Development of the Neutron Calibration Fields using Accelerators at FRS and TIARA of JAEA
2008; Taylor & Francis; Volume: 45; Issue: sup5 Linguagem: Inglês
10.1080/00223131.2008.10875824
ISSN1881-1248
AutoresY. Shikaze, Yoshihiko Tanimura, Jun Saegusa, Masahiro Tsutsumi, Shigeru Shimizu, Michio Yoshizawa, Yasuhiro Yamaguchi,
Tópico(s)Radiation Detection and Scintillator Technologies
ResumoAbstractThe neutron calibration fields using accelerators have been developed at the Facility of Radiation Standards (FRS) of JAEA-Tokai for neutrons below 20 MeV and at Takasaki Ion Accelerators for Advanced Radiation Application (TIARA) of JAEA-Takasaki for those over 20 MeV. At FRS, monoenergetic neutrons are generated by using proton or deuteron beam from a 4 MV Van-de-Graaff (Pelletron) accelerator. Up until the present, developments of the 8, 144, 250, 565 keV, 5.0 and 14.8 MeV fields have been completed. As procedure for the development, measurement of neutron energy spectrum, peak energy and reference fluence, development of monitoring scheme for neutron fluence and establishment of the traceability on neutron fluence to the primary standards were achieved. At TIARA, three neutron fields of 45, 60 and 75 MeV are planned to be established. Quasi-monoenergetic neutrons are generated from 7Li(p,n)7Be reaction by using proton beam from an AVF cyclotron, and led into an irradiation room through a cylindrical collimator, 3 m in thickness. Evaluation of the characteristics of the fields needed for the development as the standard calibration fields is in progress now.Keywords: neutron calibration fieldacceleratorPelletroncyclotronmonoenergetic neutronquasimonoenergetic neutronFRSTIARA
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