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Journal Articles

Influence of linear energy transfer on the scintillation decay behavior in a lithium glass scintillator

Koshimizu, Masanori*; Iwamatsu, Kazuhiro*; Taguchi, Mitsumasa; Kurashima, Satoshi; Kimura, Atsushi; Yanagida, Takayuki*; Fujimoto, Yutaka*; Watanabe, Kenichi*; Asai, Keisuke*

Journal of Luminescence, 169(Part B), p.678 - 681, 2016/01

We analyzed the effects of linear energy transfer (LET) on the scintillation properties of a Li glass scintillator, GS20. The scintillation time profiles were measured by using pulsed ion beams having different LETs. The rise in the scintillation time profiles was faster for higher LET, whereas the decay part was not significantly different for largely different LETs. The LET effects in the rise was ascribed to the effects of excited states interaction during the energy transfer process from the host glass to the luminescent centers, Ce$$^{3+}$$ ions. Supposing that the light yield decreases with LET, the fast rise at high LET was explained in terms of the competition between the energy transfer and the quenching due to the excited states interaction.

Journal Articles

Linear energy transfer effects on time profiles of scintillation of Ce-doped LiCaAlF$$_{6}$$ crystals

Yanagida, Takayuki*; Koshimizu, Masanori*; Kurashima, Satoshi; Iwamatsu, Kazuhiro*; Kimura, Atsushi; Taguchi, Mitsumasa; Fujimoto, Yutaka*; Asai, Keisuke*

Nuclear Instruments and Methods in Physics Research B, 365(Part B), p.529 - 532, 2015/12

 Times Cited Count:9 Percentile:69.75(Instruments & Instrumentation)

We measured temporal profiles of scintillation of Ce-doped LiCaAlF$$_{6}$$ scintillator crystals at different linear energy transfers (LETs). Based on the comparison of the high-LET temporal profiles with those at low LET, we found that a fast component was observed only at low LET. The disappearance of the fast component at high LET is tentatively ascribed to quenching of excited states at defects owing to the interaction between excited states via Auger process. In addition, the rise and the initial decay behavior was dependent on the LET. This LET-dependent behavior is explained by a seeming acceleration process and a slowing down process in energy transfer at high LET. The LET-dependent temporal profiles provide a basis of discrimination technique of $$gamma$$-ray and neutron detection events using these scintillators based on the nuclear reaction, $$^{6}$$Li(n,$$alpha$$)t.

Journal Articles

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

Koshimizu, Masanori*; Kurashima, Satoshi; Taguchi, Mitsumasa; Iwamatsu, Kazuhiro; Kimura, Atsushi; Asai, Keisuke*

Review of Scientific Instruments, 86(1), p.013101_1 - 013101_5, 2015/01

 Times Cited Count:9 Percentile:47.26(Instruments & Instrumentation)

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$$_{2}$$ 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.

Journal Articles

X-ray detection capability of a BaCl$$_{2}$$ single crystal scintillator

Koshimizu, Masanori*; Onodera, Kazuya*; Nishikido, Fumihiko*; Haruki, Rie; Shibuya, Kengo*; Kishimoto, Shunji*; Asai, Keisuke*

Journal of Applied Physics, 111(2), p.024906_1 - 024906_5, 2012/01

 Times Cited Count:22 Percentile:70.04(Physics, Applied)

Journal Articles

Investigation on new scintillators for subnanosecond time-resolved X-ray measurements

Haruki, Rie; Shibuya, Kengo*; Nishikido, Fumihiko*; Koshimizu, Masanori*; Yoda, Yoshitaka*; Kishimoto, Shunji*

Journal of Physics; Conference Series, 217, p.012007_1 - 012007_4, 2010/05

 Times Cited Count:3 Percentile:78.3

Journal Articles

Application of accelerators for the research and development of scintillators

Shibuya, Kengo*; Koshimizu, Masanori*; Asai, Keisuke*; Muroya, Yusa*; Katsumura, Yosuke; Inadama, Naoko*; Yoshida, Eiji*; Nishikido, Fumihiko*; Yamaya, Taiga*; Murayama, Hideo*

Review of Scientific Instruments, 78(8), p.083303_1 - 083303_7, 2007/08

 Times Cited Count:6 Percentile:33.56(Instruments & Instrumentation)

Oral presentation

I-127 nuclear resonant quasi-elastic scattering from a potassium iodide aqueous solution

Haruki, Rie; Imai, Yasuhiko*; Koshimizu, Masanori*; Nishikido, Fumihiko*; Shibuya, Kengo*; Kurokuzu, Masayuki*; Yoda, Yoshitaka*; Kishimoto, Shunji*

no journal, , 

no abstracts in English

Oral presentation

Diffusive motion of atoms in a solution studied by nuclear resonant scattering

Haruki, Rie; Imai, Yasuhiko*; Yoda, Yoshitaka*; Koshimizu, Masanori*; Nishikido, Fumihiko*; Shibuya, Kengo*; Kurokuzu, Masayuki*; Kishimoto, Shunji*

no journal, , 

Oral presentation

Observation of scintillation under pulsed ion beam irradiation

Koshimizu, Masanori*; Taguchi, Mitsumasa; Kurashima, Satoshi; Asai, Keisuke*

no journal, , 

no abstracts in English

Oral presentation

Evaluation of a lead-doped scintillator for application of the synchrotron X-ray time spectroscopy

Kishimoto, Shunji*; Nishikido, Fumihiko*; Haruki, Rie; Koshimizu, Masanori*

no journal, , 

no abstracts in English

Oral presentation

LET effects on the scintillation properties of a Ce-doped Ca$$_{3}$$B$$_{2}$$O$$_{6}$$6 scintillator

Koshimizu, Masanori*; Fujimoto, Yutaka*; Yanagida, Takayuki*; Iwamatsu, Kazuhiro; Kimura, Atsushi; Kurashima, Satoshi; Taguchi, Mitsumasa; Asai, Keisuke*

no journal, , 

no abstracts in English

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