2025/02/23 by P. Möller, Möller, Peter, C. Schmitt +1
Physics and Astronomy · #Nuclear physics research studies #Astronomical and nuclear sciences #Nuclear Physics and Applications
paper · pdf · doi:10.48550/arxiv.2502.16539
Moller and Randrup presented a comprehensive calculation, based on the Brownian shape motion (BSM) method, of fission-fragment charge distributions [Phys. Rev. C 91 (2015) 044316 ] which obtained that ``a new region of asymmetry'' appeared for approximately 95 ≤ N ≤ 115 and 75 ≤ Z ≤ 94 . Available experimental results at the time, except for the observation of symmetric fission of 187Ir by Itkis et al. [Yad. Fiz. 52 (1990) 944], agreed with these predictions apart for minor differences in the transition regions between predicted symmetric and asymmetric fission. It was argued [Phys. Rev. C 91 (2015) 044316 ] that the inaccurate results for 187Ir were related to inaccuracies in the calculated potential-energy surface and that such inaccuracies are related to the (in)accuracies of the calculated ground-state masses for the corresponding mass splits. We present here more detailed discussions and investigate if differences between the fission-fragment mass yields presented in [Phys. Rev. C 91 (2015) 044316 ] and experiment can occur in other regions of fissioning nuclei.