Spatial structure of neutron Cooper pair in low density uniform matter

被引：148
作者：
Matsuo, M [1 ]
机构：
[1] Niigata Univ, Fac Sci, Dept Phys, Niigata 9502181, Japan
来源：
PHYSICAL REVIEW C | 2006年 / 73卷 / 04期
关键词：
D O I：
10.1103/PhysRevC.73.044309
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 spatial structure of the neutron Cooper pair in superfluid low-density uniform matter is analyzed by means of BCS calculations employing a bare force and the effective Gogny interaction. It is shown that the Cooper pair exhibits a strong spatial dineutron correlation over a wide range of neutron densities rho/rho(0)approximate to 10(-4)-0.5. This feature is related to the crossover behavior between the pairing of the weak coupling BCS type and the Bose-Einstein condensation of bound neutron pairs. It is also shown that the zero-range delta interaction can describe the spatial structure of the neutron Cooper pair if the density-dependent interaction strength and the cutoff energy are appropriately chosen. Parametrizations of the density-dependent delta interaction satisfying this condition are discussed.
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页数：16
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