Two-proton pickup studies with the (6Li,8B) reaction
The (/sup 6/Li,/sup 8/B) reaction has been investigated on targets of /sup 26/Mg, /sup 24/Mg, /sup 16/O, /sup 13/C, /sup 12/C, /sup 11/B, /sup 10/B, and /sup 9/Be at a bombarding energy of 80.0 MeV, and on targets of /sup 16/O, /sup 12/C, /sup 9/Be, /sup 7/Li, and /sup 6/Li at a bombarding energy of 93.3 MeV. Only levels consistent with direct, single-step two-proton pickup reaction mechanisms were observed to be strongly populated. On T/sub z/ = 0 targets, the spectroscopic selectivity of this reaction resembles that of the analogous (p,t) reaction. Additionally, these data demonstrate the dominance of spatially symmetric transfer of the two protons. On T/sub z/ greater than 0 targets the (/sup 6/Li,/sup 8/B) reaction was employed to locate two previously unreported levels (at 7.47 +- 0.05 MeV and 8.86 +- 0.07 MeV) in the T/sub z/ = 2 nuclide /sup 24/Ne and to establish the low-lying 1p-shell states in the T/sub z/ = /sup 3///sub 2/ nuclei /sup 11/Be, /sup 9/Li, and /sup 7/He. However, no evidence was seen for any narrow levels in the T/sub z/ = /sup 3///sub 2/ nuclide /sup 5/H nor for any narrow excited states in /sup 7/He. The angular distributions reported here are rather featureless and decrease monotonically with increasing angle. This behavior can be shown by a semi-classical reaction theory to be a consequence of the reaction kinematics. A semi-classical approach also suggests that the kinematic term in the transition matrix element is only weakly dependent upon the angular momentum transfer (which is consistent with simple Distorted Wave Born Approximation calculations). However, only qualitative agreement was obtained between the observed relative transition yields and semi-classical predictions, using the two-nucleon coefficients of fractional parentage of Cohen and Kurath, probably due to the limitations of the semi-classical reaction theory.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7216383
- Report Number(s):
- LBL-5077; TRN: 77-011109
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
Similar Records
Spectroscopic information from the /sup 9/Be(/sup 7/Li,/sup 6/He)/sup 10/B and /sup 9/Be(/sup 7/Li,/sup 6/Li)/sup 10/Be reactions
Charge exchange, scattering, and transfer reactions for /sup 9/Be+/sup 6/Li and analysis of /sup 14/C(/sup 6/Li,/sup 6/He)
Related Subjects
LITHIUM 6 REACTIONS
PICKUP REACTIONS
MAGNESIUM 26 TARGET
MAGNESIUM 24 TARGET
OXYGEN 16 TARGET
CARBON 13 TARGET
CARBON 12 TARGET
BORON 11 TARGET
BORON 10 TARGET
BERYLLIUM 9 TARGET
LITHIUM 7 TARGET
LITHIUM 6 TARGET
ANGULAR DISTRIBUTION
BORON 8
ENERGY LEVELS
MEV RANGE 10-100
Q-VALUE
TWO-NUCLEON TRANSFER REACTIONS
NEON 24
NEON 22
CARBON 14
BERYLLIUM 11
BERYLLIUM 10
LITHIUM 9
LITHIUM 8
HELIUM 7
HYDROGEN 5
HYDROGEN 4
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON ISOTOPES
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
DIRECT REACTIONS
DISTRIBUTION
ENERGY
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY ION REACTIONS
HELIUM ISOTOPES
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
LITHIUM ISOTOPES
MEV RANGE
MINUTES LIVING RADIOISOTOPES
MULTI-NUCLEON TRANSFER REACTIONS
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES
651425* - Nuclear Properties & Reactions
A=20-38
Experimental- Nuclear Reactions & Scattering- (-1987)
651325 - Nuclear Properties & Reactions
A=6-19
Experimental- Nuclear Reactions & Scattering- (-1987)