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Radiative transitions and isospin mixing in /sup 12/C

Journal Article · · Phys. Rev., C; (United States)
; ; ;
..gamma..-ray decays of the 12.7- and 16.1 MeV states of /sup 12/C are investigated in a coincidence study of the /sup 10/B(/sup 3/He,p..gamma..) reaction. We obtain GAMMA/sub ..gamma../ 0/GAMMA = (1.93 +- 0.12) %, GAMMA /sub ..gamma../ 1/GAMMA /sub ..gamma../ 0 = (15.0 +- 1.8) % and GAMMA/sub b//GAMMA = (97.8 +- 0.1) % for /sup 12/C(12.7), and GAMMA /sub ..gamma../ 1/GAMMA = (2.42 +- 0.29) x 10/sup -3/ for /sup 12/C(16.1). Relative ..gamma..-ray branching ratios of /sup 12/C(16.1) were measured using the E/sub p/ = 163 keV /sup 11/B(p,..gamma..) resonance. We find GAMMA /sub ..gamma../ 0/GAMMA /sub ..gamma../ 1 = (4.6 +- 0.7) %, GAMMA/sub ..gamma../(16.1 ..-->.. 9.6)/GAMMA /sub ..gamma../ 1 = (2.4 +- 0.4) %, and GAMMA/sub ..gamma../(16.1 +- 12.7)/GAMMA /sub ..gamma../ 1 = (1.46 +- 0.25) %. This information, together with existing data on M1 transitions and single nucleon transfer reactions, is used to determine the isospin mixing between the 12.7 and 15.1 MeV levels of /sup 12/C. A charge dependent matrix element of 110 +- 30 keV is deduced.
Research Organization:
University of Washington, Seattle, Washington 98915
OSTI ID:
7228634
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 15:2; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651323* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Energy Levels & Transitions-- (-1987)
651325 -- Nuclear Properties & Reactions
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Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BORON 10 TARGET
BORON 11 TARGET
BRANCHING RATIO
CAPTURE
CARBON 12
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
DIRECT REACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
GAMMA RADIATION
GAMMA SPECTRA
HADRON REACTIONS
HADRONS
HELIUM 3 REACTIONS
IONIZING RADIATIONS
ISOSPIN
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
LIGHT NUCLEI
MATRIX ELEMENTS
MULTI-NUCLEON TRANSFER REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PARTICLE PROPERTIES
PROTON REACTIONS
PROTONS
RADIATIONS
RESONANCE
SPECTRA
STABLE ISOTOPES
STRIPPING
TARGETS
TRANSFER REACTIONS
TWO-NUCLEON TRANSFER REACTIONS