Direct Measurement of Low-Energy Resonances in ^31P(p,α)^28Si and ^35Cl(p,α)^32S

Catalin Matei, B. H. Moazen, K. Y. Chae, K. L. Jones, R. W. Kapler, S. T. Pittman, D. W. Bardayan, C. D. Nesaraja, S. D. Pain, M. S. Smith, J. Allen, K. A. Chipps, R. Hatarik, C. Matthews, P. D. O'Malley, Timothy G Pelham, W. A. Peters, J. C. Blackmon, M. Matos, R. L. KozubJ. Rogers, D. J. Sissom

Research output: Contribution to conferenceConference Abstractpeer-review


Reaction cycles in explosive hydrogen burning in novae and X-ray bursts influence both the energy generation and the processing of material to higher masses. The ^31P(p,α)^28Si and ^35Cl(p,α)^32S reactions are thought to lead to the formation of reaction cycles in the Si-Ar region, but the strength of these cycles depends on the (p,γ)/(p,α) reaction rate ratio. Previous attempts to measure the strength of low-energy resonances in ^32S and ^36Ar have relied on indirect methods or resulted only in setting upper limits for a number of the resonances of interest. We have measured the strength of low-energy resonances in ^32S and ^36Ar at Oak Ridge National Laboratory by using stable ^31P and ^35Cl beams and a differentially pumped windowless hydrogen gas target to detect p-α coincidences in arrays of silicon strip detectors. Details of the experimental configuration and results will be presented. ^*This work is supported in part by the U.S. DOE and NSF.
Original languageEnglish
Publication statusPublished - 1 May 2009
Event2009 APS April Meeting - Denver, United States
Duration: 2 May 20095 May 2009


Conference2009 APS April Meeting
Country/TerritoryUnited States
Internet address


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