2n-transfer contribution in the 4He(6He,6He)4He cross section at Ec.m.=11.6 MeV -: art. no. 044602

被引:34
|
作者
Raabe, R
Andreyev, A
Huyse, M
Piechaczek, A
Van Duppen, P
Weissman, L
Wöhr, A
Angulo, C
Cherubini, S
Musumarra, A
Baye, D
Descouvemont, P
Davinson, T
Di Pietro, A
Laird, AM
Ostrowski, A
Shotter, A
Galanina, LI
Zelenskaya, NS
机构
[1] Univ Louvain, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium
[2] Catholic Univ Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium
[3] Catholic Univ Louvain, Ctr Rech Cyclotron, B-1348 Louvain, Belgium
[4] Free Univ Brussels, B-1050 Brussels, Belgium
[5] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland
[6] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, Russia
来源
PHYSICAL REVIEW C | 2003年 / 67卷 / 04期
关键词
D O I
10.1103/PhysRevC.67.044602
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
The He-6 + He-4 elastic scattering cross section was measured at E-c.m.=11.6 MeV using a He-6 radioactive beam and a He-4-implanted Al foil as target. The use of the thin implanted target allowed to enlarge the angular range in which the data were collected, with respect to a previous measurement at the same center-of-mass energy. The new and previous data are compared with several calculations. The inclusion of a description for the 2n-transfer process, either with a parity-dependent term, or with a distorted-wave Born approximation transfer amplitude, is crucial to reproduce the increase of the cross section at large angles, thus assessing the contribution of the 2n-transfer process to the reaction. At the present energy, the complicated nature of the transfer process and the possible role played by the coupling to other channels, in particular, the breakup, require sophisticated reaction models in order to extract the relevant information on the peculiar He-6 nucleus. The quality of the data is such that the differences between He-6 and the similar Li-6 system should be identified by such calculations.
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页数:6
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