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

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

Bibliographic Details
Main Author: Sultana, Chowdhury Irin
Language:English
Published: Ohio University / OhioLINK 2019
Subjects:
Physics
X-ray burst
Thermonuclear rate
Resonance energy
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566229309544122
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou15662293095441222021-08-03T07:12:35Z Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate Sultana, Chowdhury Irin Physics X-ray burst Thermonuclear rate Resonance energy 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. 2019 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566229309544122 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566229309544122 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Physics
X-ray burst
Thermonuclear rate
Resonance energy
spellingShingle Physics
X-ray burst
Thermonuclear rate
Resonance energy
Sultana, Chowdhury Irin
Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate
author Sultana, Chowdhury Irin
author_facet Sultana, Chowdhury Irin
author_sort Sultana, Chowdhury Irin
title Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate
title_short Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate
title_full Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate
title_fullStr Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate
title_full_unstemmed Resolving the Resonance Conflict in the 18Ne(ɑ,p) Reaction Rate
title_sort resolving the resonance conflict in the 18ne(ɑ,p) reaction rate
publisher Ohio University / OhioLINK
publishDate 2019
url http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1566229309544122
work_keys_str_mv AT sultanachowdhuryirin resolvingtheresonanceconflictinthe18neɑpreactionrate
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