Neutron resonance parameters and thermal-neutron capture by [sup 43]Ca

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.48.553· OSTI ID:6243267

Moxon, M C; Harvey, J A; Raman, S ^[1]; Lynn, J E ^[2]; Ratynski, W ^[3]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Soltan Institute of Nuclear Physics, Otwock-Swierk (Poland)

Neutron transmission measurements have been carried out on a small sample (205.9 mg) of CaCO[sub 3] with a [sup 43]Ca enrichment of 49.1%. The parameters (spins and neutron widths) of eight resonances below the neutron energy of 20 keV have been determined. This information was combined with a previously measured thermal-neutron coherent scattering length to deduce the separate scattering lengths for the two spin states present in [ital s]-wave scattering. These values were used to calculate the direct (potential + valence) capture cross sections of the primary electric-dipole gamma transitions in [sup 44]Ca using optical-model potentials with physically realistic parameters. For those states below 6.2 MeV for which the [ital l]=1 ([ital d],[ital p]) spectroscopic factors are known, the experimental cross sections are consistent with our current understanding of the direct and compound-nuclear capture processes. The processes leading to states above 6.2 MeV require further experimental and theoretical studies.

• DOE Contract Number: AC05-84OR21400; W-7405-ENG-36
• OSTI ID: 6243267
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 48:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
663540 -- Nuclear Mass Ranges-- A=39-58-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
CALCIUM 43 TARGET
CAPTURE
CROSS SECTIONS
DIMENSIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON REACTIONS
HADRONS
INTEGRAL CROSS SECTIONS
LENGTH
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
SCATTERING LENGTHS
TARGETS
THERMAL NEUTRONS