Some limitations of detailed balance for inverse reaction calculations in the astrophysical p-process

Conference · Wed Dec 05 00:00:00 EST 1990

OSTI ID:6284923

Gardner, D G; Gardner, M A

p-Process modeling of some rare but stable proton-rich nuclei requires knowledge of a variety of neutron, charged particle, and photonuclear reaction rates at temperatures of 2 to 3 {times} 10{sup 9} {degrees}K. Detailed balance is usually invoked to obtain the stellar photonuclear rates, in spite of a number of well-known constraints. In this work we attempt to calculate directly the stellar rates for ({gamma},n) and ({gamma},{alpha}) reactions on {sup 151}Eu. These are compared with stellar rates obtained from detailed balance, using the same input parameters for the stellar (n,{gamma}) and ({alpha},{gamma}) reactions on {sup 150}Eu and {sup 147}Pm, respectively. The two methods yielded somewhat different results, which will be discussed along with some sensitivity studies. 16 refs., 7 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6284923
• Report Number(s): UCRL-JC-104716; CONF-901057-28; ON: DE91007258
• Resource Relation: Conference: 7. international symposium on capture gamma-ray spectroscopy and related topics, Pacific Grove, CA (USA), 14-19 Oct 1990
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EUROPIUM 150
NEUTRON REACTIONS
EUROPIUM 151 TARGET
PHOTONUCLEAR REACTIONS
PROMETHIUM 147 TARGET
ALPHA REACTIONS
ASTROPHYSICS
CROSS SECTIONS
NUCLEOSYNTHESIS
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
ELECTRON CAPTURE RADIOISOTOPES
EUROPIUM ISOTOPES
HADRON REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIAT
ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-ODD NUCLEI
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SYNTHESIS
TARGETS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources
651820 - Nuclear Properties & Reactions
A=150-189
Experimental
651720 - Nuclear Properties & Reactions
A=90-149
Experimental