Observation of the astrophysically important 3(+) state in Ne-18 via elastic scattering of a radioactive P-17 beam from H-1

Authors
Bardayan, DW Blackmon, JC Brune, CR Champagne, AE Chen, AA Cox, JM Davinson, T Hansper, VY Hofstee, MA Johnson, BA Kozub, RL Ma, Z Parker, PD Pierce, DE Rabban, MT Shotter, AC Smith, MS Swartz, KB Visser, DW Woods, PJ
Citation
Dw. Bardayan et al., Observation of the astrophysically important 3(+) state in Ne-18 via elastic scattering of a radioactive P-17 beam from H-1, PHYS REV L, 83(1), 1999, pp. 45-48
Citations number
28
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
1
Year of publication
1999
Pages
45 - 48
Database
ISI
SICI code
0031-9007(19990705)83:1<45:OOTAI3>2.0.ZU;2-3
Abstract
The F-17(p, gamma)Ne-18 reaction is important in stellar explosions, but it s rate has been uncertain because of an expected 3(+) state in Ne-18 that h as never been conclusively observed. This state would provide a strong l = 0 resonance and, depending an its excitation energy, could dominate the ste llar reaction rate. We have observed this missing 3(+) state by measuring t he H-1(F-17, p)F-17 excitation function with a radioactive F-17 beam at the ORNL Holifield Radioactive Ion Beam Facility, We find that the state lies at a center-of-mass energy of E-r = 599.8 +/- 1.5(stat) +/- 2.0(sys) keV (E -x = 4523.7 +/- 2.9 keV) and has a width of Gamma = 18 +/- 2(stat) +/- 1(sy s) keV.