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Journal Articles

LaCl$$_{3}$$(Ce) scintillation detector applications for environmental $$gamma$$-ray measurements of low to high dose rates

Tsutsumi, Masahiro; Tanimura, Yoshihiko

Nuclear Instruments and Methods in Physics Research A, 557(2), p.554 - 560, 2006/02

 Times Cited Count:16 Percentile:71.84(Instruments & Instrumentation)

A new cerium-doped LaCl$$_{3}$$(Ce) scintillator is evaluated with respect to the application in environmental $$gamma$$-ray dosimetry and spectrometry. The scintillator is very attractive for $$gamma$$-ray spectrometry in the case of high count rate, because it has excellent energy resolution and fast decay time. The performance characteristics of a scintillator with a 25.4 mm $$times$$ 25.4 mm LaCl$$_{3}$$(Ce) crystal are studied and compared to those of a NaI(Tl) scintillator with the same size crystal. Acquired pulse-height spectra are converted to dose rates by using the G(E) function method. Though the LaCl$$_{3}$$(Ce) crystal itself produces a rather high background in the crystal itself, the scintillator provides good energy information and dose-rate readings from low to high-level (several mGy/h) by subtracting the self-background. The properties of LaCl$$_{3}$$(Ce) scintillator suggest that the scintillator could be a promising candidate for monitoring at high-dose levels as in emergencies, as well as at ordinary levels of background radiation.

Journal Articles

Development of dose monitoring system applicable to various radiations with wide energy ranges

Sato, Tatsuhiko; Satoh, Daiki; Endo, Akira; Yamaguchi, Yasuhiro

Journal of Nuclear Science and Technology, 42(9), p.768 - 778, 2005/09

 Times Cited Count:17 Percentile:72.90(Nuclear Science & Technology)

A new inventive radiation monitor, designated to DARWIN (Dose Assessment system applicable to various Radiations with WIde energy raNges), has been developed for monitoring doses at workspaces of high energy accelerator facilities and on ground. Characteristics of DARWIN were studied by both calculation and experiment. The calculated results indicate that DARWIN gives reasonable estimations of doses at most radiation fields. It was found from the experiment that DARWIN has an excellent property of measuring doses from all particles that significantly contribute to the background dose - photon, muon and neutron with wide energy ranges.

Journal Articles

Development of neutron-monitor detector using liquid organic scintillator coupled with $$^{6}$$Li+ZnS(Ag) sheet

Sato, Tatsuhiko; Endo, Akira; Yamaguchi, Yasuhiro; Takahashi, Fumiaki

Radiation Protection Dosimetry, 110(1-4), p.255 - 261, 2004/09

 Times Cited Count:8 Percentile:48.16(Environmental Sciences)

For monitoring of neutron doses in high-energy accelerator facilities, we have developed a neutron-monitor detector applicable to energies from the thermal energy to 100 MeV. The detector is composed of a cylindrical (12.7 cm in diameter and 12.7 cm in length) liquid organic scintillator BC501A covered with $$^{6}$$Li+ZnS(Ag) sheets. Characteristics of this phoswitch-type detector were studied experimentally in moderated neutron fields of $$^{241}$$Am-Be and $$^{252}$$Cf sources, and in quasi-monoenergetic neutron fields of 40 and 70 MeV. It was found from the experiments that the detector is enough sensitive to both thermal and fast neutrons, and has an excellent property of pulse-shape discrimination between them. We concluded, therefore, that the detector can be used for monitoring of neutron doses over a wide energy range from the thermal to 100 MeV.

Journal Articles

Development of neutron-monitor detectors applicable to energies from thermal to 100MeV

Endo, Akira; Kim, E.; Yamaguchi, Yasuhiro; Sato, Tatsuhiko; Yoshizawa, Michio; Tanaka, Susumu; Nakamura, Takashi; Rasolonjatovo, A. H. D.*

Journal of Nuclear Science and Technology, 41(Suppl.4), p.510 - 513, 2004/03

no abstracts in English

Journal Articles

Hybrid neutron detector consisting of an organic liquid scintillator and a $$^{6}$$Li glass scintillator for wide energy range

Kim, E.; Endo, Akira; Yamaguchi, Yasuhiro; Yoshizawa, Michio; Nakamura, Takashi*; Rasolonjatovo, D. R. D.*

Nihon Genshiryoku Gakkai Wabun Rombunshi, 1(3), p.317 - 319, 2002/09

no abstracts in English

JAEA Reports

Development of detector for neutron monitor of wide energy range (Joint research)

Kim, E.; Endo, Akira; Yamaguchi, Yasuhiro; Yoshizawa, Michio; Tanaka, Susumu; Shiomi, T.*; Nakamura, Takashi*; Rasolonjatovo, D. R. D.*

JAERI-Tech 2002-041, 73 Pages, 2002/03

JAERI-Tech-2002-041.pdf:4.47MB

no abstracts in English

JAEA Reports

Pulse shape measurements of scintillation emission

; ; Asano, Yoshihiro; Usuda, Shigekazu

JAERI-Tech 98-043, 27 Pages, 1998/09

JAERI-Tech-98-043.pdf:1.05MB

no abstracts in English

Journal Articles

Measurements of response function of organic liquid scintillator for neutron energy range up to 135MeV

Nakao, Noriaki*; Nakamura, Takashi*; ; ; ; ; Tanaka, Shunichi

Nuclear Instruments and Methods in Physics Research A, 362, p.454 - 465, 1995/00

 Times Cited Count:68 Percentile:97.80(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Simultaneous counting of $$alpha$$,$$beta$$ and $$gamma$$ rays with phoswich detectors

Usuda, Shigekazu; Abe, Hitoshi; Mihara, Akira

Journal of Alloys and Compounds, 213-214, p.437 - 439, 1994/00

 Times Cited Count:13 Percentile:68.65(Chemistry, Physical)

no abstracts in English

Journal Articles

Spectrum Measurements of Intermediate Nergy Neutrons by an Organic Scintillator

; ;

Nuclear Instruments and Methods, 84(2), p.269 - 274, 1970/00

no abstracts in English

Journal Articles

Directional anisotropy in the characterisitcs of the organic-crystal scintillators

;

Nuclear Instruments and Methods, 17(3), p.286 - 288, 1962/00

no abstracts in English

11 (Records 1-11 displayed on this page)
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