrational energies and spectroscopic constants in the 2pπ, 3dσ, 4dσ, 4fπ, 4fσ, 5gσ, and 6iσ electronic states , 2012 .

[7]  W. Ubachs,et al.  Towards measuring the ionisation and dissociation energies of molecular hydrogen with sub-MHz accuracy. , 2011, Faraday discussions.

[8]  Jinjun Liu,et al.  Generation of widely tunable Fourier-transform-limited terahertz pulses using narrowband near-infrared laser radiation , 2009 .

[9]  M. Evans,et al.  Rotationally Resolved Vacuum Ultraviolet Pulsed Field Ionization-Photoelectron Vibrational Bands for H2+ (X2g+, v+=0-18) , 2007 .

[10]  V. Korobov.  Leading-order relativistic and radiative corrections to the rovibrational spectrum of H 2 + and H D + molecular ions , 2006 .

[11]  A. Wüest,et al.  High-resolution millimeter wave spectroscopy and multichannel quantum defect theory of the hyperfine structure in high Rydberg states of molecular hydrogen H2. , 2004, The Journal of chemical physics.

[12]  F. Merkt,et al.  Using High Rydberg States as Electric Field Sensors , 1999 .

[13]  Jacob M. Taylor,et al.  Variational calculations on the hydrogen molecular ion , 1998, physics/9811043.

[14]  R. E. Moss.  Calculations for the vibration-rotation levels of H+ 2 in its ground and first excited electronic states , 1993 .

[15]  Fu,et al.  Determination of the hyperfine structure of H2+( nu =0, R=1) by microwave spectroscopy of high-L n=27 Rydberg states of H2. , 1992, Physical review. A, Atomic, molecular, and optical physics.

[16]  F. Merkt,et al.  Final‐state interactions in the zero‐kinetic‐energy‐photoelectron spectrum of H2 , 1992 .

[17]  G. Herzberg,et al.  High orbital angular momentum states in H2 and D2. III. Singlet–triplet splittings, energy levels, and ionization potentials , 1990 .

[18]  Hessels,et al.  Series mixing in high-L Rydberg states of H2: An experimental test of polarization-model predictions. , 1990, Physical review. A, Atomic, molecular, and optical physics.

[19]  A. Carrington,et al.  Microwave electronic spectrum of the H2+ ion , 1989 .

[20]  J. Poll,et al.  On the higher vibration-rotational levels of HD+ and H2 + , 1986 .

[21]  D. M. Bishop,et al.  Theoretical study of H+2 spectroscopic properties. IV. Adiabatic effects for the 2pπu and 3dσg electronic states , 1975 .

[22]  Ch. Jungen,et al.  Rydberg series and ionization potential of the H2 molecule , 1972 .

[23]  L. Åsbrink.  The photoelectron spectrum of H2 , 1970 .

[24]  U. Fano.  Quantum Defect Theory of l Uncoupling in H 2 as an Example of Channel-Interaction Treatment , 1970 .

[25]  K. B. Jefferts.  Rotational Hfs Spectra of H_{2}^{+} Molecular Ions , 1968 .

[26]  E. Fermi.  Sopra lo Spostamento per Pressione delle Righe Elevate delle Serie Spettrali , 1934 .

[27]  K. B. Jefferts.  HYPERFINE STRUCTURE IN THE MOLECULAR ION H$sub 2$ . , 1969 .