Using photons for non-destructive testing of thick materials: a simulation study

被引：1

作者：

Oishi, R ^{[1
]}

Nagai, H ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Instrumentat Frontier, Tsukuba, Ibaraki 3058568, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2004年 / 535卷 / 03期

关键词：

positron annihilation lifetime; non-destructive test; photon conversion;

D O I：

10.1016/j.nima.2004.06.165

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Positron annihilation spectroscopy using positron annihilation lifetimes has been successfully studied for non-destructive material testing. A positron inspection probe is annihilated with an electron at the front of the material. The application of the positron lifetime method is restricted to thin materials. A photon with energy exceeding 1.02 MeV reaches the materials' depth and can produce a positron through gamma-conversion. Such a photon-produced positron is a probe for thick materials. The probability of gamma-conversion, however, is low. The method of photon-produced positron annihilation lifetimes is restricted by statistics. We estimated the expected number of events and the statistical uncertainties of the lifetime measurements for a non-destructive test, such as an SUS316 fatigue monitoring, to construct a fatigue-monitoring system. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：706 / 715

页数：10

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