Thermal-neutron scattering length and capture by sup 46 Ca

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.44.518· OSTI ID:5591164

Raman, S; Fernandez-Baca, J A; Moon, R M ^[1]; Lynn, J E ^[2]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (USA)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)

We have deduced the coherent scattering amplitude of {sup 46}Ca as 3.55{plus minus}0.21 fm by measuring the neutron-diffraction patterns of calcite enriched to 32% in {sup 46}Ca. We have employed this value in calculating the direct-capture cross sections of the primary electric-dipole {gamma} transitions in {sup 47}Ca using optical-model potentials with physically realistic parameters. The calculated cross sections agree reasonably well with measurements showing that thermal-neutron capture by {sup 46}Ca is controlled largely by a simple direct mechanism.

• DOE Contract Number: AC05-84OR21400; W-7405-ENG-36
• OSTI ID: 5591164
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 44:1; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
AMPLITUDES
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BINDING ENERGY
CALCIUM 46 TARGET
CALCIUM 47
CALCIUM ISOTOPES
CAPTURE
COHERENT SCATTERING
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
DIFFRACTION
DIMENSIONS
E1-TRANSITIONS
ELEMENTARY PARTICLES
ENERGY
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FERMIONS
HADRON REACTIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LENGTH
MATRIX ELEMENTS
MULTIPOLE TRANSITIONS
NEUTRON DIFFRACTION
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
OPTICAL MODELS
RADIOISOTOPES
SCATTERING
SCATTERING AMPLITUDES
SCATTERING LENGTHS
SPECTROSCOPIC FACTORS
TARGETS
THERMAL NEUTRONS