Articles written in Pramana – Journal of Physics
Volume 78 Issue 3 March 2012 pp 493-498 Brief Report
Fission fragments and other charged particles leave tracks of permanent damage in most of the insulating solids. Damage track detectors are useful for personal dosimeters and for ﬂux/dose determination of high-energy particles from accelerators or cosmic rays. A detector that has its principal response at nucleon energy above 50 MeV is provided by the ﬁssion of Bi-209. Neutrons produce the largest percentage of hadron dose in most high-energy radiation ﬁelds. In these ﬁelds, the neutron spectrum is typically formed by low-energy neutrons (evaporation spectrum) and high-energy neutrons (knock-on spectrum). We used Bi-ﬁssion detectors to measure neutron peak ﬂuence and compared the result with the calculated value of neutron peak ﬂuence. For the exposure to 100 MeV we have used the iThemba Facility in South Africa.
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