Resonant scattering of positronium as a quasifree electron

被引：13

作者：

Shipman, M. ^{[1
]}

Brawley, S. J. ^{[1
]}

Sarkadi, L. ^{[2
]}

Laricchia, G. ^{[1
]}

机构：

[1] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[2] Hungarian Acad Sci ATOMKI, Inst Nucl Res, Pf 51, H-4001 Debrecen, Hungary

来源：

PHYSICAL REVIEW A | 2017年 / 95卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

COLLIMATED POSITRONIUM; BEAM PRODUCTION; CROSS-SECTIONS; PS BEAM; COLLISIONS; STATES; ATOMS;

D O I：

10.1103/PhysRevA.95.032704

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In order to clarify the physics underlying the observations of the electronlike behavior of positronium (Ps) and its resonant scattering from CO2, we have measured the Ps + N-2 total cross section and found it also to exhibit significant structure. Analysis of the resonances reveals that Ps is distorted in the collisions and classical trajectory Monte Carlo calculations indicate that the electron is on average closer to the target than the positron, which may in turn bind resonantly to the ensuing temporary negative ion. This description of the nature of Ps resonances agrees with long-standing theoretical predictions.

引用

页数：5

共 50 条

[1] Positronium scattering from atoms and molecules [J].

Armitage, S ;

Laricchia, G .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2002, 192 (1-2) :67-73

[2] Self-Amplified Gamma-Ray Laser on Positronium Atoms from a Bose-Einstein Condensate [J].

Avetissian, H. K. ;

Avetissian, A. K. ;

Mkrtchian, G. F. .

PHYSICAL REVIEW LETTERS, 2014, 113 (02)

[3] Importance of the H- channel in Ps-H scattering -: art. no. 030502 [J].

Blackwood, JE ;

McAlinden, MT ;

Walters, HRJ .

PHYSICAL REVIEW A, 2002, 65 (03) :1-4

[4] RESONANT TRANSFER AND EXCITATION IN ION-ATOM COLLISIONS [J].

BRANDT, D .

PHYSICAL REVIEW A, 1983, 27 (03) :1314-1318

[5]

Bransden B. H., 2002, PHYS ATOMS MOL, P1014

[6] Positronium Production and Scattering below Its Breakup Threshold [J].

Brawley, S. J. ;

Fayer, S. E. ;

Shipman, M. ;

Laricchia, G. .

PHYSICAL REVIEW LETTERS, 2015, 115 (22)

[7] Resonant Scattering of Positronium in Collision with CO2 [J].

Brawley, S. J. ;

Williams, A. I. ;

Shipman, M. ;

Laricchia, G. .

PHYSICAL REVIEW LETTERS, 2010, 105 (26)

[8] Electron-Like Scattering of Positronium [J].

Brawley, S. J. ;

Armitage, S. ;

Beale, J. ;

Leslie, D. E. ;

Williams, A. I. ;

Laricchia, G. .

SCIENCE, 2010, 330 (6005) :789-789

[9] Efficient Production of Rydberg Positronium [J].

Cassidy, D. B. ;

Hisakado, T. H. ;

Tom, H. W. K. ;

Mills, A. P., Jr. .

PHYSICAL REVIEW LETTERS, 2012, 108 (04)

[10] Laser Excitation of Positronium in the Paschen-Back Regime [J].

Cassidy, D. B. ;

Hisakado, T. H. ;

Tom, H. W. K. ;

Mills, A. P., Jr. .

PHYSICAL REVIEW LETTERS, 2011, 106 (17)

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