Statistics – Computation
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387..258b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 387, March 1, 1992, p. 258-262.
Statistics
Computation
20
Absorption Cross Sections, Carbon 14, Nuclear Astrophysics, Stellar Temperature, Astronomical Spectroscopy, Computational Astrophysics, Nuclear Fusion
Scientific paper
A fast cyclic activation technique is used to determine the capture cross section of C-14. The measurements were carried out at the Karlsruhe 3.75-MV pulsed Van de Graaff accelerators using the 7Li(p, n) reaction close to the reaction threshold to generate neutrons with a distribution resembling a Maxwell spectrum of 25 keV. The activation sample consisted of 605 +/- 15 mg carbon powder enriched in C-14 by 89 percent. The C-14 capture cross section was measured relative to the Au-197 standard cross section. The activity produced by the neutron captures in the C-14 sample was counted with a high-resolution HPGe detector via the characteristic 5297.79 keV C-15 gamma-ray line. The C-14 capture cross section at 23.3 keV was found to be (1.72 +/- 0.43) microbarn.
Beer Hermann
Goerres Joachim
Kaeppeler Franz
Koehler Paul E.
Wiescher Michael
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