Indirect study of the stellar reaction rate through reaction measurements
- Univ. of Notre Dame, IN (United States). Dept. of Physics and the Joint Inst. for Nuclear Astrophysics; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Tohoku Univ., Sendai (Japan). Research Center for Electron Photon Science
- Univ. of Notre Dame, IN (United States). Dept. of Physics and the Joint Inst. for Nuclear Astrophysics
- iThemba Lab. for Accelerator Sciences, Somerset West, Western Cape (South Africa)
- Univ. of Witwatersrand, Johannesburg (South Africa). School of Physics
- Univ.of Cape Town, Rondebosch, Western Cape (South Africa). Physics Dept.
- Univ. of Stellenbosch, Matieland, Western Cape (South Africa)
- iThemba Lab. for Accelerator Sciences, Somerset West, Western Cape (South Africa); Univ. of Stellenbosch, Matieland, Western Cape (South Africa)
- iThemba Lab. for Accelerator Sciences, Somerset West, Western Cape (South Africa); Univ. of Stellenbosch, Matieland, Western Cape (South Africa); Katholieke Univ. Leuven, Leuven (Belgium). Inst. for voor Kern- en Stralingsfysica,
- Univ. of Notre Dame, IN (United States). Dept. of Physics and the Joint Inst. for Nuclear Astrophysics; Argonne National Lab. (ANL), Argonne, IL (United States)
- Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
The 34Ar(α,p) 37K reaction is believed to be one of the last in a sequence of (α,p) and (p,γ) reactions within the Tz = -1 , sd-shell nuclei, known as the αp-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 αp-process, stellar rates are calculated using a statistical model, such as Hauser-Feshbach. Questions on the applicability of a Hauser-Feshbach model for the 34Ar (α,p) 37K reaction arise due to level density considerations in the compound nucleus, 38Ca . We have performed high energy-resolution forward-angle 40Ca (p,t) 38Ca measurements with the K = 600 spectrograph at iThemba LABS in order to identify levels above the α-threshold in 38Ca . States identified in this work were then used to determine the 34Ar (α,p) 37K reaction rate based on a narrow-resonance formalism. Comparisons are made to two standard Hauser-Feshbach model predicted rates at XRB temperatures.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC). Nuclear Physics (NP) (SC-26); USDOE
- Grant/Contract Number:
- AC52-06NA25396; SC0009883
- OSTI ID:
- 1392814
- Alternate ID(s):
- OSTI ID: 1356447
- Report Number(s):
- LA-UR-17-25567; PRVCAN
- Journal Information:
- Physical Review C, Vol. 95, Issue 5; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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