Technical study on cross section measurement with Al activation(In Chinese)

The method of Al activation relative measurement of cross section has been studied.The cross sections of ~(27)Al(n,α)~(24 )Na have been measured in 13.4 MeV to 14.7 MeV.The PD-300 accelerator offered D-T neutron source.The distance from sample to Tritium target is 20 cm.It spent 5 h to radiate sample with neutron.The intensity of neutron source is monitored by theα-particles from the T(d,n) ~4He reaction.The induced neutron energy is determined using ratio of Nb(n,2n) and Zr(n,2n) cross section.The activated gamma ray is measured using GEM60P HPGe detector.The results of ~(27)Al(n,a)~(24)Na cross sections are compared with the nuclear data standard,and the deviation is less than 1%.It showed that the method of Al activation relative measurement of cross section is credible.

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