Influence of nuclear physics inputs and astrophysical conditions on Th/U chronometer
Niu, Zhongming · Sun, Baohua · Meng, Jie
Original · EN
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 detailed investigations on 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 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 estimate of the universe.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.