s-process branching at 185W revised
Astrophysics
2007-05-23 v1 Nuclear Experiment
Abstract
The neutron capture cross section of the unstable s-process branching nucleus 185W has been derived from experimental data of the inverse 186W(g,n)185W photodisintegration taken with monochromatic photon beams from laser Compton scattering. The result of sigma = 553 +- 60 mb at kT = 30 keV leads to a relatively high effective neutron density in the classical s-process of N_n = 4.7 \times 10^8 cm^-3. A realistic model for the s-process in thermally pulsing AGB stars overestimates the abundance of 186Os significantly because of the relatively small neutron capture cross section of 185W.
Cite
@article{arxiv.astro-ph/0409642,
title = {s-process branching at 185W revised},
author = {P. Mohr and T. Shizuma and H. Ueda and S. Goko and A. Makinaga and K. Y. Hara and T. Hayakawa and Y. -W. Lui and H. Ohgaki and H. Utsunomiya},
journal= {arXiv preprint arXiv:astro-ph/0409642},
year = {2007}
}
Comments
10 pages, 3 figures