Do we understand the electric quadrupole strength distributions in magic nuclei?
Do we understand the electric quadrupole strength distributions in magic nuclei?
复制标题
我们了解魔核中的电四极强度分布吗？
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
V. Ponomarev
中科院分区：
文献类型：
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作者：
J. Enders;O. Karg;P. von Neumann;V. Ponomarev
摘要：对40，48Ca的电四极（E2）强度分布与52Cr的新结果进行了比较。推导出的E2强度分布和等量能量加权E2求和规则的穷举性有很大的不同。微观方法无法再现这些差异。对现有数据的调查表明，在等密度巨四极共振以下的双幻核中，能量加权等密度E2和规则的耗尽通常比半幻核大两倍以上。另一方面，在这个能量区域中的E2强度消耗了总E2强度的约50%，与壳层闭合无关。
Abstract.A comparison between the electric quadrupole (E2) strength distributions in 40, 48Ca with new results from 52Cr is presented. The deduced E2 strength distributions and the exhaustion of the isoscalar energy-weighted E2 sum rule are very different. Microscopic approaches fail to reproduce these differences. A survey of the available data shows that the exhaustion of the energy-weighted isoscalar E2 sum rule in doubly magic nuclei below the isoscalar giant quadrupole resonance is typically more than two times larger than in semi-magic nuclei. On the other hand, the E2 strength in this energy region exhausts about 50% of the total E2 strength, independent from shell closures.