在 LSS 理论的离子能量域中测定 24Cr、28Ni 和 22Ti 离子穿过 PVC 和 Mylar 箔的实验和计算电子阻挡力

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-09-13 DOI:10.1016/j.nimb.2024.165528

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引用次数: 0

摘要

利用南非约翰内斯堡 iThemba 实验室的 6MV 串联加速器设施，对重离子（28Ni、24Cr 和 22Ti）穿过 PVC 和 Mylar 等薄聚合箔的能量损失进行了测量，能量范围为 0.1-0.3 MeV/n。这些测量推导出的实验停止力数据与使用 Lindhard、Scharff 和 Schiott 公式（LSS）和 SRIM-2013 预测计算出的数据进行了比较。实验值与 LSS 公式计算值之间存在较大偏差。根据物理假设，我们开发了一个相当简单的半经验公式，其中考虑到了平均残余射弹电荷 Z1¯ 和取决于 Z1 和 Z2 的合适的 ξe 因子。我们对这一新的修正 LSS 公式进行了测试，该公式计算出的停止力值与测量值非常接近。

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Experimental and calculated electronic stopping force determination of 24Cr, 28Ni and 22Ti ions crossing PVC and Mylar foils in the ion energy domain of LSS theory

Energy loss measurements for heavy ions (²⁸Ni,²⁴Cr and ²²Ti) crossing thin polymeric foil such as PVC and Mylar in the energy range 0.1–0.3 MeV/n have been carried out utilizing the 6MV Tandem accelerator facility at iThemba-labs in Johannesburg (South Africa). These measurements deduced experimental stopping force data have been compared with those calculated using Lindhard, Scharff and Schiott formulation (LSS) and SRIM-2013 predictions. A large significant deviation has been observed between experimental values and those calculated by LSS formula. Based on physical postulate, we have developed a reasonably simple semi-empirical formula that takes in to account a mean residual projectile charge $\bar{Z 1}$ and suitable $ξ_{e}$ factor which depend on Z1 and Z2. This new modified LSS formula has been tested and the calculated stopping force values generated by this formula are in close agreement with the measured ones.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.