Influence of light nuclei on neutrino-driven supernova outflows
Abstract
We study the composition of the outer layers of a protoneutron star and show that light nuclei are present in substantial amounts. The composition is dominated by nucleons, deuterons, tritons and alpha particles; 3He is present in smaller amounts. This composition can be studied in laboratory experiments with new neutron-rich radioactive beams that can reproduce similar densities and temperatures. After including the corresponding neutrino interactions, we demonstrate that light nuclei have a small impact on the average energy of the emitted electron neutrinos, but are significant for the average energy of antineutrinos. During the early post-explosion phase, the average energy of electron antineutrinos is slightly increased, while at later times during the protoneutron star cooling it is reduced by about 1 MeV. The consequences of these changes for nucleosynthesis in neutrino-driven supernova outflows are discussed.
Additional Information
©2008 The American Physical Society. (Received 24 May 2008; published 24 July 2008) A.A. acknowledges support by the Deutsche Forschungsgemeinschaft through contract SFB 634 "Nuclear structure, nuclear astrophysics and fundamental experiments at small momentum transfers at the S-DALINAC". The work of E.O. and A.S. is supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada. The work of H.-T.J. is supported by the Deutsche Forschungsgemeinschaft through the Transregional Collaborative Research Centers SFB/TR 27 "Neutrinos and Beyond" and SFB/TR 7 "Gravitational Wave Astronomy", and the Cluster of Excellence EXC 153 "Origin and Structure of the Universe" (http://www.universecluster.de). The work of C.J.H. is supported in part by DOE grant DE-FG02-87ER40365.Attached Files
Published - ARCprc08.pdf
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Additional details
- Eprint ID
- 11233
- Resolver ID
- CaltechAUTHORS:ARCprc08
- Deutsche Forschungsgemeinschaft
- SFB 634 "Nuclear structure, nuclear astrophysics and fundamental experiments at small momentum transfers at the S-DALINAC"
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- National Research Council of Canada
- Deutsche Forschungsgemeinschaft
- Transregional Collaborative Research Centers SFB/TR 27 "Neutrinos and Beyond"
- Deutsche Forschungsgemeinschaft
- SFB/TR 7 "Gravitational Wave Astronomy"
- Deutsche Forschungsgemeinschaft
- Cluster of Excellence EXC 153 "Origin and Structure of the Universe"
- Department of Energy
- DE-FG02-87ER40365
- Created
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2008-07-26Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field