Alpha-transfer reactions in light nuclei. II. (/sup 3/He, /sup 7/Be) pickup reaction. [Finite range DWBA, Hauser-Feshbach analyses, angular distributions]

Journal Article · Sun Aug 01 04:00:00 EDT 1976 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.14.475· OSTI ID:7175272

Pisano, D J; Parker, P D

The (/sup 3/He, /sup 7/Be) reaction has been studied at a laboratory energy of 25.5 MeV for /sup 16/O and /sup 24/Mg targets and at energies of 25.5, 27.0, and 29.0 MeV for a /sup 12/C target. Angular distributions have been measured from theta/sub lab/ = 15degree to 160degree for transitions to low-lying states in the residual nuclei. The resulting angular distributions have been analyzed (1) using an exact-finite-range distorted-wave Born-approximation formalism including multistep processes and (2) using a Hauser-Feshbach compound-nuclear model. In general, the shapes of the forward angle (/sup 3/He, /sup 7/Be) data are well described by the finite-range distorted-wave Born-approximation and finite-range coupled-channels Born-approximation calculations. The magnitude of the measured transition to the 1.63-MeV (2/sup +/) state in /sup 20/Ne is approximately 100 times larger than predicted by an SU/sub 3/ theory for a simple one-step transition, and this transition is shown to be an example in which a finite-range coupled-channels Born-approximation analysis is required. Arguments concerning the direct nature of the reaction process populating these states are discussed, and spectroscopic information is extracted. (AIP)

• Research Organization: Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520
• OSTI ID: 7175272
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 14:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
ALPHA-TRANSFER REACTIONS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BERYLLIUM 7
BERYLLIUM 8
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BORN APPROXIMATION
CARBON 12
CARBON 12 TARGET
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
DAYS LIVING RADIOISOTOPES
DIRECT REACTIONS
DISTRIBUTION
DWBA
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FOUR-NUCLEON TRANSFER REACTIONS
HAUSER-FESHBACH THEORY
HELIUM 3 REACTIONS
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 24 TARGET
MEV RANGE
MEV RANGE 10-100
MULTI-NUCLEON TRANSFER REACTIONS
NEON 20
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEAR THEORY
NUCLEI
OXYGEN 16 TARGET
PARITY
PARTICLE PROPERTIES
PICKUP REACTIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPIN
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS