A MODIFIED ADIABATIC APPROACH TO POSITRON-ATOM AND POSITRON-MOLECULE POLARIZATION POTENTIALS - APPLICATION TO POSITRON-HE SCATTERING

被引：20
|
作者：
GIBSON, TL
机构：
[1] Department of Physics and Engineering Physics, Texas Tech University, Lubbock, TX, 79409
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1990年 / 23卷 / 04期
关键词：
D O I：
10.1088/0953-4075/23/4/010
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel treatment of short-range correlation effects designed for use in calculating positron-atom and positron-molecule polarisation potentials is presented. The treatment is based on a physically motivated approximation that mimics the effect of the dominant non-adiabatic correction to the adiabatic potential at low scattering energies, namely virtual positronium formation. As an initial test of the method, positron-He scattering phaseshifts, scattering length and differential cross sections have been calculated and found to be in good agreement with accurate results. This method is immediately extendible to positron-molecule collisions and does not require significantly more work than a purely adiabatic treatment. © 1990 IOP Publishing Ltd.
引用
收藏
页码：767 / 776
页数：10
相关论文
共 50 条
  • [31] Measurements of positron-molecule differential scattering cross-sections
    Wayne State Univ, Detroit, United States
    Nucl Instrum Methods Phys Res Sect B, 1-2 (57-60):
  • [32] Measurements of positron-molecule differential scattering cross-sections
    Przybyla, DA
    Addo-Asah, W
    Kauppila, WE
    Kwan, CK
    Stein, TS
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1998, 143 (1-2): : 57 - 60
  • [33] SPIN POLARIZATION IN ELASTIC POSITRON ATOM SCATTERING
    HASENBURG, K
    JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1986, 19 (12) : L499 - L502
  • [34] A pedagogical introduction to the Schwinger variational principle: an application to low energy positron-atom scattering
    Seidel, Eliton Popovicz
    Arretche, Felipe
    EUROPEAN JOURNAL OF PHYSICS, 2021, 42 (04)
  • [35] NUMERICAL DETERMINATION OF ELASTIC POSITRON-ATOM AND ELECTRON-ATOM SCATTERING PHASESHIFTS
    PAGE, BAP
    JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1976, 9 (13) : 2221 - 2233
  • [36] Low-energy positron-molecule scattering set-up
    Rajch, E
    Jaworek, A
    Karwasz, G
    Brusa, RS
    Bettonte, M
    Mariazzi, S
    Zecca, A
    ATOMIC AND MOLECULAR PHYSICS, 2003, 5258 : 190 - 193
  • [37] The influence of f-type function in positron-He/positron-H2 scattering with the Schwinger multichannel method
    Sanchez, S. d'A.
    Lima, M. A. P.
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2008, 266 (03): : 447 - 451
  • [38] Detecting Positron-Atom Bound States through Resonant Annihilation and Scattering
    Flambaum, V. V.
    Dzuba, V. A.
    Gribakin, G. F.
    Harabati, C.
    XXIX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2015), PTS 1-12, 2015, 635
  • [39] CRITICAL-POINTS IN LOW-ENERGY POSITRON-ATOM SCATTERING
    WADEHRA, JM
    STEIN, TS
    KAUPPILA, WE
    PHYSICAL REVIEW A, 1984, 29 (05): : 2912 - 2914
  • [40] COUPLED-CHANNEL CALCULATIONS OF POSITRON-ATOM SCATTERING AT INTERMEDIATE ENERGIES
    HEWITT, RN
    NOBLE, CJ
    BRANSDEN, BH
    HYPERFINE INTERACTIONS, 1994, 89 (1-4): : 195 - 207
12345