用指甲进行电子顺磁共振剂量测定的一项进展。

AN ADVANCE IN EPR DOSIMETRY WITH NAILS.

作者信息

Sholom S, McKeever S W S

机构信息

Radiation Dosimetry Laboratory, Department of Physics, Oklahoma State University, Stillwater, OK, USA.

出版信息

Radiat Prot Dosimetry. 2019 Dec 31;186(1):60-64. doi: 10.1093/rpd/ncz019.

DOI:10.1093/rpd/ncz019

PMID:30806471

Abstract

Olive oil is proposed as a medium for storage of nails in the time between nail harvesting and electron paramagnetic resonance (EPR) measurements to minimise the decay of the radiation-induced EPR signals (RIS). The behaviours of three main EPR signals, namely, RIS, mechanically induced and the background signals (MIS and BG, respectively), were studied for storage in olive oil. The properties of the MIS and BG signals were very similar to those previously observed for the storage in a vacuum. The RIS singlet slightly increased during the first day of storage and then remained practically unchanged at least for 6 days. Dose recovery test revealed that doses at the level 2 Gy may be reconstructed with an accuracy of about ±20%.

摘要

橄榄油被提议作为在指甲采集和电子顺磁共振（EPR）测量之间的时间段内储存指甲的介质，以尽量减少辐射诱导的EPR信号（RIS）的衰减。研究了三种主要EPR信号，即RIS、机械诱导信号和背景信号（分别为MIS和BG）在橄榄油中储存时的行为。MIS和BG信号的特性与之前在真空中储存时观察到的非常相似。RIS单线态在储存的第一天略有增加，然后至少在6天内基本保持不变。剂量恢复测试表明，2 Gy水平的剂量可以以约±20%的精度重建。