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SYSTEMATICS OF THE ALPHA-DECAY TO VIBRATIONAL 2~+ STATES

机译:振动2〜+状态的Alpha衰变的系统学

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We have done a systematic analysis of α-decays to excited 2+ states. Collective excitations were considered within the Quasiparticle Random-Phase Approximation. As a residual two-body force we used the surface-delta interaction. The only free parameter is the ratio of the isovector and isoscalar strengths. This approach is able to explain the general features of electromagnetic and α-transitions along isotope chains. We conclude that the α-decay to excited 2~+-state is induced mainly by the effective residual interaction between proton and neutron systems. We also predicted α-decay hindrance factors of 2~+-states with respect to the ground state and B(E2) values for even-even nuclei.
机译:我们已经对激发2+态的α衰变做了系统的分析。在准粒子随机相位近似内考虑了集体激发。作为残余两体力,我们使用了表面-三角形相互作用。唯一的自由参数是等矢量和等标量强度之比。这种方法能够解释沿着同位素链的电磁和α跃迁的一般特征。我们得出结论,α衰变到激发2〜+态主要是由质子和中子系统之间的有效残余相互作用引起的。我们还预测了偶数核相对于基态和B(E2)值的2〜+状态的α-衰变阻碍因子。

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