Giant dipole resonance built on highly excited states of 120Sn nuclei populated by inelastic alpha scattering.
Giant dipole resonance built on highly excited states of 120Sn nuclei populated by inelastic alpha scattering.
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巨型偶极子共振建立在由非弹性 α 散射填充的 120Sn 核的高度激发态上。
DOI：
10.1103/physrevlett.76.2025
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发表时间：
1996
影响因子：
8.6
通讯作者：
Sobotka
中科院分区：
文献类型：
--
作者：
Ramakrishnan;Baumann;Azhari;Kryger;Pfaff;Thoennesen;Yokoyama;Beene;Halbert;Mueller;Stracener;Varner;Charity.;Dempsey;Sarantites;Sobotka
在30 ~ 130 MeV激发能量范围内测量了热{sup 120}Sn核巨共振衰变产生的高能γ射线。激发的原子核由40和50 MeV/核子的{α}粒子的非弹性散射填充。观察到的共振宽度单调增加，随着激发能量的增加，从5兆电子伏在基态到{约}12兆电子伏在最大的激发能量。非弹性散射主要填充低角动量状态，因此，所观察到的宽度增加归因于温度引起的核形状的波动。美国物理学会（American Physical Society）
High energy {gamma} rays from the decay of the giant resonance in hot {sup 120}Sn nuclei were measured in the excitation energy range of 30{endash}130 MeV. The excited nuclei were populated by inelastic scattering of {alpha} particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase monotonically with increasing excitation energy, from 5 MeV at the ground state to {approximately}12 MeV at the largest excitation energy. Inelastic scattering predominantly populates low angular momentum states, and the observed width increase is thus attributed to fluctuations in the nuclear shape induced by temperature. {copyright} {ital 1996 The American Physical Society.}