期刊
PHYSICAL REVIEW C
卷 95, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.95.014613
关键词
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资金
- Helmholtz International Center for FAIR
- Helmholtz Alliance Program of the Helmholtz Association [HA216/EMMI]
- GSI-TU Darmstadt Cooperation agreement
- BMBF [06DA70471, 06DA9040I, 06MT238]
- Helmholtz Association through the Nuclear Astrophysics Virtual Institute [VH-VI-417]
- DFG cluster of excellence Origin and Structure of the Universe
- US DOE [DE-FC02-07ER41457, DE-FG02-96ER40963, DE-FG02-08ER41533]
- Portuguese FCT [PTDC/FIS/103902/2008, FPA2012-32443]
- U.S. NSF [1415656]
- STFC [2014 STFC Nuclear Physics CG, ST/J000108/1, ST/P004598/1, ST/L005751/1, ST/I504967/1, ST/E500651/1, ST/L005670/1, ST/G000719/1, ST/G000727/1, ST/P003885/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L005751/1, ST/G000719/1, ST/P004598/1, 2014 STFC Nuclear Physics CG, ST/G000662/1, ST/G000727/1, ST/L005670/1, ST/P003885/1, ST/I504967/1, ST/E500651/1, ST/J000108/1, ST/I504967/1 NuSTAR] Funding Source: researchfish
- Fundação para a Ciência e a Tecnologia [PTDC/FIS/103902/2008] Funding Source: FCT
- Division Of Physics
- Direct For Mathematical & Physical Scien [1415656] Funding Source: National Science Foundation
With the (RB)-B-3-LAND setup at GSI we have measured exclusive relative-energy spectra of the Coulomb dissociation of C-18 at a projectile energy around 425A MeV on a lead target, which are needed to determine the radiative neutron-capture cross sections of C-17 into the ground state of C-18. Those data have been used to constrain theoretical calculations for transitions populating excited states in C-18. This allowed to derive the astrophysical cross section sigma(n gamma)*. accounting for the thermal population of C-17 target states in astrophysical scenarios. The experimentally verified capture rate is significantly lower than those of previously obtained Hauser-Feshbach estimations at temperatures T-9 <= 1 GK. Network simulations with updated neutron-capture rates and hydrodynamics according to the neutrino-driven wind model as well as the neutron-star merger scenario reveal no pronounced influence of neutron capture of C-17 on the production of second-and third-peak elements in contrast to earlier sensitivity studies.
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