Neutron capture cross sections and solar abundances of /sup 160,161/Dy, /sup 170,171/Yb, /sup 175,176/Lu, and /sup 176,177/Hf have been measured

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.30.464· OSTI ID:6543947

Beer, H; Walter, G; Macklin, R L; Patchett, P J

The neutron capture cross sections and solar abundances of /sup 160,161/Dy, /sup 170,171/Yb, /sup 175,176/Lu, and /sup 176,177/Hf have been measured. With this data base s-process studies have been carried out to determine the s-process neutron density and temperature and to investigate the s-process nucleosynthesis of the /sup 176/Lu clock. From various branchings the neutron density was found to be (0.8--1.8) x 10/sup 8/ neutrons per cm/sup 3/ and the temperature kT to be 18--28 keV. On the basis of the present data, /sup 176/Lu proved not to be applicable as a cosmic clock because of the temperature sensitivity of the /sup 176/Lu half-life but can be used instead as a stellar thermometer. Constraints for the s-process temperature (kT = 20--28 keV) were found to be in good agreement with the investigated branchings.

• Research Organization: Kernforschungszentrum Karlsruhe, Institut fuer Kernphysik III, D-7500 Karlsruhe, Federal Republic of Germany
• OSTI ID: 6543947
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 30:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
651822 -- Nuclear Properties & Reactions
A=150-189
Experimental-- Radioactive Decay-- (-1987)
651825 -- Nuclear Properties & Reactions
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Experimental-- Nuclear Reactions & Scattering-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABUNDANCE
ATMOSPHERES
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPTURE
CROSS SECTIONS
DATA
DYSPROSIUM 160 TARGET
DYSPROSIUM 161 TARGET
ELECTROMAGNETIC RADIATION
ENERGY RANGE
EXPERIMENTAL DATA
GAMMA RADIATION
HADRON REACTIONS
HAFNIUM 176 TARGET
HAFNIUM 177 TARGET
HALF-LIFE
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOTOPES
KEV RANGE
LUTETIUM 175 TARGET
LUTETIUM 176
LUTETIUM 176 TARGET
LUTETIUM ISOTOPES
MAIN SEQUENCE STARS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEOSYNTHESIS
NUMERICAL DATA
ODD-ODD NUCLEI
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
S PROCESS
SOLAR ATMOSPHERE
STAR EVOLUTION
STARS
SUN
SYNTHESIS
TARGETS
YEARS LIVING RADIOISOTOPES
YTTERBIUM 170 TARGET
YTTERBIUM 171 TARGET