Antiatom-atom scattering with the close-coupling model

被引：1

作者：

Chakraborty, S

Basu, A

Chaudhuri, P

Sinha, PK

Ghosh, AS ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Theoret Phys, Kolkata 700032, W Bengal, India

[2] Naheshtala Coll, Dept Phys, Kolkata 700140, W Bengal, India

[3] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

[4] Bangabasi Coll, Dept Phys, Kolkata 700009, W Bengal, India

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2004年 / 221卷

关键词：

positronium; antihydrogen; scattering; close-coupling model; scattering length; cross section;

D O I：

10.1016/j.nimb.2004.03.024

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Collisions involving atoms and antiatoms have been investigated at low incident energies using close-coupling approximation (CCA). We investigate ortho-positronium-ortho-positronium (o-Ps-o-Ps) scattering up to incident energy 3.4 eV. Antihydrogen-hydrogen elastic scattering has been studied in the energy range 10(-10) to 10(-2) a.u., whereas antihydrogen-helium system has been investigated in the range 10(-16) to 10(-2) a.u. The s-wave elastic scattering parameters, viz., scattering length, effective range, phase shift, cross section etc., have been reported. The present predictions have been compared with the other corresponding theoretical predictions wherever available. Usefulness of CCA model to investigate these systems at thermal energies has been emphasized. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：12 / 20

页数：9

共 25 条

[1] Production and detection of cold antihydrogen atoms [J].

Amoretti, M ;

Amsler, C ;

Bonomi, G ;

Bouchta, A ;

Bowe, P ;

Carraro, C ;

Cesar, CL ;

Charlton, M ;

Collier, MJT ;

Doser, M ;

Filippini, V ;

Fine, KS ;

Fontana, A ;

Fujiwara, MC ;

Funakoshi, R ;

Genova, P ;

Hangst, JS ;

Hayano, RS ;

Holzscheiter, MH ;

Jorgensen, LV ;

Lagomarsino, V ;

Landua, R ;

Lindelöf, D ;

Rizzini, EL ;

Macri, M ;

Madsen, N ;

Manuzio, G ;

Marchesotti, M ;

Montagna, P ;

Pruys, H ;

Regenfus, C ;

Riedler, P ;

Rochet, J ;

Rotondi, A ;

Rouleau, G ;

Testera, G ;

Variola, A ;

Watson, TL ;

van der Werf, DP .

NATURE, 2002, 419 (6906) :456-459

[2] Calculation of cross sections for very low-energy hydrogen-antihydrogen scattering using the Kohn variational method [J].

Armour, EAG ;

Chamberlain, CW .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2002, 35 (22) :L489-L494

[3]

Armour EAG, 2001, NEW DIRECTIONS IN ANTIMATTER CHEMISTRY AND PHYSICS, P53

[4] An upper bound on the internuclear distance below which a proton and an antiproton are unable to bind an electron and a positron [J].

Armour, EAG ;

Carr, JM ;

Zeman, V .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (16) :L679-L684

[5] Production of antihydrogen [J].

Baur, G ;

Boero, G ;

Brauksiepe, S ;

Buzzo, A ;

Eyrich, W ;

Geyer, R ;

Grzonka, D ;

Hauffe, J ;

Kilian, K ;

LoVetere, M ;

Macri, M ;

Moosburger, M ;

Nellen, R ;

Oelert, W ;

Passaggio, S ;

Pozzo, A ;

Rohrich, K ;

Sachs, K ;

Schepers, G ;

Sefzick, T ;

Simon, RS ;

Stratmann, R ;

Stinzing, F ;

Wolke, M .

PHYSICS LETTERS B, 1996, 368 (03) :251-258

[6] Observation of atomic antihydrogen [J].

Blanford, G ;

Christian, DC ;

Gollwitzer, K ;

Mandelkern, M ;

Munger, CT ;

Schultz, J ;

Zioulas, G .

PHYSICAL REVIEW LETTERS, 1998, 80 (14) :3037-3040

[7]

Cassidy DB, 2001, NEW DIRECTIONS IN ANTIMATTER CHEMISTRY AND PHYSICS, P83

[8] A MODIFICATION OF CLOSE-COUPLING APPROXIMATION FOR E-H SCATTERING ALLOWING FOR LONG-RANGE INTERACTIONS [J].

DAMBURG, R ;

KARULE, E .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON, 1967, 90 (569P) :637-&

[9] Hydrogen-antihydrogen collisions [J].

Froelich, P ;

Jonsell, S ;

Saenz, A ;

Zygelman, B ;

Dalgarno, A .

PHYSICAL REVIEW LETTERS, 2000, 84 (20) :4577-4580

[10] Background-free observation of cold antihydrogen with field-ionization analysis of its states -: art. no. 213401 [J].

Gabrielse, G ;

Bowden, NS ;

Oxley, P ;

Speck, A ;

Storry, CH ;

Tan, JN ;

Wessels, M ;

Grzonka, D ;

Oelert, W ;

Schepers, G ;

Sefzick, T ;

Walz, J ;

Pittner, H ;

Hänsch, TW ;

Hessels, EA .

PHYSICAL REVIEW LETTERS, 2002, 89 (21)

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