Isotopic yield in cold binary fission of even-even ^244-258Cf isotopes

详细信息    查看全文

• 作者：K.P. Santhosh ; ^{drkpsanthosh@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Annu Cyriac ; Sreejith Krishnan
• 关键词：Spontaneous fission ; Heavy particle radioactivity
• 刊名：Nuclear Physics A
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：949
• 期：Complete
• 页码：8-21
• 全文大小：1166 K

文摘

The cold binary fission of even–even ^244–258Cf isotopes has been studied by taking the interacting barrier as the sum of Coulomb and proximity potential. The favorable fragment combinations are obtained from the cold valley plot (plot of driving potential vs. mass number of fragments) and by calculating the yield for charge minimized fragments. It is found that for ^244,246,248Cf isotopes highest yield is for the fragments with isotope of Pb (Z=82$Z=82$) as one fragment, whereas for ²⁵⁰Cf and ²⁵²Cf isotopes the highest yield is for the fragments with isotope of Hg (Z=80$Z=80$) as one fragment. In the case of ^254,256,258Cf isotopes the highest yield is for the fragments with Sn (Z=50$Z=50$) as one fragment. Thus, the fragment combinations with maximum yield reveal the role of doubly magic and near doubly magic nuclei in binary fission. It is found that asymmetric splitting is favored for Cf isotopes with mass number A≤250$A\le 250$ and symmetric splitting is favored for Cf isotopes with A>252$A>252$. In the case of Cf isotope with 1a0573a6b4b47812fcdf578c7919b6b" title="Click to view the MathML source">A=252$A=252$, there is an equal probability for asymmetric and symmetric splitting. The individual yields obtained for the cold fission of ²⁵²Cf isotope are compared with the experimental data taken from the 11a" title="Click to view the MathML source">γ-γ-γ$\gamma \text{-}\gamma \text{-}\gamma$ coincidences technique using Gammasphere.