landmine-detection systems have been studied widely, but the protection against radiation in these studies has rarely been studied. Systems dosimetry due to the neutron source is important. In this paper, the dose rate received by an operator of a hand held instrument for landmine detection is analyzed using a computational phantom model with Monte Carlo simulation for different source-to-operator distances. although the effective dose decreases as a function of source-to-operator distance, the absorbed to some organs e.g. the lungs,kidney and stomach, increases with source-to-operator distances, up to 60-100 cm. Also according to the annual dose limits the number of days with assuming 6 hours in a day that the person can work in a year, is calculated.

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