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Determination of Neutron Beam Diameter in 3rd Horizontal Channel of Dalat Nuclear Reactor

Nguyen AS, Dang L and Ho HT

Neutron beam diameter (NBD) is a very important parameter in experimental nuclear in the nuclear research reactor. Accurate determination of the NBD is the best method, which makes an optimal sample size correctly, to reduce data analysis errors. To identify the NBD, we can use some methods: simulation by Monte-Carlo method, neutron imaging, and neutron activation analysis. In this report, we determined NBD of the 3rd horizontal channel of Dalat nuclear reactor that activated Gold foil. The results showed this method to be more quickly and correct results, and experimental material could reuse for another experiment.