Isospin fractionation in nuclear multifragmentation

被引：359

作者：

Xu, HS ^{[1
]}

Tsang, MB

Liu, TX

Liu, XD

Lynch, WG

Tan, WP

Vander Molen, A

Verde, G

Wagner, A

Xi, HF

Gelbke, CK

Beaulieu, L

Davin, B

Larochelle, Y

Lefort, T

de Souza, RT

Yanez, R

Viola, VE

Charity, RJ

Sobotka, LG

机构：

[1] Michigan State Univ, Natl Supercond Cyclotron Lab, E Lansing, MI 48824 USA

[2] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.85.716

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Isotopic distributions for light particles and intermediate mass fragments have been measured fur Sn-112 + Sn-112, Sn-112 + Sn-124, Sn-124 + Sn-112, and Sn-124 + Sn-124 collisions at E/A = 50 MeV. Isotope, isotone, and isobar yield ratios are utilized to estimate the isotopic composition of the gas phase at freeze-out. Analyses within the equilibrium limit imply that the gas phase is enriched in neutrons relative to the liquid phase represented by bound nuclei. These observations suggest that neutron diffusion is commensurate with or more rapid than fragment production.

引用

页码：716 / 719

页数：4

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