Improving the uniformity of the gamma production rate distribution with depth in a large biological sample for an IVNAA facility

Nuclear Technology and Radiation Protection

关键词: gamma production;    water phantom;    MCNPX code;    activation analysis;   

DOI  :  10.2298/NTRP0902119H

来源: DOAJ

【 摘 要 】

The design studies related to a prompt γ-rays in vivo neutron activation analysis facility are described. The designs were based on two neutron sources: 252Cf and 241Am-Be, four collimator materials: polyethylene, 5% boric-acid doped polyethylene, graphite, and the heavy water, two collimator shapes: pyramidal and rectangular, and two configurations: unilateral and bilateral. The aim of this work was improving the uniformity of the gamma production rate distribution with depth in a large biological sample. For the sample, a water phantom measuring 32cm x 16cm x 100cm was simulated. The simulations were performed by MCNPX 2.4.0 Monte Carlo code. This study recommends the prompt γ-rays IVNAA facility in the bilateral configuration with graphite as a collimator material and 241Am-Be as neutron source.

【 授权许可】

Unknown