Isobaric analog impurities from neutron capture and transmission by magnesium

Journal Article · Fri Oct 01 04:00:00 EDT 1976 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.14.1328· OSTI ID:7261508

Weigmann, H; Macklin, R L; Harvey, J A

Resonance neutron interactions with the stable isotopes of magnesium were measured at the Oak Ridge Electron Linear Accelerator time-of-flight facility. The transmission of a natural metal sample (78.7% /sup 24/Mg) was measured at 200 m, and capture by natural metal and by enriched isotope samples was measured at 40 m. Twenty-six resonances in /sup 24/Mg + n up to 1.8 MeV were fitted with Breit--Wigner multilevel parameters. The data were sufficient to assign spin and parity to 19 of these. The capture data were analyzed for resonances up to 850 keV for /sup 24/Mg + n, 265 keV for /sup 25/Mg + n (17/sup +/ resonances), and 440 keV for /sup 26/Mg + n (4 resonances). Average capture at stellar interior temperatures was calculated. The /sup 24/Mg + n data serve to assess the isospin impurities in three isobaric analog states. Three other states exhibit reduced neutron widths, each several percent of the Wigner limit, which may be understood in terms of simple shell model configurations. (AIP)

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 7261508
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 14:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METALS
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BREIT-WIGNER FORMULA
CAPTURE
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
HADRON REACTIONS
HADRONS
ISOBARIC ANALOGS
ISOSPIN
ISOTOPES
LIGHT NUCLEI
MAGNESIUM
MAGNESIUM 24 TARGET
MAGNESIUM 25
MAGNESIUM 25 TARGET
MAGNESIUM 26
MAGNESIUM 26 TARGET
MAGNESIUM 27
MAGNESIUM ISOTOPES
MATHEMATICAL MODELS
METALS
MINUTES LIVING RADIOISOTOPES
NEUTRAL-PARTICLE TRANSPORT
NEUTRON REACTIONS
NEUTRON TRANSPORT
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PARITY
PARTICLE PROPERTIES
RADIATION TRANSPORT
RADIOISOTOPES
RESONANCE
SHELL MODELS
SPIN
STABLE ISOTOPES
STARS
TARGETS
TRANSMISSION