Speaker
Description
Nuclear Mass and Fission-Fragment Studies based on the
FRDM and FRLDM Models.
Peter Möller
Department of Mathematical Physics, Lund Institute of Technology,
Box 118, SE - 22100 Lund, Sweden
The latest FRDM and FRLDM global mass models were finalized in 2012 and pub-
lished in 2016[1]. We investigate how the masses in the tables agree with subse-
quently measured masses. The FRLDM model has been extensively applied to stud-
ies of nuclear fission [2]. We comment on what those results indicate about possible
additional observable elements beyond Z = 118. Furthermore, by implementing a
random walk on the calculated five-dimensional potential-energy surfaces (the Brow-
nian Shape Motion (BSM) model) fission-fragment mass and charge distributions are
obtained [3, 4]. In its usual and historical formulation the fission potential-energy-
model energies do not exhibit any properties of the emerging nascent fragments so
no odd-even staggering in calculated fission-fragment charge distributions appears.
We discuss some tweaks to the potential-energy and the BSM models that allow the
modeling of odd-even staggering and the calculations of isotopic yields Y (Z, N) [5].
We compare the calculations to recent, better-than-one-u resolution, experimental
data.
References
[1] P. Möller, A. J. Sierk, T. Ichikawa, and H. Sagawa, Atomic Data and Nu-
clear Data Tables 109–110 (2016) 1.
[2] P. Möller, A. J. Sierk, T. Ichikawa, A. Iwamoto, R. Bengtsson, H. Uhrenholt,
and S. Åberg, Phys. Rev. C 79 (2009) 064304.
[3] J. Randrup and P. Möller, Phys. Rev. Lett. 106 (2011) 132503.
[4] J. Randrup and P. Möller, Phys. Rev. C 88 (2013) 064606.
[5] P. Möller and T. Ichikawa, Eur. Phys. J. A 51 (2015) 173.
| Type of contribution | |
|---|---|
| Are you a student or postdoc? | no |
