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arXiv 0912.2533nucl-th
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大核中的自旋-三重态配对

Spin-triplet pairing in large nuclei

G. F. Bertsch, Y. Luo

摘要:

当核非常大并且中子和质子数$Z,N$相等时,预计核配对凝聚体的特征将从自旋单线态改变为自旋三线态。我们调查这两个阶段之间的过渡的Hartree-Fock-Bogoliubov方程的框架内,使用零程相互作用产生的配对。我们证实,极大的核确实有利于三重态配对凝聚,从已知的系统学的哈密顿参数。发现有利相依赖于费米能级处的特定轨道。具有良好自旋三重态凝聚体的最小核在质量区域A ~ 130-140。

英文摘要:

The nuclear pairing condensate is expected to change character from spin-singlet to spin-triplet when the nucleus is very large and the neutron and proton numbers $Z,N$ are equal. We investigate the transition between these two phases within the framework of the Hartree-Fock-Bogoliubov equations, using a zero-range interaction to generate the pairing. We confirm that extremely large nucleus would indeed favor triplet pairing condensates, with the Hamiltonian parameters taken from known systematics. The favored phase is found to depend on the specific orbitals at the Fermi energy. The smallest nuclei with a well-developed spin-triplet condensate are in the mass region A ~ 130-140.

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