Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-10-26
J. Phys. G 31, 1437 (2005)
Physics
Nuclear Physics
Nuclear Theory
4 pages, 6 figures, revtex4
Scientific paper
10.1088/0954-3899/31/12/005
Given the Astrophysical interest of $^7$Be$(p,\gamma)^8$B, there have been several experiments applying the Coulomb dissociation method for extracting the capture rate. Measurements at Michigan State are dominated by $E1$ contributions but have a small $E2$ component. On the other hand, a lower energy measurement at Notre Dame has a much stronger $E2$ contribution. The expectation was that the two measurements would tie down the $E2$ and thus allow for an accurate extraction of the $E1$ relevant for the capture process. The aim of this brief report is to show that the $E2$ factor in breakup reactions does not translate into a scaling of the $E2$ contribution in the corresponding capture reaction. We show that changes to the $^8$B single particle parameters, which are directly related to the $E2$ component in the capture reaction, do not effect the corresponding breakup reactions, using the present reaction theory.
Nunes F. M.
Summers N. C.
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