Measurement of Low Energy Resonances in ^31P(p,α)^28Si

B. H. Moazen, C. Matei, D. W. Bardayan, J. C. Blackmon, K. Y. Chae, K. A. Chipps, R. Hatarik, K. L. Grzywacz, R. W. Kapler, R. L. Kozub, M. Matos, C. D. Nesaraja, S. D. Pain, Timothy G Pelham, W. A. Peters, S. T. Pittman, J. F., Jr. Shriner, M. S. Smith

Research output: Contribution to conferenceConference Abstractpeer-review


The (p,α) reactions on T=1/2 nuclei like ^23Na, ^27Al, ^31P, and ^35Cl, and the competing (p,γ) reactions are important for understanding the reaction flow to heavier elements in the rp-process. Previous rate calculations of the ^31P(p,α)^28Si reaction were based on indirect information gained from studies of the ^31P(^3He,d)^28S reaction [1]. At ORNL, we measured the energy and strength of the 371 and 599 keV resonances in ^31P(p,α)^28Si using a technique previously employed for an ^17O(p,α)^14N study[2]. A beam of ^31P bombarded hydrogen gas which filled a large, differentially pumped scattering chamber at a pressure of 3 Torr. The alpha particle and ^28Si recoil were detected in coincidence and the reaction vertex was determined using the relative kinematics of the reaction products. The experimental setup and preliminary results will be presented. [1] Ross et al., Phys. Rev C 52, 1681 (1995) [2] B. H. Moazen et al., Phys. Rev. C 75, 065801 (2006) ORNL is managed by UT-Battelle for the US DOE
Original languageEnglish
Publication statusPublished - 1 Oct 2008
Event2008 Annual Meeting of the Division of Nuclear Physics, American Physical Society - Oakland, United States
Duration: 23 Oct 200826 Oct 2008


Conference2008 Annual Meeting of the Division of Nuclear Physics, American Physical Society
Abbreviated titleDNP08 Meeting
Country/TerritoryUnited States
Internet address


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