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APS » Journals » Phys. Rev. C » Volume 38 » Issue 4
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Phys. Rev. C 38, 1958–1960 (1988)

11B(α,p)14C*(Ex=23.288 MeV) reaction and (p,π+) production mechanisms

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J. D. Brown, L. K. Herold, K. E. Luther, A. A. Middleton, and M. L. Pitt
Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544

D. Barker
Nuclear Physics Laboratory, Rutgers University, New Brunswick, New Jersey 08903

S. M. Aziz
Indiana University Cyclotron Facility, Bloomington, Indiana 47405

Received 15 June 1988; published in the issue dated October 1988

A narrow, strongly excited state was observed in the 11B(α,p)14C reaction at 23.288 MeV. This excitation energy is in agreement with peaks seen in 13C(p,π+)14C and 14C(e,e′)14C reactions. However, the (p,π+) work indicates that this state may be a 3-, T=2 state. The population of this level via the (α,p) reaction rules this out. Furthermore, weak coupling calculations suggest that the centroid of the |11B⊗ν(p1/2,d5/2),π(d5/2)〉 configuration lies very close to this energy. It is therefore more probable that this state has a spin and parity of 7+, T=1 rather than a 3-, T=2 assignment.

© 1988 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.38.1958
DOI:
10.1103/PhysRevC.38.1958
PACS:
 
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