Structure and resonances of the e+–He(1s2s 3Se) system

We have studied the geometry and resonances of the e+He(3Se) system in the framework of hyperspherical coordinates. A model potential proposed by us is used to describe the interaction between the out electron with the He+ ionic core. The calculated binding energy and expectation distance of the system are in agreement with other calculations. In addition, two resonances below the e+–He(1s3s 3Se) threshold and one resonance below the Ps(n=2)–He+ threshold are identified.

[1]  Inga Yur’evna Tolstikhina,et al.  Collision processes involving heavy many-electron ions interacting with neutral atoms , 2013 .

[2]  D. Fursa,et al.  Convergent close coupling calculations for positron-magnesium scattering , 2011 .

[3]  Z. Ren,et al.  S-wave resonances in the positron–helium scattering , 2011 .

[4]  L. Jiao,et al.  Resonance phenomena in e{sup +}-Li collisions , 2011 .

[5]  Xian-zhou Zhang,et al.  S -wave resonances in positron-lithium scattering below the Li ( n = 4 ) thresholds , 2008 .

[6]  K. Varga,et al.  Description of positron-hydrogen resonances using the stochastic variational method , 2008 .

[7]  Xian-zhou Zhang,et al.  S-wave resonances in positron-sodium scattering , 2008 .

[8]  J. Mitroy,et al.  Generating Phase Shifts from Pseudostate Energy Shifts , 2006, physics/0612115.

[9]  Y. K. Ho,et al.  Resonances in positron scattering from Na and K , 2005 .

[10]  A. Frolov.  Positron annihilation in the positron-helium ion e{sup +}[He(2 {sup 3}S)] , 2005 .

[11]  Y. K. Ho,et al.  High partial wave resonances in positron hydrogen scattering , 2004 .

[12]  Y. K. Ho,et al.  S-wave resonances in e + -He scattering below the Ps (n = 2) excitation threshold , 2004 .

[13]  I. Shimamura,et al.  Stable complex-rotation eigenvalues that correspond to no full resonances in scattering: Examples in positron scattering by the helium ion , 2004 .

[14]  J. Mitroy,et al.  POSITRON ANNIHILATION PROFILES FOR HPS AND HE(3SE)E , 1999 .

[15]  K. Varga,et al.  Stochastic Variational Approach to Quantum-Mechanical Few-Body Problems , 1998 .

[16]  J. Mitroy,et al.  A metastable state of positronic helium , 1998 .

[17]  C. Lin,et al.  Nonexistence of Resonances in H 2 , 1998 .

[18]  I. Shimamura,et al.  S -wave resonances in positron scattering by He + , 1997 .

[19]  O. Tolstikhin,et al.  LETTER TO THE EDITOR: `Slow' variable discretization: a novel approach for Hamiltonians allowing adiabatic separation of variables , 1996 .

[20]  Zhou,et al.  Comparative studies of excitations and resonances in H-, Ps-, and e++H systems. , 1995, Physical Review Letters.

[21]  V. Mandelshtam,et al.  Calculation of the density of resonance states using the stabilization method. , 1993, Physical review letters.

[22]  Bhatia,et al.  Search for resonances in positron-atom systems. , 1990, Physical Review A. Atomic, Molecular, and Optical Physics.

[23]  Greene,et al.  Positron-hydrogen resonances associated with the N=2 positronium and N=3 hydrogen thresholds. , 1987, Physical review. A, General physics.

[24]  Greene,et al.  Resonant photodetachment of the positronium negative ion. , 1986, Physical review letters.

[25]  C. Lin.  Feshbach and shape resonances in the e--H $sup 1$P system , 1975 .

[26]  R. J. Drachman.  Feshbach resonances in positron-hydrogen scattering , 1975 .

[27]  I. Epstein,et al.  Binding of positrons to atoms , 1974 .

[28]  H. Snodgrass,et al.  ADIABATIC APPROXIMATION AND NECESSARY CONDITIONS FOR THE EXISTENCE OF BOUND STATES. , 1968 .