Measurement of radiation chemical yield of alanine radicals using SQUID
- 1. National Institute of Advanced Industrial Science and Technology (AIST), National Metrology Institute of Japan, Research Institute for Measurement and Analytical Instrumentation, Tsukuba, Ibaraki (Japan)
- 2. National Institute of Advanced Industrial Science and Technology (AIST), National Metrology Institute of Japan, Research Institute for Material and Chemical Measurement, Tsukuba, Ibaraki (Japan)
- 3. Tokyo University, School of Engineering, Institute of Engineering Innovation, Tokyo(Japan)
Description
Alanine dosimeter is useful for measuring high doses, and the alanine radical signal generated after irradiation is measured using an electron spin resonance spectrometer. Radiation chemical yield, which is the amount of material produced, destroyed, or changed per unit of energy, is defined for the chemical dosimeters but the reported uncertainty of the radiation chemical yield for alanine radicals is more than 10 %. Recently, an effective magnetic moment method was developed to measure the amount of radical atoms and molecules with high precision. In this paper, we report measurement results of the absolute amount of alanine radicals using the effective magnetic moment method with a superconducting quantum interference device to determine the radiation chemical yield with smaller uncertainty. (author)
Availability note (English)
Available from https://radiation-chemistry.org/kaishi/114pdf/114_27.pdfAbstract (Japanese)
アラニン線量計は大線量の測定に有用な線量計の一種であり,放射線照射後に発生するアラニンラジカルの信号は電子スピン共鳴装置を用いて測定される.化学線量計には放射線化学収量という,単位エネルギーあたりに生成・破壊・変化した物質量という量が定められているが,これまで報告されているアラニンラジカルの放射線化学収量の不確かさは10 %以上である.本稿では,超伝導量子干渉計を用いた有効磁気モーメント法を利用して,より小さい不確かさで放射線化学収量を測定した結果について報告する.(著者)Additional details
Additional titles
- Original title (Japanese)
- SQUID を用いたアラニンラジカルの放射線化学収量の測定
Publishing Information
- Journal Title
- Hoshasen Kagaku (Online)
- Journal Issue
- no.114
- Series
- 雑誌名:放射線化学
- Journal Page Range
- p. 27-32
- ISSN
- 2188-0115
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 56002197
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ALANINES; CHEMICAL DOSEMETERS; CHEMICAL RADIATION EFFECTS; CURIE-WEISS LAW; ELECTRON SPIN RESONANCE; ELECTROPHORESIS; G VALUE; MAGNETIC MOMENTS; POST-IRRADIATION EXAMINATION; RADIATION CHEMISTRY; RADIATION METROLOGY; RADICALS; SQUID DEVICES
- Descriptors DEC
- AMINO ACIDS; CARBOXYLIC ACIDS; CHEMISTRY; DOSEMETERS; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; MAGNETIC RESONANCE; MEASURING INSTRUMENTS; METROLOGY; MICROWAVE EQUIPMENT; ORGANIC ACIDS; ORGANIC COMPOUNDS; RADIATION EFFECTS; RESONANCE; SUPERCONDUCTING DEVICES
Optional Information
- Notes
- 9 refs., 4 figs.