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Title: System for measuring temporal profiles of scintillation at high and different linear energy transfers by using pulsed ion beams

Abstract

We have developed a system for measuring the temporal profiles of scintillation at high linear energy transfer (LET) by using pulsed ion beams from a cyclotron. The half width at half maximum time resolution was estimated to be 1.5–2.2 ns, which we attributed mainly to the duration of the pulsed ion beam and timing jitter between the trigger signal and the arrival of the ion pulse. The temporal profiles of scintillation of BaF{sub 2} at different LETs were successfully observed. These results indicate that the proposed system is a powerful tool for analyzing the LET effects in temporal profiles of scintillation.

Authors:
;  [1];  [2]; ;  [3];  [4]
  1. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan)
  2. Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292 (Japan)
  3. Quantum Beam Science Directorate, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292 (Japan)
  4. Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)
Publication Date:
OSTI Identifier:
22392303
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BARIUM FLUORIDES; CYCLOTRONS; ION BEAMS; LET; PULSES; SCINTILLATIONS; SIGNALS; TIME RESOLUTION

Citation Formats

Koshimizu, Masanori, E-mail: koshi@qpc.che.tohoku.ac.jp, Asai, Keisuke, Kurashima, Satoshi, Taguchi, Mitsumasa, Kimura, Atsushi, and Iwamatsu, Kazuhiro. System for measuring temporal profiles of scintillation at high and different linear energy transfers by using pulsed ion beams. United States: N. p., 2015. Web. doi:10.1063/1.4904872.
Koshimizu, Masanori, E-mail: koshi@qpc.che.tohoku.ac.jp, Asai, Keisuke, Kurashima, Satoshi, Taguchi, Mitsumasa, Kimura, Atsushi, & Iwamatsu, Kazuhiro. System for measuring temporal profiles of scintillation at high and different linear energy transfers by using pulsed ion beams. United States. doi:10.1063/1.4904872.
Koshimizu, Masanori, E-mail: koshi@qpc.che.tohoku.ac.jp, Asai, Keisuke, Kurashima, Satoshi, Taguchi, Mitsumasa, Kimura, Atsushi, and Iwamatsu, Kazuhiro. Thu . "System for measuring temporal profiles of scintillation at high and different linear energy transfers by using pulsed ion beams". United States. doi:10.1063/1.4904872.
@article{osti_22392303,
title = {System for measuring temporal profiles of scintillation at high and different linear energy transfers by using pulsed ion beams},
author = {Koshimizu, Masanori, E-mail: koshi@qpc.che.tohoku.ac.jp and Asai, Keisuke and Kurashima, Satoshi and Taguchi, Mitsumasa and Kimura, Atsushi and Iwamatsu, Kazuhiro},
abstractNote = {We have developed a system for measuring the temporal profiles of scintillation at high linear energy transfer (LET) by using pulsed ion beams from a cyclotron. The half width at half maximum time resolution was estimated to be 1.5–2.2 ns, which we attributed mainly to the duration of the pulsed ion beam and timing jitter between the trigger signal and the arrival of the ion pulse. The temporal profiles of scintillation of BaF{sub 2} at different LETs were successfully observed. These results indicate that the proposed system is a powerful tool for analyzing the LET effects in temporal profiles of scintillation.},
doi = {10.1063/1.4904872},
journal = {Review of Scientific Instruments},
number = 1,
volume = 86,
place = {United States},
year = {Thu Jan 15 00:00:00 EST 2015},
month = {Thu Jan 15 00:00:00 EST 2015}
}
  • A theoretical model is presented for the linear-energy-transfer (LET) variation of the relative scintillation yield in liquid argon. It is based on energy partition between the core and the penumbra of the charged particle track with little quenching in the penumbra except for fission fragments. Scintillation from the core can be quenched significantly by a biexcitonic mechanism. Some detailed calculations indicate that the electron-ion recombination may occur before exciton self-trapping. Fairly good agreement with experiment has been obtained with respect to the relative variation of the scintillation yield with LET using a diffusion-reaction model of free excitons with a specificmore » reaction rate within acceptable limits. At the same LET different heavy-ion tracks can develop different quenching ratios depending on the density of deposited energy in the core.« less
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  • Ion beam methods have been used in a study of the beryllium rich region of the beryllium--aluminum--iron phase diagram. Tailored alloys formed by ion-implanting aluminum and iron into beryllium were annealed, and their evolution with time was followed by ion backscattering analysis. The maximum and minimum aluminum to iron atomic ratios in the ternary phase of nominal composition AlFeBe/sub 4/ were determined in the temperature range 773 to 1073/sup 0/K; these ratios are 1.4 +- 0.1 and 0.93 +- 0.15, respectively, with any temperature dependence being less than the experimental uncertainty. In addition, the solubilities of aluminum and iron inmore » beryllium were measured for the three-phase condition where ..cap alpha..--Be, AlFeBe/sub 4/, and FeBe/sub 11/ coexist. When combined with previous ion beam results for the boundaries about the ..cap alpha..--Be phase on the phase diagram, these data provide a detailed picture of the beryllium-rich region of the beryllium--aluminum--iron phase diagram.« less
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