Reaction mechanism of (. cap alpha. ,d) transfer in /sup 208/Pb(. cap alpha. ,d)/sup 210/Bi at 33 and 48 MeV
The reaction /sup 208/Pb(..cap alpha..,d)/sup 210/Bi has been studied at 33 and 48 MeV with particular emphasis on the (h/sub 9/2/g/sub 9/2/) ground-state multiplet and the high-spin members of other low-lying n-p multiplets, which are expected to be of high purity. About 50 angular distributions were obtained and used as a basis for a study of the transfer mechanism in (..cap alpha..,d) reactions. The analysis was made with the microscopic distorted-wave Born approximation and with two-step coupled-reaction-channel calculations. The L transfers observed ranged from L = 1 to L = 13 and were consistent with one-step transfer selection rules. Nevertheless, the relative magnitudes of cross sections to levels of the (h/sub 9/2/g/sub 9/2/) ground-state multiplet disagree with one-step-transfer predictions at either beam energy by factors which vary from 0.5 to 4.0. This phenomenon is explained as a coherent addition of the sequential stripping amplitudes (..cap alpha..,t;t,d) and (..cap alpha..,/sup 3/He;/sup 3/He,d) to the one-step amplitude, where the important (..cap alpha..,t;t,d) amplitude typically amounts to about 50% of the one-step (..cap alpha..,d) amplitude for high- and low-spin states alike. Details of the coupled-reaction-channel analysis are provided. The two-step calculations were kept free of arbitrary parameters by a simultaneous analysis of previously published /sup 208/Pb(t,d), /sup 208/Pb(/sup 3/He,d), /sup 208/Pb(..cap alpha..,t), and /sup 208/Pb(a,/sup 3/He) single-particle transfer data. This systematic reanalysis indicated again that most single-particle states in /sup 209/Pb and /sup 209/Bi show their full spectroscopic strength, but that the ri/sub 13/2/ and nj/sub 15/2/ single-particle states are not pure and have single-nucleon spectroscopic factors of about 0.75 +- 0.10.
- Research Organization:
- Nuclear Physics Laboratory, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
- OSTI ID:
- 6390177
- Journal Information:
- Phys. Rev., C; (United States), Vol. 23:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALPHA REACTIONS
STRIPPING
BISMUTH 210
ENERGY LEVELS
LEAD 208 TARGET
ANGULAR DISTRIBUTION
CROSS SECTIONS
DEUTERONS
DWBA
MEV RANGE 10-100
PRINCETON CYCLOTRON
SELECTION RULES
SINGLE-PARTICLE MODEL
SPECTROSCOPIC FACTORS
ACCELERATORS
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BISMUTH ISOTOPES
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DAYS LIVING RADIOISOTOPES
DIRECT REACTIONS
DISTRIBUTION
ENERGY RANGE
HEAVY NUCLEI
ISOCHRONOUS CYCLOTRONS
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
PARTICLE MODELS
RADIOISOTOPES
TARGETS
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES
651923* - Nuclear Properties & Reactions
A=190-219
Experimental- Energy Levels & Transitions- (-1987)
651925 - Nuclear Properties & Reactions
A=190-219
Experimental- Nuclear Reactions & Scattering- (-1987)