Abstract

Photoneutron spectra produced from thin targets bombarded with 2.04 GeV electrons were measured in the range from 9 MeV to 300 MeV by using the time of flight technique. The measurements were carried out for thin C, Al, Cu, Sn, and Pb targets at a fixed angle of 900 to the beam direction. In this data reduction a removal cross-section was newly calculated for compensating the effect of the Pb attenuator which was set to suppress γ-flash signal. The double differential yields per incident electron were obtained from the spectra as a function of the mass number of target elements. For neutron energies larger than 20 MeV the yields decreased with higher mass number of the target, which was consistent with other authors’ published results.

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