Indirect study of the stellar ³⁴ Ar(α,p) ³⁷K reaction rate through ⁴⁰Ca(p,t) ³⁸Ca reaction measurements

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dc.contributor.authorLong, A. M.en_ZA
dc.contributor.authorAdachi, T.en_ZA
dc.contributor.authorBeard, M.en_ZA
dc.contributor.authorBerg, G. P. A.en_ZA
dc.contributor.authorButhelezi, Z.en_ZA
dc.contributor.authorCarter, J.en_ZA
dc.contributor.authorCouder, M.en_ZA
dc.contributor.authordeBoer, R. J.en_ZA
dc.contributor.authorFearick, R. W.en_ZA
dc.contributor.authorFortsch, S. V.en_ZA
dc.contributor.authorGorres, J.en_ZA
dc.contributor.authorMira, J. P.en_ZA
dc.contributor.authorMurray, S. H. T.en_ZA
dc.contributor.authorNeveling, R.en_ZA
dc.contributor.authorPapka, P.en_ZA
dc.contributor.authorSmit, F. D.en_ZA
dc.contributor.authorSideras-Haddad, E.en_ZA
dc.contributor.authorSwartz, J. A.en_ZA
dc.contributor.authorTalwar, R.en_ZA
dc.contributor.authorUsman, I. T.en_ZA
dc.contributor.authorWiescher, M.en_ZA
dc.contributor.authorVan Zyl, J. J.en_ZA
dc.contributor.authorVolya, A.en_ZA
dc.date.accessioned2018-11-06T09:15:54Z
dc.date.available2018-11-06T09:15:54Z
dc.date.issued2017
dc.descriptionCITATION: Long, A. M., et al. 2017. Indirect study of the stellar ³⁴ Ar(α,p) ³⁷K reaction rate through ⁴⁰Ca(p,t) ³⁸Ca reaction measurements. Physical Review C, 95(5):1-9, doi:10.1103/PhysRevC.95.055803.en_ZA
dc.descriptionThe original publication is available at https://journals.aps.org/prcen_ZA
dc.description.abstractThe 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.en_ZA
dc.description.urihttps://journals.aps.org/prc/abstract/10.1103/PhysRevC.95.055803
dc.description.versionPublisher's versionen_ZA
dc.format.extent9 pages : illustrations (some colour)en_ZA
dc.identifier.citationLong, A. M., et al. 2017. Indirect study of the stellar ³⁴ Ar(α,p) ³⁷K reaction rate through ⁴⁰Ca(p,t) ³⁸Ca reaction measurements. Physical Review C, 95(5):1-9, doi:10.1103/PhysRevC.95.055803en_ZA
dc.identifier.issn2469-9993 (online)
dc.identifier.issn2469-9985 (print)
dc.identifier.otherdoi:10.1103/PhysRevC.95.055803
dc.identifier.urihttp://hdl.handle.net/10019.1/104648
dc.language.isoen_ZAen_ZA
dc.publisherAmerican Physical Societyen_ZA
dc.rights.holderAmerican Physical Societyen_ZA
dc.subjectReaction rateen_ZA
dc.subjectHauser-Feshbach modelen_ZA
dc.subjectStatistical modelsen_ZA
dc.titleIndirect study of the stellar ³⁴ Ar(α,p) ³⁷K reaction rate through ⁴⁰Ca(p,t) ³⁸Ca reaction measurementsen_ZA
dc.typeArticleen_ZA
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