A measurement of the La-139 capture cross section and a study of the s-process at magic neutron number 82

Details A measurement of the La-139 capture cross section and a study of the s-process at magic neutron number 82 A measurement of the La-139 capture cross section and a study of the s-process at magic neutron number 82

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...162..330b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 162, no. 1-2, July 1986, p. 330-332.

Astronomy and Astrophysics

Astrophysics

2

Absorption Cross Sections, Lanthanum Isotopes, Meteoritic Composition, Neutrons, Nuclear Capture, Abundance, Flux Quantization, Gamma Rays, Neutron Irradiation, Nuclear Fusion

Scientific paper

The Maxwellian averaged neutron capture cross section of 139La has been measured at kT = 25 keV to be 44.1±2.9 mb by means of the activation technique. A study of the precipice of the σN(A) curve at magic neutron shell 82 using the new cross section was carried out. The average time integrated neutron flux τ0 was found to be τ0 = (0.304±0.013)mb-1 at kT = 30 keV and an s-process abundance of 139La of 0.33±0.03 [Si ≡ 106] was calculated.

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