Radiative neutron capture on sup 3 He

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.42.830· OSTI ID:6421167

Carlson, J ^[1]; Riska, D O ^[2]; Schiavilla, R ^[3]; Wiringa, R B ^[4]

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1. Theory Division, Los Alamos National Laboratory, Los Alamos, NM (USA)
2. Department of Physics, University of Helsinki, 00170 Helsinki (Finland)
3. Continuous Electron Beam Accelerator Facility, Newport News, VA (USA)
4. Physics Division, Argonne National Laboratory, Argonne, IL (USA)

The thermal neutron cross section for the reaction {ital n}+{sup 3}He{r arrow}{sup 4}He+{gamma} is calculated with the Monte Carlo method from realistic variational wave functions obtained for the Argonne {ital v}{sub 14} two-nucleon and Urbana VII three-nucleon interaction models. The calculated cross section is found to be almost entirely due to exchange currents. With the exchange current operator constructed so as to satisfy the continuity equation with the Argonne {ital v}{sub 14} interaction, the calculated cross section is 71 {mu}b, which is close to the empirical value 54{plus minus}6 {mu}b. The less certainly known contributions from model-dependent exchange current mechanisms increase the predicted value to about 112 {mu}b. The calculated cross section depends strongly on the {ital n}+{sup 3}He scattering length, varying between 140 and 71 {mu}b as the scattering length is changed from 3.25 to 3.75 fm.

• OSTI ID: 6421167
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 42:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
CAPTURE
CROSS SECTIONS
DATA
DIMENSIONS
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
HADRON REACTIONS
HADRONS
HELIUM 3 TARGET
HELIUM 4
HELIUM ISOTOPES
IMPULSE APPROXIMATION
INFORMATION
ISOTOPES
LENGTH
LIGHT NUCLEI
MONTE CARLO METHOD
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
SCATTERING LENGTHS
STABLE ISOTOPES
TARGETS
THEORETICAL DATA
THERMAL NEUTRONS