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.
引用
收藏
页数：16
相关论文
共 99 条
[1]   EFFECTIVE INTERACTIONS AND SUPERFLUID ENERGY GAPS FOR LOW-DENSITY NEUTRON MATTER [J].
AINSWORTH, TL ;
WAMBACH, J ;
PINES, D .
PHYSICS LETTERS B, 1989, 222 (02) :173-178
[2]   PAIRING INSTABILITY IN HOT ASYMMETRIC NUCLEAR-MATTER [J].
ALM, T ;
FRIMAN, BL ;
ROPKE, G ;
SCHULZ, H .
NUCLEAR PHYSICS A, 1993, 551 (01) :45-53
[3]  
Aoyama S, 2001, PROG THEOR PHYS SUPP, P35, DOI 10.1143/PTPS.142.35
[4]   DEUTERON FORMATION IN EXPANDING NUCLEAR-MATTER FROM A STRONG-COUPLING BCS APPROACH [J].
BALDO, M ;
LOMBARDO, U ;
SCHUCK, P .
PHYSICAL REVIEW C, 1995, 52 (02) :975-985
[5]   SUPERFLUIDITY IN NEUTRON MATTER AND NUCLEAR-MATTER WITH REALISTIC INTERACTIONS [J].
BALDO, M ;
CUGNON, J ;
LEJEUNE, A ;
LOMBARDO, U .
NUCLEAR PHYSICS A, 1990, 515 (03) :409-432
[6]   THEORY OF SUPERCONDUCTIVITY [J].
BARDEEN, J ;
COOPER, LN ;
SCHRIEFFER, JR .
PHYSICAL REVIEW, 1957, 108 (05) :1175-1204
[7]   The halo of the exotic nucleus 11Li:: a single Cooper pair [J].
Barranco, F ;
Bortignon, PF ;
Broglia, RA ;
Colò, G ;
Vigezzi, E .
EUROPEAN PHYSICAL JOURNAL A, 2001, 11 (04) :385-392
[8]   Surface vibrations and the pairing interaction in nuclei [J].
Barranco, F ;
Broglia, RA ;
Gori, G ;
Vigezzi, E ;
Bortignon, PF ;
Terasaki, J .
PHYSICAL REVIEW LETTERS, 1999, 83 (11) :2147-2150
[9]   Self-consistent mean-field models for nuclear structure [J].
Bender, M ;
Heenen, PH ;
Reinhard, PG .
REVIEWS OF MODERN PHYSICS, 2003, 75 (01) :121-180
[10]   TIME-DEPENDENT QUANTUM COLLECTIVE DYNAMICS APPLIED TO NUCLEAR-FISSION [J].
BERGER, JF ;
GIROD, M ;
GOGNY, D .
COMPUTER PHYSICS COMMUNICATIONS, 1991, 63 (1-3) :365-374
12345678910