Digital positron lifetime spectrometer for measurements of radioactive materials

被引：22

作者：

Jardin, M.

Lambrecht, M.

Rempel, A.

Nagai, Y.

van Walle, E.

Almazouzi, A.

机构：

[1] CEN SCK, Belgian Nucl Res Ctr, Reactor Mat Res Dept, B-2400 Mol, Belgium

[2] Russian Acad Sci, Inst Solid State Chem, Ekaterinburg 620219, Russia

[3] Tohoku Univ, Oarai Ctr, Inst Mat Res, Oarai, Ibaraki 3111313, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2006年 / 568卷 / 02期

关键词：

digital; positron annihilation; positron-lifetime spectroscopy; three-detector set-up; neutron-irradiated RPV steels; digital oscilloscope; photomultipliers;

D O I：

10.1016/j.nima.2006.08.087

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A digital positron lifetime spectrometer for the measurements of high-level radioactive materials has been constructed and successfully tested. The equipment consists of a digital oscilloscope and three movable scintillation detectors operating in triple-coincidence mode. The time resolution of 188 ps full-width at half-maximum (FWHM) is achieved for the positron lifetime measurements of radioactive specimens. The set-up has been calibrated, optimised and tested by comparison of the results of well-known material with and without high background radiation. This paper reports on the radiological shielding, electronic update, stability and the performance of this new spectrometer that has been installed in the controlled area of the Laboratory for High and Medium level Activity (LHMA) at SCK center dot CEN. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：716 / 722

页数：7

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