论文标题
完全电离高Z重离子的弹性碰撞中的正电子发射
Positron emission in elastic collisions of fully ionized high-Z heavy ions
论文作者
论文摘要
给定的一组核轨迹的成对产生概率的最新理论研究预测了重离子弹性碰撞中自发性正电子发射的可观察性。这些计算扩展到对比率$ p_ {y}（η）/p_ {y}（1）$的比率的调查，以在小正电子能量下正电子发射的部分概率。结果表明，通过分析$ p_ {y}（η）/p_ {y}（y}（1）$，$ r_ {min} $ r_ {min} $〜_ {$ 〜_ {\ sim}}} {\ sim} \ \！另外，将完全离子重离子的U+CM和CM+CM碰撞的正电子发射的横截面与以前具有部分离子化弹丸的结果进行了比较，并显示出57至72的因子增加。
Recent theoretical investigations of pair-production probabilities for given sets of nuclear trajectories predict the observability of spontaneous positron emission in elastic collisions of heavy ions. These calculations are extended to the investigation of ratios $P_{y}(η)/P_{y}(1)$ for partial probabilities of positron emission at small positron energies. The results suggest a possible observability of spontaneous positron emission in elastic collisions of bare heavy ions by analyzing the slope of $P_{y}(η)/P_{y}(1)$ for values of $R_{min}$ $~_{\sim}\!\!\!\!^<$ 0.75 $R_{cr}$. In addition calculations of cross sections for positron emission in U+Cm and Cm+Cm collisions of fully ionized heavy ions are compared with former results with partly ionized projectiles and show an increase by factors of 57 to 72.
