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Application of fission track detectors to californium‐252 neutron dosimetry in tissue near the radiation source
Author(s) -
Oswald Richard A.,
Lanzl Lawrence H.,
Rozenfeld Martin
Publication year - 1981
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 - 10.1118/1.594874
Subject(s) - californium , dosimetry , neutron , imaging phantom , nuclear medicine , fission , neutron source , nuclear physics , physics , radiochemistry , materials science , chemistry , medicine
Fission track detectors were applied to a unique problem in neutron dosimetry. Measurements of neutron doses were required at locations within a tumor of 1 cm diameter implanted on the back of a mouse and surrounded by a square array of four 252 Cf medical sources. Measurements made in a tissue‐equivalent mouse phantom showed that the neutron dose rate to the center of the tumor was 2.18 rads μ g −1 h −1 ±8.4%. The spatial variation of neutron dose to the tumor ranged from 1.88 to 2.55 rads μ g −1 h −1 . These measurements agree with calculated values of neutron dose to those locations in the phantom. Fission track detectors have been found to be a reliable tool for neutron dosimetry for geometries in which one wishes to know neutron dose values which may vary considerably over distances of 1 cm or less.