Mass Equilibration and Fluctuations in the Angular Momentum Dependent Dynamics of Heavy Element Synthesis Reactions,Physical Review Letters

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Mass Equilibration and Fluctuations in the Angular Momentum Dependent Dynamics of Heavy Element Synthesis Reactions
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-11-24 , DOI: 10.1103/physrevlett.127.222501
T Tanaka ₁ , D J Hinde ₁ , M Dasgupta ₁ , E Williams ₁ , K Vo-Phuoc ₁ , C Simenel _{1,

2} , E C Simpson ₁ , D Y Jeung ₁ , I P Carter ₁ , K J Cook ₁ , N R Lobanov ₁ , D H Luong ₁ , C Palshetkar ₁ , D C Rafferty ₁ , K Ramachandran ₁

Affiliation

Mass and angle distributions for the

{}^{52}{Cr} + {}^{198}{Pt}

and

{}^{54}{Cr} + {}^{196}{Pt}

reactions (both forming

{}^{250}{No}

) were measured and subtracted, giving new information on fast quasifission mass evolution, and the first direct determination of the dependence of sticking times on angular momentum. TDHF calculations showed good agreement with average experimental values, but experimental mass distributions unexpectedly extended to symmetric splits while the peak yield remained close to the initial masses. This implies a strong role of fluctuations in mass division early in the collision, giving insights into the transition from fast energy dissipative deep-inelastic collisions to quasifission.

中文翻译：

重元素合成反应角动量相关动力学中的质量平衡和波动

质量和角度分布

{}^{52}铬 + {}^{198}铂

和

{}^{54}铬 + {}^{196}铂

反应（均形成

{}^{250}不

) 被测量和减去，给出了关于快速准裂变质量演化的新信息，并首次直接确定了粘附时间对角动量的依赖性。TDHF 计算显示出与平均实验值的良好一致性，但实验质量分布出乎意料地扩展到对称分裂，而峰值产率仍然接近初始质量。这意味着碰撞早期质量分裂波动的重要作用，提供了从快速耗散深非弹性碰撞到准裂变的转变的见解。

更新日期：2021-11-25

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