Simulation of the 2E Technique on neutron multiplicity measurement as a function of fragment mass in spontaneous fission of 252Cf

Montoya M.; Obregón A.; Alvarez M. · Revista Mexicana de Fisica (2024) · DOI: 10.31349/revmexfis.70.031201

Resumen

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 252Cf is presented. The input data consist of experimental measurements of the kinetic energy and mass distributions obtained by Göök et al., and the values ofV¯(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 thatV¯sim(A) exhibits a maximum value at A≈122, close to mass symmetry, whileV¯th(A) has a maximum at A≈118. Additionally, we observe thatV¯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. © (2024), (Sociedad Mexicana de Fisica). All Rights Reserved.

Instituciones: Universidad Nacional de Ingeniería