Many-body theory of gamma spectra from positron-atom annihilation

被引：38
|
作者：
Dunlop, L. J. M. [1 ]
Gribakin, G. F. [1 ]
机构：
[1] Queens Univ Belfast, Dept Appl Math & Theoret Phys, Belfast BT7 1NN, Antrim, North Ireland
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2006年 / 39卷 / 07期
关键词：
D O I：
10.1088/0953-4075/39/7/008
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A many-body theory approach to the calculation of gamma spectra of positron annihilation on many-electron atoms is developed. We evaluate the first-order correlation correction to the annihilation vertex and perform numerical calculations for the noble gas atoms. Extrapolation with respect to the maximal orbital momentum of the intermediate electron and positron states is used to achieve convergence. The inclusion of correlation corrections improves agreement with experimental gamma spectra.
引用
收藏
页码：1647 / 1668
页数：22
相关论文
共 50 条
  • [1] Many-body theory of positron-atom interactions
    Gribakin, GF
    Ludlow, J
    PHYSICAL REVIEW A, 2004, 70 (03): : 032720 - 1
  • [2] Effect of positron-atom interactions on the annihilation gamma spectra of molecules
    Green, D. G.
    Saha, S.
    Wang, F.
    Gribakin, G. F.
    Surko, C. M.
    NEW JOURNAL OF PHYSICS, 2012, 14
  • [3] ANNIHILATION IN POSITRON-ATOM COLLISIONS - NEW APPROACH
    DRACHMAN, RJ
    SUCHER, J
    PHYSICAL REVIEW A, 1979, 20 (02): : 442 - 444
  • [4] Many-body effects observed in the positron annihilation experiment
    Kontrym-Sznajd, G
    Sormann, H
    ACTA PHYSICA POLONICA A, 2005, 107 (04) : 562 - 569
  • [5] Many-body aspects of positron annihilation in the electron gas
    Apaja, V
    Denk, S
    Krotscheck, E
    PHYSICAL REVIEW B, 2003, 68 (19)
  • [6] The energy dependence of the annihilation rate in positron-atom scattering
    Van Reeth, P
    Humberston, JW
    JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (05) : L231 - L238
  • [7] Detecting Positron-Atom Bound States through Resonant Annihilation
    Dzuba, V. A.
    Flambaum, V. V.
    Gribakin, G. F.
    PHYSICAL REVIEW LETTERS, 2010, 105 (20)
  • [8] Enhancement of positron-atom annihilation near the positronium formation threshold
    Gribakin, GF
    Ludlow, J
    PHYSICAL REVIEW LETTERS, 2002, 88 (16) : 4 - 163202
  • [9] Many-body calculations of positron scattering and annihilation from noble-gas atoms
    Dzuba, VA
    Flambaum, VV
    Gribakin, GF
    King, WA
    JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1996, 29 (14) : 3151 - 3175
  • [10] Theory of ionization processes in positron-atom collisions
    Della Picca, R.
    Fiol, J.
    Barrachina, R. O.
    Rodriguez, V. D.
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2006, 247 (01): : 52 - 57
12345