Open Access
| Issue |
ND 2007
2007
|
|
|---|---|---|
| Article Number | 082 | |
| Number of page(s) | 4 | |
| Section | Evaluation of covariance matrices | |
| DOI | https://doi.org/10.1051/ndata:07728 | |
| Published online | 17 June 2008 | |
International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07728
1 Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195, Japan
2 Joint Institute for Energy and Nuclear Research, 220109 Minsk-Sosny, Beralus
chiba.satoshi@jaea.go.jp
Published online: 21 May 2008
© CEA 2008
DOI: 10.1051/ndata:07728
Systematics and uncertainties of Hamiltonian parameters of soft-rotator model for actinides and their implications for nuclear data calculations
S. Chiba1, H. Koura1, T. Maruyama1, S. Kunieda1 and E. Sh. Soukhovitskii21 Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195, Japan
2 Joint Institute for Energy and Nuclear Research, 220109 Minsk-Sosny, Beralus
chiba.satoshi@jaea.go.jp
Published online: 21 May 2008
Abstract
The collective low-lying levels of even-even actinides are analyzed in terms of the soft-rotator model (SRM), and best fit parameters of SRM Hamiltonian are deduced for 19 nuclides. Systematics of these parameters are then obtained as a function of the ground-state quadrupole deformation. It was found that there is a possibility of extending such a systematics to include the fission product nuclei. Furthermore, we propose a method to estimate the covariance of the SRM parameters and its impact on the cross sections calculated with them quantitatively. It is shown that low-energy observables are more sensitive to the uncertainties in the SRM parameters, therefore, sensitive to the collective structure effects.
© CEA 2008