Zegers RG, Brandenburg S, Fleurot FR, Fujiwara M, Guillot J, Hannen VM, Harakeh MN, Laurent H, Willis A, Wilschut HW
Kernfysisch Versneller Instituut, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands.
Phys Rev Lett. 2000 Apr 24;84(17):3779-82. doi: 10.1103/PhysRevLett.84.3779.
The (nat)Pb(3He,tp) reaction at E(3He) = 177 MeV was studied to identify 2Planck's over 2piomega isovector monopole strength in Bi isotopes. Monopole strength was found in the region -45<Q<-30 MeV in the coincidence data. The cross section is compared with distorted-wave Born approximation calculations for non-spin-flip and spin-flip isovector monopole resonances. The observed spin-flip and non-spin-flip monopole strengths in the proton-decay channel amount to 20% of the respective non-energy-weighted sum rule.
研究了E(3He)=177 MeV时的(nat)Pb(3He,tp)反应，以确定铋同位素中2普朗克常量除以2πω的同位旋单极强度。在符合数据中，单极强度出现在-45<Q<-30 MeV的区域。将该截面与非自旋翻转和自旋翻转同位旋单极共振的扭曲波玻恩近似计算结果进行了比较。在质子衰变通道中观测到的自旋翻转和非自旋翻转单极强度分别达到各自非能量加权求和规则的20%。
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