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arXiv 0705.4526nucl-ex
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$^{42}$ Si中N=28髋臼杯闭合塌陷

Collapse of the N=28 shell closure in $^{42}$Si

B. Bastin, S. Grévy, D. Sohler, O. Sorlin, Zs. Dombrádi, N. L. Achouri, J. C. Angélique, F. Azaiez, D. Baiborodin, R. Borcea, C. Bourgeois, A. Buta, A. Bürger, … 展开作者

B. Bastin, S. Grévy, D. Sohler, O. Sorlin, Zs. Dombrádi, N. L. Achouri, J. C. Angélique, F. Azaiez, D. Baiborodin, R. Borcea, C. Bourgeois, A. Buta, A. Bürger, R. Chapman, J. C. Dalouzy, Z. Dlouhy, A. Drouard, Z. Elekes, S. Franchoo, S. Iacob, B. Laurent, M. Lazar, X. Liang, E. Liénard, J. Mrazek, L. Nalpas, F. Negoita, N. A. Orr, Y. Penionzhkevich, Zs. Podolyák, F. Pougheon, P. Roussel-Chomaz, M. G. Saint-Laurent, M. Stanoiu, I. Stefan, F. Nowacki, A. Poves

摘要:

用在束$γ$能谱法测量了39 A. MeV的$^{42,44}$ S次级束分裂的富中子$^{42}$ Si和$^{41,43}$ P的激发态能量。$^{42}$ Si的低2 $^+$能量(770(19)keV)以及$^{41,43}$ P的能级图为Z=14和N=28球壳层闭合的消失提供了证据,这主要归因于质子-中子张量力的作用。新的壳模型计算表明,$^{42}$ Si最好描述为变形良好的扁转子。

英文摘要:

The energies of the excited states in very neutron-rich $^{42}$Si and $^{41,43}$P have been measured using in-beam $γ$-ray spectroscopy from the fragmentation of secondary beams of $^{42,44}$S at 39 A.MeV. The low 2$^+$ energy of $^{42}$Si, 770(19) keV, together with the level schemes of $^{41,43}$P provide evidence for the disappearance of the Z=14 and N=28 spherical shell closures, which is ascribed mainly to the action of proton-neutron tensor forces. New shell model calculations indicate that $^{42}$Si is best described as a well deformed oblate rotor.

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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