Breakup of He6 incident on Bi209 near the Coulomb barrier
- J. J. Kolatae(Author),
- H. Amrob(Author),
- F. D. Becchettib(Author),
- J. A. Brownf(Author),
- P. A. Deyoungd(Author),
- M. Hencheckc(Author)
- ,
- bUniversity of Michigan, Ann Arbor,
- cUniversity of Wisconsin Green Bay,
- dHope College,
- eUniversity of Notre Dame,
- fWabash College
Research Output: Contribution to journal Article Peer-review
Abstract
A neutron-α-particle coincidence experiment was performed to study breakup of He6 on a Bi209 target at an incident energy of 22.5 MeV. Direct breakup, as well as breakup through the 2+ excited state of He6 and also the He5+n channel, could be distinguished. A total breakup cross section of 205±65 mb was measured. The data compare well with a coupled-channels calculation that assumes a 50% reduction in the B(E1) computed from a pure He4+2n cluster configuration, in agreement with results obtained at much higher energies. A value of B(E2)=5.4±0.7e2fm4 is deduced for the 2+ state in He6.