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Indirect Study Of The Stellar Ar-34(alpha, P)k-37 Reaction Rate Through Ca-40(p, T)ca-38 Reaction Measurements

Title: Indirect Study Of The Stellar Ar-34(alpha, P)k-37 Reaction Rate Through Ca-40(p, T)ca-38 Reaction Measurements.
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Name(s): Long, A. M., author
Adachi, T., author
Beard, M., author
Berg, G. P. A., author
Buthelezi, Z., author
Carter, J., author
Couder, M., author
deBoer, R. J., author
Fearick, R. W., author
Fortsch, S. V., author
Gorres, J., author
Mira, J. P., author
Murray, S. H. T., author
Neveling, R., author
Papka, P., author
Smit, F. D., author
Sideras-Haddad, E., author
Swartz, J. A., author
Talwar, R., author
Usman, I. T., author
Wiescher, M., author
Van Zyl, J. J., author
Volya, A., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2017-05-10
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The Ar-34(alpha, p)K-37 reaction is believed to be one of the last in a sequence of (alpha, p) and (p, gamma) reactions within the T-z = -1, sd-shell nuclei, known as the alpha p-process. This process is expected to influence the shape and rise times of luminosity curves coming from type I x-ray bursts (XRBs). With very little experimental information known on many of the reactions within the alpha p-process, stellar rates are calculated using a statistical model, such as Hauser-Feshbach. Questions on the applicability of a Hauser-Feshbach model for the Ar-34(alpha, p)K-37 reaction arise due to level density considerations in the compound nucleus, Ca-38. We have performed high energy-resolution forward-angle Ca-40(p, t)Ca-38 measurements with the K = 600 spectrograph at iThemba LABS in order to identify levels above the alpha-threshold in Ca-38. States identified in this work were then used to determine the Ar-34(alpha, p)K-37 reaction rate based on a narrow-resonance formalism. Comparisons are made to two standard Hauser-Feshbach model predicted rates at XRB temperatures.
Identifier: FSU_libsubv1_wos_000401231400006 (IID), 10.1103/PhysRevC.95.055803 (DOI)
Keywords: stability, accreting neutron-stars, ar-34, nuclear-level density, particle spectroscopic strengths, rp-process, shell, si-26, systematics, x-ray-bursts
Publication Note: The publisher's version of record is available at https://doi.org/10.1103/PhysRevC.95.055803
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000401231400006
Owner Institution: FSU
Is Part Of: Physical Review C.
2469-9985
Issue: iss. 5, vol. 95

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Long, A. M., Adachi, T., Beard, M., Berg, G. P. A., Buthelezi, Z., Carter, J., … Volya, A. (2017). Indirect Study Of The Stellar Ar-34(alpha, P)k-37 Reaction Rate Through Ca-40(p, T)ca-38 Reaction Measurements. Physical Review C. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000401231400006