Study of the evolution of population levels of transverse energy in axial channeling of weakly relativistic positrons in hexagonal crystals

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-02-27 DOI:10.1016/j.nima.2025.170372

N.V. Maksyuta, V.I. Vysotskii, D.N. Maksyuta, S.V. Efimenko

{"title":"Study of the evolution of population levels of transverse energy in axial channeling of weakly relativistic positrons in hexagonal crystals","authors":"N.V. Maksyuta, V.I. Vysotskii, D.N. Maksyuta, S.V. Efimenko","doi":"10.1016/j.nima.2025.170372","DOIUrl":null,"url":null,"abstract":"<div><div>In the work, as a result of numerical solution of the system of kinetic equations for beams of weakly relativistic positrons with angular dispersions <span><math><mrow><msub><mi>θ</mi><mn>0</mn></msub><mo>=</mo><mn>0.2</mn><mo>,</mo><mn>1.0</mn><mo>,</mo><mn>5.0</mn><mspace></mspace><mtext>mrad</mtext></mrow></math></span> and with Lorentz-factors <span><math><mrow><mi>γ</mi><mo>=</mo><mn>10</mn><mo>,</mo><mn>20</mn></mrow></math></span> (channeled along the <em>c</em>-axes in hexagonal crystals of Be, Mg, Sc, Ti, Co, Zn, Se, Y, Zr, Tc, Ru, Cd, Te, La) the populations of quantum levels of transverse energy were determined as functions of the longitudinal coordinate. Based on these data, the functions of radial profiles at different distances from the channel entrance were calculated and the dechanneling lengths were determined.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170372"},"PeriodicalIF":1.5000,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0168900225001731","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}

引用次数: 0

Abstract

In the work, as a result of numerical solution of the system of kinetic equations for beams of weakly relativistic positrons with angular dispersions

θ_{0} = 0.2, 1.0, 5.0 mrad

and with Lorentz-factors

γ = 10, 20

(channeled along the c-axes in hexagonal crystals of Be, Mg, Sc, Ti, Co, Zn, Se, Y, Zr, Tc, Ru, Cd, Te, La) the populations of quantum levels of transverse energy were determined as functions of the longitudinal coordinate. Based on these data, the functions of radial profiles at different distances from the channel entrance were calculated and the dechanneling lengths were determined.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.