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arXiv 0909.5618nucl-th
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β稳定线外核对称能的新推导

A new derivation of symmetry energy from nuclei beyond the β-stability line

V. M. Kolomietz, A. I. Sanzhur

摘要:

本文提出了由β稳定线以外的核的中子-质子化学势位移Δλ=λ_{n}- λ_{p}直接导出对称能的方法。我们观察到存在异常强(约15%)壳振荡的对称能量系数b_{sym}。我们的研究结果并没有证实在质量数A \approx 100处存在异常大的对称能系数值,而这一点在参考文献[1]中已有报道。[2]的文件。使用的拟合过程中,我们已经评估了体积,b_{sym,vol},和表面,b_{sym,surf},对称能的贡献。我们已经将表面积与体积比的实验值估计为r_{S/V} =| b_{sym,surf} }|/ b_{sym,vol} \approx 1.7对于拟合区间A \geq 50。

英文摘要:

We suggest the procedure of direct derivation of the symmetry energy from the shift of neutron-proton chemical potentials Δλ=λ_{n}- λ_{p} for nuclei beyond the beta-stability line. We observe the presence of anomalous strong (about 15%) shell oscillations at the symmetry energy coefficient b_{sym}. Our results do not confirm the existence of exceptionally large values of the symmetry energy coefficient at mass number A\approx 100 which was earlier reported in Ref.[2]. Using the fitting procedure, we have evaluated the volume, b_{sym,vol}, and surface, b_{sym,surf}, contributions to the symmetry energy. We have estimated the experimental value of surface-to-volume ratio as r_{S/V}=|b_{sym,surf}}|/b_{sym,vol}\approx 1.7 for the fitting interval A\geq 50.

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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