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Controllability of depth dose distribution for neutron capture therapy at the Heavy Water Neutron Irradiation Facility of Kyoto University Research Reactor
Author(s) -
Sakurai Yoshinori,
Kobayashi Tooru
Publication year - 2002
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1509445
Subject(s) - neutron temperature , neutron moderator , neutron , dosimeter , irradiation , materials science , heavy water , research reactor , dosimetry , neutron capture , beryllium oxide , radiochemistry , nuclear physics , beryllium , neutron cross section , radiation , physics , chemistry , nuclear medicine , medicine , deuterium
The updating construction of the Heavy Water Neutron Irradiation Facility of the Kyoto University Research Reactor has been performed from November 1995 to March 1996 mainly for the improvement in neutron capture therapy. On the performance, the neutron irradiation modes with the variable energy spectra from almost pure thermal to epi‐thermal neutrons became available by the control of the heavy‐water thickness in the spectrum shifter and by the open‐and‐close of the cadmium and boral thermal neutron filters. The depth distributions of thermal, epi‐thermal and fast neutron fluxes were measured by activation method using gold and indium, and the depth distributions of gamma‐ray absorbed dose rate were measured using thermo‐luminescent dosimeter of beryllium oxide for the several irradiation modes. From these measured data, the controllability of the depth dose distribution using the spectrum shifter and the thermal neutron filters was confirmed.