Measurement of the dipole and electric quadrupole strength distributions up to 10 MeV in the doubly magic nuclei 40Ca and 48Ca
Measurement of the dipole and electric quadrupole strength distributions up to 10 MeV in the doubly magic nuclei 40Ca and 48Ca
复制标题
测量双魔核 40Ca 和 48Ca 中高达 10 MeV 的偶极子和电四极子强度分布
DOI：
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发表时间：
2000
影响因子：
8.6
通讯作者：
A. Zilges
中科院分区：
文献类型：
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作者：
T. Hartmann;Joachim Enders;Peter Mohr;K. Vogt;S. Volz;A. Zilges
在高分辨光子散射实验中研究了双魔核40 Ca和48 Ca。我们推导出绝对偶极和四极激发强度高达10兆电子伏。在48 Ca中发现了双声子四极-八极态的证据。在更高的能量与40 Ca相反，偶极强度的浓度观察到在48 Ca这是讨论的一个侏儒共振起源于大的中子过剩。
The doubly magic nuclei 40Ca and 48Ca have been studied in high resolution photon scattering experiments. We have derived absolute dipole and quadrupole excitation strengths up to 10 MeV. Evidence was found for a two-phonon quadrupole-octupole state in 48Ca. At higher energies in contrast to 40Ca, a concentration of dipole strength is observed in 48Ca which is discussed in terms of a pygmy resonance originating from the large neutron excess.