Observation of the Astrophysically Important 3{sup +} State in N{number_sign}^{18e via Elastic Scattering of a Radioactive F{number_sign}17 Beam from H{number_sign}1}

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.45· OSTI ID:365861

Bardayan, D W; Blackmon, J C; Hansper, V Y; Ma, Z; Pierce, D E; Rabban, M T; Smith, M S ^[1]; Bardayan, D W; Chen, A A; Parker, P D; Swartz, K B; Visser, D W ^[2]; Brune, C R; Champagne, A E; Hansper, V Y ^[3]; Cox, J M; Johnson, B A; Kozub, R L ^[4]; Davinson, T; Shotter, A C ; Woods, P J ^[5]; Hofstee, M A ^[6]; Ma, Z ^[7]; Ma, Z ^[8]

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1. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511 (United States)
3. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599 (United States)
4. Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505 (United States)
5. Department of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
6. Department of Physics, Colorado School of Mines, Golden, Colorado 80401 (United States)
7. Chinese Institute for Atomic Energy, Beijing, 102413, People`s Republic of (China)
8. Joint Institute for Heavy Ion Research, Oak Ridge, Tennessee 37831 (United States)

The {sup 17}F( p,thinsp{gamma}){sup 18}Ne reaction is important in stellar explosions, but its rate has been uncertain because of an expected 3{sup +} state in {sup 18}Ne that has never been conclusively observed. This state would provide a strong {ell}=0 resonance and, depending on its excitation energy, could dominate the stellar reaction rate. We have observed this missing 3{sup +} state by measuring the {sup 1}H( {sup 17}F,thinspp) {sup 17}F excitation function with a radioactive {sup 17}F beam at the ORNL Holifield Radioactive Ion Beam Facility. We find that the state lies at a center-of-mass energy of E{sub r}=599.8{plus_minus}1 .5{sub stat}{plus_minus}2.0{sub sys} keV (E{sub x}=4523.7{plus_minus} 2.9 keV) and has a width of {Gamma}=18{plus_minus}2{sub stat}{plus_minus}1{sub sys} keV . {copyright} {ital 1999} {ital The American Physical Society}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464; FG02-91ER40609
• OSTI ID: 365861
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COSMIC X-RAY BURSTS
ELASTIC SCATTERING
FLUORINE
FLUORINE 17
NEON
NEON 18
NOVAE
PROTON REACTIONS
STELLAR ACTIVITY
SUPERNOVAE