Dependence of two-nucleon momentum densities on total pair momentum

被引：29

作者：

Wiringa, R. B. ^{[1
]}

Schiavilla, R. ^{[2
,3
]}

Pieper, Steven C. ^{[1
]}

Carlson, J. ^{[4
]}

机构：

[1] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[2] Ctr Theory, Jefferson Lab, Newport News, VA 23606 USA

[3] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA

[4] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW C | 2008年 / 78卷 / 02期

关键词：

D O I：

10.1103/PhysRevC.78.021001

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：

Two-nucleon momentum distributions are calculated for the ground states of 3 He and 4 He as a function of the nucleons' relative and total momenta. We use variational Monte Carlo wave functions derived from a realistic Hamiltonian with two- and three-nucleon potentials. The momentum distribution of pp pairs is found to be much smaller than that of pn pairs for values of the relative momentum in the range 300-500 MeV/c and vanishing total momentum. However, as the total momentum increases to 400 MeV/c, the ratio of pp to pn pairs in this relative momentum range grows and approaches the limit 1/2 for He-3 and 1/4 for He-4, corresponding to the ratio of pp to pn pairs in these nuclei. This behavior should be easily observable in two-nucleon knock-out processes, such as A (e, e(1) pN).

引用

页数：3