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arXiv 0907.4594nucl-ex
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精确β能谱的GEANT4蒙特卡罗模拟程序

A GEANT4 Monte-Carlo Simulation Code for precision beta spectroscopy

F. Wauters, I. Kraev, D. Zakoucky, M. Beck, V. V. Golovko, V. Yu. Kozlov, T. Phalet, M. Tandecki, E. Traykov, S. Van Gorp, N. Severijns

摘要:

核β衰变中β不对称性参数的测量是寻找电荷变化弱相互作用中非V-A分量的一个潜在的非常灵敏的工具。为了达到所需的精确度(百分比水平),在分析数据时必须正确地考虑到改变β辐射发射模式的所有影响,即装置的几何形状、磁场对β粒子轨迹的影响以及源中、样品架上和探测器上的(反向)散射。一个彻底的研究,这些影响和详细的GEANT 4蒙特卡罗模拟的基础上,为此目的开发的一种新方法在这里。该代码开发的β不对称测量的低温核取向(LTNO)的方法,但原则上可以推广到其他实验装置使用其他偏振技术。

英文摘要:

The measurement of the beta asymmetry parameter in nuclear beta decay is a potentially very sensitive tool to search for non V-A components in the charge-changing weak interaction. To reach the required precision (percent level) all effects that modify the emission pattern of the beta radiation, i.e. the geometry of the setup, the effect of the magnetic field on the trajectories of beta particles as well as (back)scattering in the source, on the sample holder and on the detector, have to be correctly taken into account in the analysis of the data. A thorough study of these effects and a new method based on detailed GEANT4 Monte-Carlo simulations that was developed for this purpose is presented here. The code was developed for beta asymmetry measurements by means of the Low Temperature Nuclear Orientation (LTNO) method, but can in principle be generalized to other experimental setups using other polarization techniques.

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。

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