18-21 MeV region of /sup 12/C populated by /sup 11/B(d,n)/sup 12/C at E/sub d/ = 10 and 12 MeV
The modified high resolution beam pulsing system at FSU has been used for neutron time of flight detection over relatively short flight paths (2m). This enabled a study of /sup 12/C using the (d,n) proton stripping reaction. In addition to the well known lower lying states three strong peaks, at 18.38 (Gamma = 0.350), 19.55 (Gamma = 0.575), 20.62 (Gamma = 0.525) MeV excitation, were seen in the measured energy angular distribution spectra. Each peak likely contains more than one state in /sup 12/C. Angular distributions were compared with distorted wave Born approximation calculations for particle unbound states. A coincidence experiment measured the branching ratios and angular correlations of the charged particle decays. The 19.55 MeV peak was clearly shown to be composed of at least two states with different proton and alpha decay strengths. The 18.38 and 20.62 MeV peaks were shown to contain states of natural parity. The angular correlations were compared to theoretical calculations for various angular momentum possibilities. The singles spectra of the present work most closely resemble those of intermediate energy proton inelastic scattering.
- Research Organization:
- Florida State Univ., Tallahassee (USA)
- OSTI ID:
- 5220640
- Country of Publication:
- United States
- Language:
- English
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A=6-19
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
ANGULAR DISTRIBUTION
BORN APPROXIMATION
BORON 11 TARGET
BRANCHING RATIO
CARBON 12
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
CORRELATIONS
COUNTING TECHNIQUES
DATA
DEUTERON REACTIONS
DIRECT REACTIONS
DISTRIBUTION
DWBA
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GAMMA SPECTRA
INFORMATION
ISOTOPES
LEVEL WIDTHS
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PARITY
PARTICLE PROPERTIES
SPECTRA
STABLE ISOTOPES
STRIPPING
TARGETS
TRANSFER REACTIONS