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Charge distributions of fission fragments of low- and high-energy fission of Fm, No, and Rf isotopes

机译:FM,NO和RF同位素的低和高能裂变的裂变片段的电荷分布

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摘要

The charge (mass) distributions of fission fragments resulting from low- and high-energy fission of the even-even nuclei Fm-254-260,Fm-264, No258-264, and (262-266)Rf are studied with the statistical scission-point model. The calculated results are compared with the available experimental data. In contrast to the experimental data, the calculated mass distribution for Fm-258(s.f.) is strikingly similar to the experimental one for Fm-257(s.f.). The transformation of the shape of charge distribution with increasing isospin and excitation energy occurs gradually and in a similar fashion like that of the mass distribution, but slower. For Fm-254(i.f.), Fm-257(n(th),f), and Fm-260(s.f.), the unexpected difference (symmetric or asymmetric) between the shapes of charge and mass distributions is predicted for the first time. At some critical excitation energy, the saturation of the symmetric component of charge (mass) yields is demonstrated.
机译:统计学中研究了由均匀核FM-254-260,FM-264,NO258-264和(262-266)RF的低和高能量裂变产生的裂变片段的电荷(质量)分布。 轻弹点模型。 计算结果与可用的实验数据进行比较。 与实验数据相比,FM-258(S.F)的计算质量分布与FM-257(S.F)的实验性相似。 电荷分布形状的转化随着索光和激发能量的增加而逐渐发生,并且以类似的方式发生类似的方式,但较慢。 对于FM-254(IF),FM-257(N(TH),F)和FM-260(SF),首次预测了充电形状和质量分布之间的意外差异(对称或不对称) 。 在一些关键励磁能量下,证明了电荷量(质量)产量的对称组分的饱和度。

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