Channeling of antiprotons

被引:14
|
作者
Uggerhoj, UI
Bluhme, H
Knudsen, H
Moller, SP
Uggerhoj, E
Morenzoni, E
Scheidenberger, C
机构
[1] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark
[2] Aarhus Univ, Inst Storage Ring Facil, DK-8000 Aarhus, Denmark
[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[4] GSI Darmstadt, D-64291 Darmstadt, Germany
关键词
D O I
10.1016/S0168-583X(03)01117-0
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We present experimental results for channeling of 1.4 MeV antiprotons in a 0.5 pm thick (100) silicon crystal. The 'half-widths' for the observed channeling effect, Deltapsi(p)(_), is significantly smaller than the Lindhard angle psi(1), as is the case for electrons where typical angles are about Deltapsi(e-) similar or equal to 0.6psi(1). In the case of protons and positrons, critical angles are of the order Deltapsi(e+) similar or equal to Deltapsi(p) similar or equal to psi(1). Thus, we may attribute the difference between Deltapsi(p)(.e-)(_) and Deltapsi(p.e+) to the sign of charge of the penetrating particle. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:402 / 408
页数:7
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