Detection of sub micro Gray dose levels using OSL phosphor LiMgPO4:Tb,B

被引：21

作者：

Rawat, N. S. ^{[1
]}

Dhabekar, Bhushan ^{[1
]}

Muthe, K. P. ^{[2
]}

Koul, D. K. ^{[1
]}

Datta, D. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Radiol Phys & Advisory Div, Bombay, Maharashtra, India

[2] Bhabha Atom Res Ctr, Tech Phys Div, Bombay, Maharashtra, India

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2017年 / 397卷

关键词：

CW-OSL; Minimum measurable dose (MMD); Signal to noise ratio (SNR); LMP; OPTICALLY STIMULATED LUMINESCENCE; COMPONENTS; DOSIMETRY;

D O I：

10.1016/j.nimb.2017.02.035

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Detection of sub micro Gray doses finds application in personnel and environmental monitoring, and nuclear forensics. Recently developed LiMgPO4:Tb,B (LMP) is highly sensitive Optically Stimulated Luminescence (OSL) phosphor with excellent dosimetric properties. The OSL emission spectrum of LMP consists of several peaks attributed to characteristic Tb3+ emission. The OSL emission peak at 380 nm is favorable for bi-alkali PMT used in RISO reader system. It is demonstrated that significant improvement in dose detection threshold can be realized for LMP by optimization of continuous wave (CW) OSL parameters like stimulation intensity and readout time. The minimum measurable dose (MMD) as low as 0.49 mu Gy in readout time of less than 1 s at stimulation intensity of 32 mW/cm(2) has been achieved using this phosphor. The recommendations for choice of parameters for personnel and environmental monitoring are also discussed. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：27 / 32

页数：6

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