Dose Rate Effects in Fluorescence Chemical Dosimeters Exposed to Picosecond Electron Pulses: An Accurate Measurement of Low Doses at High Dose Rates

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F22%3A00554302" target="_blank" >RIV/61389021:_____/22:00554302 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/22:00554203 RIV/61388955:_____/22:00554818

Result on the web

<a href="https://bioone.org/journals/radiation-research/volume-197/issue-2/RADE-20-00292.1/Dose-Rate-Effects-in-Fluorescence-Chemical-Dosimeters-Exposed-to-Picosecond/10.1667/RADE-20-00292.1.full" target="_blank" >https://bioone.org/journals/radiation-research/volume-197/issue-2/RADE-20-00292.1/Dose-Rate-Effects-in-Fluorescence-Chemical-Dosimeters-Exposed-to-Picosecond/10.1667/RADE-20-00292.1.full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1667/RADE-20-00292.1" target="_blank" >10.1667/RADE-20-00292.1</a>

Result language

angličtina

Original language name

Dose Rate Effects in Fluorescence Chemical Dosimeters Exposed to Picosecond Electron Pulses: An Accurate Measurement of Low Doses at High Dose Rates

Original language description

The development of ultra-intense electron pulse for applications needs to be accompanied by the implementation of a practical dosimetry system. In this study four different systems were investigated as dosimeters for low doses with a very high-dose-rate source. First, the effects of ultra-short pulses were investigated for the yields of the Fricke dosimeter based on acidic solutions of ferrous sulfate - it was established that the yields were not significantly affected by the high dose rates, so the Fricke dosimeter system was used as a reference. Then, aqueous solutions of three compounds as fluorescence chemical dosimeters were utilized, each operated at a different solution pH: terephthalic acid basic, trimesic acid acidic, and coumarin-3-carboxylic acid (C3CA) neutral. Fluorescence chemical dosimeters offer an attractive alternative to chemical dosimeters based on optical absorption for measuring biologically relevant low doses because of their higher sensitivity. The effects of very intense dose rate (TGy/ s) from pulses of fast electrons generated by a picosecond linear accelerator on the chemical yields of fluorescence chemical dosimeters were investigated at low peak doses (<20 Gy) and compared with yields determined under low-dose-rate irradiation from a 60 Co gamma-ray source (mGy/s). For the terephthalate and the trimesic acid dosimeters changes in the yields were not detected within the estimated (-10%) precision of the experiments, but, due to the complexity of the mechanism of the hydroxyl radical initiated reactions in solutions of the relevant aromatic compounds, significant reductions of the chemical yield (-60%) were observed when the C3CA dosimeter was irradiated with the ultra-short pulses.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Radiation Research

ISSN

0033-7587

e-ISSN

1938-5404

Volume of the periodical

197

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

18

Pages from-to

131-148

UT code for WoS article

—

EID of the result in the Scopus database

2-s2.0-85124189023