The s-process branching at W-185
Sonnabend, K., Mohr, P., Vogt, K., Zilges, A., Mengoni, A., Rauscher, T., Beer, H., Kappeler, F. and Gallino, R.
(2003)
The s-process branching at W-185.
The Astrophysical Journal (1).
pp. 506-513.
ISSN 0004-637X
The neutron capture cross section of the unstable nucleus W-185 has been derived from experimental photoactivation data of the inverse reaction W-186(gamma, n) W-185. The new result of sigma = 687 +/- 110 mbarn confirms the theoretically predicted neutron capture cross section of W-185 of sigma approximate to 700 mbarn at kT = 30 keV. A neutron density in the classical s-process of n(n) = (3.8(-0.9)(+1.1)) x 10(8) cm(-3) is derived from the new data for the W-185 branching. In a stellar s-process model, one finds a significant overproduction of the residual s-only nucleus Os-186.
| Item Type | Article |
|---|---|
| Keywords | GAMMA-PROCESS; STATISTICAL-MODEL CALCULATIONS; R-PROCESS; PHOTONEUTRON CROSS-SECTIONS; methods : laboratory; NUCLEAR-LEVEL DENSITY; ASTROPHYSICAL REACTION-RATES; nuclear reactions, nucleosynthesis, abundances; NUCLEOSYNTHESIS; HALF-LIVES; NEUTRON-CAPTURE; ASYMPTOTIC GIANT BRANCH |
| Date Deposited | 29 May 2025 09:06 |
| Last Modified | 29 May 2025 09:06 |