Spectroscopy of high spin states in /sup 16/O and /sup 20/Ne using the (/sup 12/C,/sup 8/Be)(. cap alpha. /sub 0/) reaction

Journal Article · Wed Oct 31 23:00:00 EST 1979 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.20.1743· OSTI ID:5937073

Sanders, S J; Martz, L M; Parker, P D

Spins, parities, and ..cap alpha../sub 0/-decay branching ratios have been determined for a number of states in /sup 16/O and /sup 20/Ne using the /sup 12/C(/sup 12/C,/sup 8/Be)/sup 16/O* (..cap alpha../sub 0/)/sup 12/C and /sup 16/O(/sup 12/C,/sup 8/Be)/sup 20/Ne* (..cap alpha../sub 0/)/sup 16/O reactions. The /sup 8/Be nuclei were detected at 0/sup 0/, and the alpha particles from the decay of the excited states formed in the (/sup 12/C,/sup 8/Be) reactions were detected over the range 40/sup 0/ < or = theta/sub lab/ < or = 97/sup 0/, typically corresponding to a range in the heavy-recoil center-of-mass system of 50/sup 0/ < or = theta/sub RCM/ < or = 120/sup 0/. Structure observed at an excitation energy of 22.5 +- 0.5 MeV in /sup 16/O appears to correspond to an 8/sup +/ state which is then a candidate for identification as the 8/sup +/ member of the K/sup ..pi../ = 0/sup +/, 4p-4h rotational band. In /sup 20/Ne we have confirmed a number of spin assignments for states below 16 MeV in excitation, and in addition we have made the following assignments: 16.63 MeV (7/sup -/), 17.3 MeV (8/sup +/), 21.08 MeV (9/sup -/), and 22.87 MeV (9/sup -/). All of the ..cap alpha../sub 0/ branching ratios for the strongly populated states in /sup 20/Ne are found to be roughly 100%, with the exception of those for the 17.3 MeV (8/sup +/) and 21.08 MeV (9/sup -/) levels which are found to be 40% and 65%, respectively.

• Research Organization: A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520
• OSTI ID: 5937073
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 20:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALKALINE EARTH ISOTOPES
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
ALPHA SPECTRA
ALPHA-TRANSFER REACTIONS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BERYLLIUM 8
BERYLLIUM ISOTOPES
BRANCHING RATIO
CARBON 12 REACTIONS
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
DECAY
DIRECT REACTIONS
DISTRIBUTION
ELECTROSTATIC ACCELERATORS
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
FOUR-NUCLEON TRANSFER REACTIONS
HEAVY ION REACTIONS
HIGH SPIN STATES
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
MULTI-NUCLEON TRANSFER REACTIONS
NEON 20
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEI
OXYGEN 16
OXYGEN 16 TARGET
OXYGEN ISOTOPES
PARITY
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA
SPIN
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS
VAN DE GRAAFF ACCELERATORS