Decays of high-lying states in /sup 12/C

Journal Article · Fri Feb 01 04:00:00 EST 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.334· OSTI ID:6105016

Neuschaefer, G H; Tabor, S L

States in /sup 12/C at 12.71, 16.11, 18.38, 19.55, and 20.62 MeV were populated strongly in the /sup 11/B(d,n)/sup 12/C reaction at a laboratory beam energy of 12 MeV. The charged-particle decays of these states were measured in coincidence with neutrons detected by time of flight techniques at 0/sup 0/ relative to the beam. Decay protons and ..cap alpha.. particles were detected and identified in a surface-barrier counter telescope placed at laboratory angles of 45/sup 0/, 60/sup 0/, 85/sup 0/, 110/sup 0/, and 135/sup 0/. Angular correlations and branching ratios were determined for the decay particles. The 19.55 MeV peak contains at least two states 300 keV apart with very different ..cap alpha.. and proton decay rates. An ..cap alpha.. decay branch to the ground state of /sup 8/Be indicates the presence of a natural parity state in the 18.38 MeV peak. Comparisons have been made between the measured angular correlations and calculations based on the /sup 12/C alignments predicted by the distorted-wave Born approximation.

• Research Organization: Department of Physics, Florida State University, Tallahassee, Florida 32306
• OSTI ID: 6105016
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
ANGULAR CORRELATION
ANGULAR DISTRIBUTION
BARYONS
BERYLLIUM 8
BERYLLIUM ISOTOPES
BORON 11 TARGET
BRANCHING RATIO
CARBON 12
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
CORRELATIONS
DECAY
DEUTERON REACTIONS
DIRECT REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PROTON EMISSION DECAY
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
STRIPPING
TARGETS
TIME-OF-FLIGHT METHOD
TRANSFER REACTIONS