Abstract
The (n, 2n) reaction cross section was measured for 93Nb, 197Au and 238U with fission-neutron spectrum from 252Cf sources. The cross-section dependence on the asymmetry term N − Z A (where N, Z and A are the nucleus neutron, proton and mass numbers) was investigated and found to be an exponential growth. The mathematical function describing σ n,2 n = f(N − Z A ) is dependent on the incoming neutron energy. The function at fission spectrum is of the shape e x − 1 while at 14–15 MeV it has the shape of 1 − e −x (where x stands for N − Z A ) . Looking for an analogy between the asymmetry term dependence and energy dependence, a similar change occurs in the energy-dependent cross section near threshold.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
