Experimental studies on the neutron emission spectrum and induced radioactivity of the 7Li(d,n) reaction in the 20–40 MeV region

To improve the data accuracy of the neutron emission spectrum of the 7Li(d,n) reaction and the radioactivity (7Be, 3H, etc.) accumulated in the 7Li target in IFMIF, we have measured the neutron emission spectrum and the radioactivity of 7Be induced in the lithium target for 25 MeV deuterons at the Tohoku University AVF cyclotron (K=110) facility. Neutron spectra were measured with the time-of-flight (TOF) method at four laboratory angles by using a beam swinger system and a well collimated TOF channel. Induced radioactivity was measured by detecting the gamma-rays from 7Be with a pure Ge detector. Experimental results are compared with other experimental data. The present result of neutron emission spectra are in qualitative agreement with other experimental data but that of 7Be production was much larger than expected by the recent codes. Measurement will be extended to several incident energies up to 40 MeV.