TITLE

Characterisation of kilo electron volt neutron fluence standard with the 45Sc(p,n)45Ti reaction at NMIJ

AUTHOR(S)
Matsumoto, T.; Harano, H.; Shimoyama, T.; Kudo, K.; Uritani, A.
PUB. DATE
August 2007
SOURCE
Radiation Protection Dosimetry;Aug2007, Vol. 126 Issue 1-4, p155
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We are developing a national standard of a monoenergetic kilo electron volt neutron field with the 45Sc(p,n)45Ti resonance reaction. A wide resonance yields 27.4 keV neutrons at 0° with respect to the proton beam. The proton energy was precisely determined in the measurement of the relative neutron yield as a function of the proton energy from the threshold energy to 2.942 MeV. Absolute measurement of the monoenergetic neutron fluence was performed using a 3He proportional counter. Relative measurement was also carried out using a Bonner sphere calibrated at our 144 keV standard neutron field. Calibration factors were obtained between the count of a neutron monitor and the neutron fluence. A silicon-surface barrier detector with a 6LiF foil converter was also being developed for the neutron fluence measurement. Successful results were obtained in the tests in the 144 keV standard neutron field.
ACCESSION #
44393677

 

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