Comment on ``{ital E}2 contribution to the {sup 8}B{r_arrow}{ital p}+{sup 7}Be Coulomb dissociation cross section``
- Department of Physics-U46, The University of Connecticut, Storrs, Connecticut 06269 (United States)
- Instituto de Fisica, UFRJ-Cidade Universitaria, Caixa Postal 68528, 21945-970 Rio de Janeiro (Brazil)
The {ital E}2 cross section calculated by Langanke and Shoppa for the RIKEN experiment on the Coulomb dissociation of {sup 8}B uses {ital E}2 nuclear matrix element from one specific model. Other nuclear models predict a considerably smaller {ital E}2 cross section (by approximately a factor of 3 to 4), and Langanke and Shoppa appear to assume the most optimistic scenario, predicting a large {ital E}2 cross section. We also note that Barker has already criticized the nuclear model used by Langanke and Shoppa. A {ital model} {ital independent} chi-square analysis of the RIKEN data suggest the best fit for the current RIKEN data is obtained with {ital E}1 amplitudes only. The upper limit (90% confidence) on the {ital E}2 component derived from our chi-square analysis is considerably smaller than that used by Langanke and Shoppa. The {ital model} {ital dependent} analysis of Langanke and Shoppa should not be considered as a correction to the RIKEN result, as claimed, and their quoted {ital S}{sub 17}(0) is not substantiated.
- DOE Contract Number:
- FG02-94ER40870; FG02-91ER40609
- OSTI ID:
- 249509
- Journal Information:
- Physical Review, C, Vol. 52, Issue 3; Other Information: PBD: Sep 1995
- Country of Publication:
- United States
- Language:
- English
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