Gamma decay of isovector giant resonances built on highly excited states in 111Sn.
Gamma decay of isovector giant resonances built on highly excited states in 111Sn.
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基于 111Sn 的高激发态的等矢量巨共振的伽马衰变。
DOI：
10.1103/physrevlett.56.1783
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发表时间：
1986
影响因子：
8.6
通讯作者：
Stephens
中科院分区：
文献类型：
--
作者：
Gaardhoje;Ellegaard;Herskind;Diamond;Deleplanque;Dines;Macchiavelli;Stephens
伽马射线跃迁-能量谱最高可达E/亚..伽马../约.=33 MeV，测量了化合物核/超111/锡的衰变(激发能高达E(约.=100 MeV。高于E/SUB..伽马../约=20 MeV，在预期建立在激发态上的等向量巨四极共振的能量范围内，观察到伽马射线超过了等向量巨偶极子共振的贡献。随着核温度和角动量的增加，In/sup 108,111/Sn的巨偶极子共振宽度有较大的增加。
Gamma-ray transition-energy spectra up to E/sub ..gamma../approx. =33 MeV have been measured for the decay of the compound nucleus /sup 111/Sn( populated at excitation energies up to E(approx. =100 MeV. Above E/sub ..gamma../approx. =20 MeV an excess of gamma rays over the contribution from the isovector giant dipole resonance is observed in the energy range where the isovector giant quadrupole resonance built on excited states is expected. The width of the giant dipole resonance in /sup 108,111/Sn( shows a large increase with increasing nuclear temperature and angular momentum.