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Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate

Sultana, Chowdhury Irin
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566229309544122

Abstract Details

2019, Master of Science (MS), Ohio University, Physics and Astronomy (Arts and Sciences).
One of the key reactions for the breakout from hot-CNO cycle into the rp-process in explosive hydrogen burning is 18Ne(alpha,p). At the ~0.4 GK break-out temperature for Type-I X-ray burst conditions, capture through a 1- state in 22Mg at 9.08 MeV is thought to dominate the reaction rate. However, since the most recent reaction rate evaluation, it has been suggested that another 1- state is located at 8.99 MeV. The existence of such a state could drastically change the 18Ne(alpha,p) reaction rate, possibly altering the shape of the X-ray bursts light curve and, consequently, conditions of the underlying neutron star inferred from model-observation comparisons. We set out to confirm or refute the existence of the 8.99 MeV state using neutron time-of-flight spectroscopy at the Edwards Accelerator Laboratory at Ohio University. The results from our recent measurement of 20Ne(3He,n)22Mg will be incorporated into X-ray bursts model calculations in the future.
Zach Meisel (Advisor)
59 p.
Physics
X-ray burst; Thermonuclear rate; Resonance energy

Recommended Citations

Citations

  • Sultana, C. I. (2019). Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566229309544122

    APA Style (7th edition)

  • Sultana, Chowdhury Irin. Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate . 2019. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566229309544122.

    MLA Style (8th edition)

  • Sultana, Chowdhury Irin. "Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate ." Master's thesis, Ohio University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566229309544122

    Chicago Manual of Style (17th edition)

ohiou1566229309544122
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This open access ETD is published by Ohio University and OhioLINK.