## DIFFERENTIAL AND INTEGRAL STUDY FOR PB(N,2N) CROSS SECTIONDepartment of Nuclear Engineering, Tohoku UniversityAramaki-Aoba, Sendai 980, Japan In this papar we studied Pb(n,2n) reaction including neutron emission spectra from differential and integral aspects. New measurement have been done at 14.1 MeV, and compared with those by Takahashi et al. Theoretical calculation using the multistep Hauser-Feshbach theory with the preequilibrium process effect (GNASH code) which reproduced the experimental cross section rather satisfactorily. Deduced (n,2n) cross section was discussed in conjunction with our new lead shell transmission experiment for 14MeV neutrons. KEYWORDS: lead, 14MeV, (n,2n), cross section, differential, integral, lead shell, neutron multiplication factor |