Published April 17, 2009 | Version v1
Journal article Metadata-only

Measurement of the 60Fe(n,γ)61Fe Cross Section at Stellar Temperatures

Creators

  • 1. University of Notre Dame, Department of Physics, Notre Dame, Indiana (United States)
  • 2. GSI Darmstadt, Planckstrasse 1, 64291 Darmstadt (Germany)
  • 3. Laboratory for Environmental and Radiochemistry, PSI, 5232 Villigen PSI (Switzerland)
  • 4. Forschungszentrum Karlsruhe, Institut fuer Kernphysik, Postfach 3640, D-76021 Karlsruhe (Germany)
  • 5. University of Lodz (Poland)
  • 6. Keele University, Keele, Staffordshire ST5 5BG (United Kingdom)

Description

Observations of galactic γ-ray activity have challenged the current understanding of nucleosynthesis in massive stars. Recent measurements of 60Fe abundances relative to 26Alg have underscored the need for accurate nuclear information concerning the stellar production of 60Fe. In light of this motivation, a first measurement of the stellar 60Fe(n,γ)61Fe cross section, the predominant destruction mechanism of 60Fe, has been performed by activation at the Karlsruhe Van de Graaff accelerator. Results show a Maxwellian averaged cross section at kT=25 keV of 9.9±1.4(stat)2.8(syst)mbarn, a significant reduction in uncertainty with respect to existing theoretical discrepancies. This result will serve to significantly constrain models of 60Fe nucleosynthesis in massive stars

Additional details

Identifiers

DOI
10.1103/PhysRevLett.102.151101;

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
102
Journal Issue
15
Journal Page Range
p. 151101-151101.4
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40054573
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
ABUNDANCE; ALUMINIUM 26; CROSS SECTIONS; GAMMA RADIATION; IRON 60; IRON 61; KEV RANGE 10-100; NEUTRON REACTIONS; NUCLEOSYNTHESIS; STARS; TEMPERATURE MEASUREMENT; VAN DE GRAAFF ACCELERATORS
Descriptors DEC
ACCELERATORS; ALUMINIUM ISOTOPES; BARYON REACTIONS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; ELECTROMAGNETIC RADIATION; ELECTROSTATIC ACCELERATORS; ENERGY RANGE; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HADRON REACTIONS; INTERMEDIATE MASS NUCLEI; IONIZING RADIATIONS; IRON ISOTOPES; ISOTOPES; KEV RANGE; LIGHT NUCLEI; MINUTES LIVING RADIOISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; ODD-ODD NUCLEI; RADIATIONS; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; SYNTHESIS; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
(c) 2009 The American Physical Society