Resumen de Simulation of the 2E Technique on neutron multiplicity measurement as a function of fragment mass in spontaneous fission of ^(252)Cf (4 pages)
M. Montoya, A. Obregón, M. Álvarez
A Monte Carlo simulation algorithm to investigate the measurement of the average prompt neutron multiplicity as a function of pre-neutron mass, v ̄(A), for fragments from the spontaneous fission of ^(252)Cf is presented. The input data consist of experimental measurements of the kinetic energy and mass distributions obtained by Göök et al., and the values of v ̄(A) calculated using the FIFRELIN model by Piau et al., v ̄_(th)(A). We analyze the output curve, v ̄_(sim)(A), obtained by simulation of the 2E technique, which should ideally match v ̄_(th)(A). However, we find that νsim(A) exhibits a maximum value at A≈122, close to mass symmetry, while v ̄_(th)(A) has a maximum at A≈118. Additionally, we observe that v ̄__(sim)(A) > v ̄__(th)(A) for A< 90 and A> 169, respectively. We attribute this discrepancy to inaccuracies in the relationship between provisional mass and the pre-neutron mass used in the 2E technique for data processing in each fission event.
