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Polarization of single-particle states involved in heavy ion transfer reactions

Author
Pruess, K.
Published
United States : [publisher not identified], 1976.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1976.
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Charlton, L. A., Delic, G., and Glendenning, N. K.

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Summary
If two nuclei could be placed next to each other at a distance typical of grazing collisions, the single-particle states in each would adjust themselves to the presence of the other nucleus. They would develop an appreciable probability of being in the other nucleus, and the more weakly bound the state, the more strongly it would be polarized by the other nucleus. The solution to this situation has been realized in the two-center shell model. Whether such an adjustment can occur during a reaction depends on the ratio of the transit time to the nuclear periods of the more weakly bound nucleons. In typical low-energy experiments this ratio appears to allow for such a polarization. Clearly if it occurs, the form factor for a transfer reaction will be modified from those currently employed, which use the asymptotic single-particle states of the non-interacting separated nuclei. From the foregoing discussion it is expected that (1) for stripping reactions to a sequence of excited states in the target nucleus, the polarization effects will increase with increasing excitation (i.e., decreasing binding), (2) since transfer can take place for larger impact parameters if polarization occurs, the effect on the angular distribution will be a shift to smaller angles compared to normal DWBA, (3) the polarization effect will ultimately vanish at sufficiently high bombarding energy. Calculations so far show that the single particle states of the heavier of the reaction partners suffer the greater polarization. 2 figures.
Report Numbers
LBL-5008; CONF-760424-10
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: W-7405-ENG-48
OSTI Identifier 7184188
Research organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
View MARC record | catkey: 45894596