Observation of large scissors resonance strength in actinides.
Observation of large scissors resonance strength in actinides.
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DOI：
10.1103/physrevlett.109.162503
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发表时间：
2012-06
影响因子：
8.6
通讯作者：
M. Guttormsen;L. Bernstein;A. Bürger;A. Görgen;F. Gunsing;T. Hagen;A. Larsen;T. Renstrøm;S. Sie
中科院分区：
文献类型：
--
作者：
M. Guttormsen;L. Bernstein;A. Bürger;A. Görgen;F. Gunsing;T. Hagen;A. Larsen;T. Renstrøm;S. Sie
首次在锕系准连续体中测量到了轨道M1剪共振。用氘和（3）He诱导的（232）Th反应记录了粒子-γ符合。剩余核（231，232，233）Th和（232，233）Pa在E（γ）=1.0-3.5 MeV区域显示出出乎意料的强积分强度，为B（M1）=11-15μ（n）（2）。由于剪刀共振，锕系元素的γ衰变几率增加，这对未来快核反应堆燃料循环的截面计算很重要，也可能对恒星核合成产生影响。
The orbital M1 scissors resonance has been measured for the first time in the quasicontinuum of actinides. Particle-γ coincidences are recorded with deuteron and (3)He-induced reactions on (232)Th. The residual nuclei (231,232,233)Th and (232,233) Pa show an unexpectedly strong integrated strength of B(M1)=11-15μ(n)(2) in the E(γ)=1.0-3.5 MeV region. The increased γ-decay probability in actinides due to scissors resonance is important for cross-section calculations for future fuel cycles of fast nuclear reactors and may also have an impact on stellar nucleosynthesis.