Mass distribution of fission products has been determined in \(\upalpha +^{\mathrm {232}}\hbox {Th}\) reaction at \(E_{\mathrm {lab}}=36.2\) MeV using \(\upalpha \) particles from the cyclotron at the Variable Energy Cyclotron Centre (VECC), Kolkata. Yields of 64 fission products having half-lives in the range of about \(\sim 1\) min to several days have been measured using gamma ray spectrometry. The mass distribution shows a clear triple humped structure indicating the contribution from both asymmetric and symmetric modes of fission. The experimental mass distribution was well reproduced by the calculation from the GEF code, which takes into account the multi-chance fission.

中文翻译：

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在36.2 MeV alpha中的质量分布引起$$ ^ {232} \ hbox {Th} $$ 232 Th的裂变

裂变产物的质量分布已在\（E _ {\ mathrm {lab}} = 36.2 \） MeV的\（\ upalpha + ^ {\ mathrm {232}} \ hbox {Th} \）反应中使用\（\来自加尔各答可变能量回旋加速器中心（VECC）的回旋加速器的upalpha \）粒子。已经使用伽马射线光谱法测量了具有约\（\ sim 1 \）分钟至几天的半衰期的64种裂变产物的产率。质量分布显示出清晰的三峰驼峰结构，表明来自非对称和对称裂变模式的贡献。考虑到多机会裂变，通过GEF代码进行的计算很好地再现了实验质量分布。