r-process in Type II supernovae and the role of direct capture

Journal Article · Tue Jun 01 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3455940· OSTI ID:21362113

Otsuki, K ^[1]; Burrows, A ^[2]; Martinez-Pinedo, G; Typel, S; Langanke, K ^[3]; Matos, M ^[4]

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1. Hokkaido University, N10W8, Kita, Sapporo, Hokkaido, Japan 060-0810 (Japan)
2. Princeton University, Princeton, NJ 08544 (United States)
3. GSI, Planckstrasse 1, 64291 Darmstadt (Germany)
4. Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)

We have calculated r-process nucleosynthesis based on acoustic wave driven supernova simulation. The environment includes extremely high entropy cases which has not been studied in previous studies. Plenty of actinide and third peak elements are formed in an averaged abundance, while elements around the first and second peaks are overproduced. We also studied the effect of direct capture in r-process. The direct capture furthers r-process and make freeze out earlier. It will change the final abundance drastically. We recalculated r-process nucleosynthesis of the simulation considering the direct capture reaction. While we could not see a significant difference in averaged abundances, significant differences appeared in several individual yields.

• OSTI ID: 21362113
• Journal Information: AIP Conference Proceedings, Vol. 1238, Issue 1; Conference: 7. Tours symposium on nuclear physics and astrophysics, Kobe (Japan), 16-20 Nov 2009; Other Information: DOI: 10.1063/1.3455940; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
ATOMIC NUMBER
CAPTURE
ENTROPY
FISSION YIELD
FREEZING OUT
NEUTRON SOURCES
NUCLEOSYNTHESIS
R PROCESS
SIMULATION
SOUND WAVES
SUPERNOVAE
BINARY STARS
ERUPTIVE VARIABLE STARS
EVOLUTION
NUCLEAR REACTION YIELD
PARTICLE SOURCES
PHYSICAL PROPERTIES
RADIATION SOURCES
SEPARATION PROCESSES
STAR EVOLUTION
STARS
SYNTHESIS
THERMODYNAMIC PROPERTIES
VARIABLE STARS
YIELDS