Abstract
view Abstract Citations (26) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Measurement of the 76Se( n, gamma ) Capture Cross Section and Phenomenological s-Process Studies: The Weak Component Beer, Hermann ; Walter, G. ; Kaeppeler, F. Abstract The excitation function of the reaction Se-76(n, gamma) has been measured in the energy range from 3 to 200 keV neutron energy. The Maxwellian-averaged capture cross section versus thermal energy kT has been calculated. For kT = 30 keV a value of 164 +/- 8 mbarn has been derived. The weak component s-process in the mass range A = 56 to 90 has been studied. Two models for the weak component, an s-process with an exponential exposure distribution and an s-process with a distinct single exposure, have been discussed. For a consistent description of the abundances of the weak component s-process under realistic stellar conditions a considerable part of the material produced during core He-burning in massive stars must be reprocessed by subsequent C-burning. The solar Kr-abundance was determined to be (47 +/- 5) 10 exp 6 Si. Publication: The Astrophysical Journal Pub Date: April 1992 DOI: 10.1086/171251 Bibcode: 1992ApJ...389..784B Keywords: Abundance; Neutron Scattering; Nuclear Fusion; Selenium Isotopes; Van De Graaff Accelerators; Massive Stars; Maxwell Equation; Stellar Composition; Thermal Energy; Time Of Flight Spectrometers; Nuclear and High-Energy Physics; NUCLEAR REACTIONS; NUCLEOSYNTHESIS; ABUNDANCES; SUN: ABUNDANCES full text sources ADS |
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