arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1004.3150nucl-th
收藏

二质子放射性和三体衰变。五.改进动量分布

Two-proton radioactivity and three-body decay. V. Improved momentum distributions

L. V. Grigorenko, I. A. Egorova, M. V. Zhukov, R. J. Charity, K. Miernik

摘要:

如今,量子力学理论允许人们可靠地计算2p放射性(真正的三体衰变)的过程以及相应的能量和角相关,直到1000 fm量级的距离。然而,现代实验的精确度现在已经足以表明预测的理论分布的一些不足之处。在本文中,我们讨论的外推沿经典的轨迹作为一种方法,以改善收敛的理论能量和角度的关联在非常大的距离(原子距离的顺序),只有长程库仑力仍然在运作。这种方法的精度证明使用“完全”可解的半解析模型与简化的三体哈密顿。研究还表明,对于重2p发射体,2p衰变动量分布对原子电子屏蔽效应敏感。我们比较理论结果与现有的实验数据。

英文摘要:

Nowadays quantum-mechanical theory allows one to reliably calculate the processes of 2p radioactivity (true three-body decays) and the corresponding energy and angular correlations up to distances of the order of 1000 fm. However, the precision of modern experiments has now become sufficient to indicate some deficiency of the predicted theoretical distributions. In this paper we discuss the extrapolation along the classical trajectories as a method to improve the convergence of the theoretical energy and angular correlations at very large distances (of the order of atomic distances), where only the long-range Coulomb forces are still operating. The precision of this approach is demonstrated using the "exactly" solvable semianalytical models with simplified three-body Hamiltonians. It is also demonstrated that for heavy 2p emitters, the 2p decay momentum distributions can be sensitive to the effect of the screening by atomic electrons. We compare theoretical results with available experimental data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑