Development of the fast neutron standard using a Be({alpha},n) reaction at the National Metrology Institute of Japan.

Development of the fast neutron standard using a Be({alpha},n) reaction at the National Metrology Institute of Japan. Research Abstract Details 

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Development of the fast neutron standard using a Be({alpha},n) reaction at the National Metrology Institute of Japan. Abstract Text:

This paper describes the 8-MeV neutron field where the neutrons are generated in the (9)Be(alpha,n)(12)C reaction by bombardment of a beryllium target with a 2.4-MeV (4)He(+) beam from a Van de Graaff accelerator. The neutron field is being prepared for a new national standard on neutron fluence in Japan. Absolute measurement of the neutron fluence was taken using a proton recoil neutron detector, consisting of a silicon surface barrier detector with a polyethylene radiator. Neutron spectra were measured using a newly developed recoil proton spectrometer and a liquid organic scintillation detector. The gamma rays existing in the field were also characterised using a liquid organic scintillation detector. The ambient dose equivalents of the gamma rays were estimated to be <100 microSv at the neutron fluence of 10(7) neutrons cm(-2).

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Development of the fast neutron standard using a Be({alpha},n) reaction at the National Metrology Institute of Japan. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Radiation protection dosimetry

VOLUME: 126

Page Numbers: 130-3

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ISSN: 0144-8420

DAY: 18

MONTH: 05

YEAR: 2007

Development of the fast neutron standard using a Be({alpha},n) reaction at the National Metrology Institute of Japan. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Development of the fast neutron standard using a Be({alpha},n) reaction at the National Metrology Institute of Japan.

AFFILIATION: National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.

Country: England

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MEDLINETA: Radiat Prot Dosimetry

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