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arXiv 0806.1718nucl-th
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两核子动量密度对总对动量的依赖性

Dependence of two-nucleon momentum densities on total pair momentum

R. B. Wiringa, R. Schiavilla, Steven C. Pieper, J. Carlson

摘要:

计算了3 He和4 He的基态的双核子动量分布随核子相对动量和总动量的变化。我们使用变分蒙特卡罗波函数来自一个现实的哈密顿量与两个和三个核子的潜力。当相对动量为(300- 500)MeV/c,总动量为零时,pp对的动量分布远小于pn对的动量分布。然而,当总动量增加到400 MeV/c时,在这个相对动量范围内pp对pn对的比率增加,并接近极限,对于3 He为1/2,对于4 He为1/4,对应于这些核中pp对pn对的比率。这种行为在双核子敲除过程中应该很容易观察到,比如A(e,e 'pN)。

英文摘要:

Two-nucleon momentum distributions are calculated for the ground states of 3He and 4He 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 3He and 1/4 for 4He, 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'pN).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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