Influence of nuclear physics inputs and astrophysical conditions on the Th/U chronometer
Date
2009
Authors
Niu Z.
Sun B.
Meng J.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The productions of thorium and uranium are key ingredients in r-process nucleo-cosmochronology. With the combination of improved nuclear and stellar data, we have made a detailed investigation of the r-process abundance pattern in the very metal-poor halo stars based on the classical r-process approach. It is found that the results are almost independent of specified simulations to observed abundances. The influence from nuclear mass uncertainties on a Th/U chronometer can approach 2 Gyr. Moreover, the ages of the metal-poor stars HE 1523-0901, CS 31082-001, and BD +17°3248 are determined as 11.8±3.7, 13.5±2.9, and 10.9±2.9 Gyr, respectively. The results can serve as an independent check for age estimates of the Universe. © 2009 The American Physical Society.
Description
Keywords
Citation
Physical Review C - Nuclear Physics
80
6
80
6