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Cluster nature and parity of the 9. 155 MeV state in /sup 15/N

Journal Article · · Phys. Rev., C; (United States)
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The lifetime of the 9.155 MeV J = 5/2 state in /sup 15/N has been measured to be < 13 fsec from a study of the /sup 12/C(/sup 7/Li,..cap alpha gamma..)/sup 15/N reaction at E/sub 7Li/ = 28 MeV. The ..gamma.. decay from the 9.155 MeV state to the 5.30 MeV 1/2/sup +/ state is established as E2 and thereby determines the parity of the 9.155 MeV state to be positive. Particle-gated ..gamma..-ray spectra from /sup 12/C(/sup 7/Li,..cap alpha gamma..) and /sup 12/C(/sup 6/Li,/sup 3/He..gamma..) reactions show that the 9.155 MeV state has a large triton cluster parentage. The other member of the unresolved doublet, the 9.152 MeV 3/2/sup -/ state, has a very small cluster parentage. These results are in disagreement with simple /sup 12/C + t interpretations of /sup 15/N but agree with weak coupling model calculations.
Research Organization:
Department of Physics, The Florida State University, Tallahassee, Florida 32306
OSTI ID:
6876778
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:5; ISSN PRVCA
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
CARBON 12 TARGET
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
DIRECT REACTIONS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
GAMMA SPECTRA
HEAVY ION REACTIONS
HELIUM 3
HELIUM ISOTOPES
ISOTOPES
LIFETIME
LIGHT NUCLEI
LITHIUM 6 REACTIONS
LITHIUM 7 REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MULTI-NUCLEON TRANSFER REACTIONS
NITROGEN 15
NITROGEN ISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
SHELL MODELS
SPECTRA
STABLE ISOTOPES
TARGETS
THREE-NUCLEON TRANSFER REACTIONS
TRANSFER REACTIONS
WEAK-COUPLING MODEL
WEAK-COUPLING MODEL ALPHA PARTICLES