Authors: Effat Assar Laleh Rafat Motavalli Hashem MiriHakimabad Alireza VejdaniNoghreiyan
Publish Date: 2013/04/23
Volume: 298, Issue: 1, Pages: 375-381
Abstract
Personal safety issue is one of the major limitations in landmine detection by nuclear techniques In this paper the dose rate received by the operator of different handheld landmine detection systems using the neutron backscattering method was investigated Monte Carlo method was used to simulate a computational model of the body instruments with different shielding configurations and soil with various moisture contents The effective dose received by the different organs of the operator has been estimated by using two different approximation methods including average equivalent dose and dose equivalent assessment The results obtained by these two methods were compared The common results showed that the operator dose rate depends on the facility shielding soil moisture level and sourcetooperator distance Also although the absorbed dose received by most organs generally decreases as a function of source to operator distance for some organs such as kidneys and lungs it firstly increases when sourcetooperator distance increases up to 07–12 m and after that the absorbed dose decreases Furthermore the results showed that the effective dose received by the operator has its maximum value when the source to operator distance is 060 m
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