Stopping of swift protons in matter and its implication for astrophysical fusion reactions
Stopping of swift protons in matter and its implication for astrophysical fusion reactions
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物质中快速质子的停止及其对天体物理聚变反应的影响
DOI：
10.1103/physrevc.62.045802
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发表时间：
2000
影响因子：
3.1
通讯作者：
D. Paula
中科院分区：
文献类型：
--
作者：
C. Bertulani;D. Paula
研究了快质子在低能碰撞中的停止力与速度的关系。在较低的入射能量下，停止主要是由于核停止和电子的电荷交换。第二种机制在EP>；200 eV时占主导地位。基于双中心电子波函数的电荷交换机制的动力学处理产生了交换几率的透明结果。我们预测在1keV能区，质子在氢靶上的停止截面变化近似为vp。
The velocity dependence of the stopping power of swift protons in low-energy collisions is investigated. At low projectile energies the stopping is mainly due to nuclear stopping and charge exchange of the electron. The second mechanism dominates at Ep>200 eV. A dynamical treatment of the charge exchange mechanism based on two-center electronic wave functions yields transparent results for the exchange probability. We predict that the stopping cross sections vary approximately as v p for projectile protons on hydrogen targets in the 1 keV energy region.