June 2012

Conference Paper

A new technique for measuring astrophysically important (alpha,p) reactions

By:
Chae, K. Y.; Bardayan, Daniel W; Nesaraja, Caroline D; Smith, Michael S; Ahn, S.H.; Ayres, A.; Bey, A.; Jones, K.; Pittman, S. T.; Howard, M. E.; O'Malley, Patrick; Kozub, Raymond L; Matos, M.; Moazen, Brian; Peters, W. A.
Journal Name:
PoS - Proceedings of Science
Page Number:
217
Volume:
NICXI
Issue Number:
1
Publication Date:
June 8, 2012
Conference Name:
Nuclei in the Cosmos
Conference Location:
Heidelberg, Germany

Abstract

Studying (α,p) reactions of astrophysical interest with radioactive beams presents serious challenges because of the difficult nature of the target. We have developed a new approach for the measurement of (α,p) reactions using heavy ion beams in inverse kinematics and have measured the 4He(19F,1H)22Ne reaction as a demonstration. 19F beams were used at the Holifield Radioactive Ion Beam Facility (HRIBF) tandem accelerator in Oak Ridge National Laboratory (ORNL) to bombard a large scattering chamber filled with 4He gas. Recoiling protons from the reactions were detected by the large area annular silicon strip detector array (SIDAR). The 19F(α,p) and 19F(α,p’) excitation functions were measured over the energy range of E c.m. ∼1-2.1 MeV, demonstrating the viability of the technique

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