Positron annihilation lifetime spectroscopy at a superconducting electron accelerator

被引：26

作者：

Wagner, A. ^{[1
]}

Anwand, W. ^{[1
]}

Attallah, A. G. ^{[2
,3
]}

Dornberg, G. ^{[4
]}

Elsayed, M. ^{[2
]}

Enke, D. ^{[4
]}

Hussein, A. E. M. ^{[2
]}

Krause-Rehberg, R. ^{[2
]}

Liedke, M. O. ^{[1
]}

Potzger, K. ^{[5
]}

Trinh, T. T. ^{[1
,6
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, Inst Radiat Phys, Bautzner Landstr 400, D-01328 Dresden, Germany

[2] Martin Luther Univ Halle Wittenberg, Inst Phys, D-06099 Halle, Germany

[3] Menia Univ, Fac Sci, Phys Dept, El Minia 61519, Egypt

[4] Univ Leipzig, Inst Chem Technol, D-04103 Leipzig, Germany

[5] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Bautzner Landstr 400, D-01328 Dresden, Germany

[6] Tech Univ Dresden, D-01062 Dresden, Germany

来源：

14TH INTERNATIONAL WORKSHOP ON SLOW POSITRON BEAM TECHNIQUES & APPLICATIONS | 2017年 / 791卷

关键词：

BEAM;

D O I：

10.1088/1742-6596/791/1/012004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Helmholtz-Zentrum Dresden-Rossendorf operates a superconducting linear accelerator for electrons with energies up to 35 MeV and average beam currents up to 1.6 mA. The electron beam is employed for production of several secondary beams including X-rays from bremsstrahlung production, neutrons, and positrons. The secondary positron beam after moderation feeds the Monoenergetic Positron Source (MePS) where positron annihilation lifetime (PALS) and positron annihilation Doppler-broadening experiments in materials science are performed in parallel. The adjustable repetition rate of the continuous-wave electron beams allows matching of the pulse separation to the positron lifetime in the sample under study. The energy of the positron beam can be set between 0.5 keV and 20 keV to perform depth resolved defect spectroscopy and porosity studies especially for thin films.

引用

页数：6

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