Structure of 18Ne and the breakout from the hot CNO cycle
Creators
- Hahn, K.I.1, 2, 3, 4, 5, 6, 7
- Garcia, A.1, 2, 3, 4, 5, 6, 7
- Adelberger, E.G.1, 2, 3, 4, 5, 6, 7
- Magnus, P.V.1, 2, 3, 4, 5, 6, 7
- Bacher, A.D.1, 2, 3, 4, 5, 6, 7
- Bateman, N.1, 2, 3, 4, 5, 6, 7
- Berg, G.P.1, 2, 3, 4, 5, 6, 7
- Blackmon, J.C.1, 2, 3, 4, 5, 6, 7
- Champagne, A.E.1, 2, 3, 4, 5, 6, 7
- Davis, B.1, 2, 3, 4, 5, 6, 7
- Howard, A.J.1, 2, 3, 4, 5, 6, 7
- Liu, J.1, 2, 3, 4, 5, 6, 7
- Lund, B.1, 2, 3, 4, 5, 6, 7
- Mao, Z.Q.1, 2, 3, 4, 5, 6, 7
- Markoff, D.M.1, 2, 3, 4, 5, 6, 7
- Parker, P.D.1, 2, 3, 4, 5, 6, 7
- Smith, M.S.1, 2, 3, 4, 5, 6, 7
- Stephenson, E.J.1, 2, 3, 4, 5, 6, 7
- Swartz, K.B.1, 2, 3, 4, 5, 6, 7
- Utku, S.1, 2, 3, 4, 5, 6, 7
- Vogelaar, R.B.1, 2, 3, 4, 5, 6, 7
- Yildiz, K.1, 2, 3, 4, 5, 6, 7
- 1. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
- 2. Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27706 (United States)
- 3. Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 (United States)
- 4. Indiana University Cyclotron Facility, Bloomington, Indiana 47408 (United States)
- 5. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
- 6. Nuclear Physics Laboratory GL-10, University of Washington, Seattle, Washington 98195 (United States)
- 7. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8124 (United States)
Description
We used the 16O(3He,n)18Ne, 12C(12C,6He)18Ne, and 20Ne(p,t)18Ne reactions to study 18Ne states up to an excitation energy of 10 MeV, with emphasis on levels corresponding to 14O(α,p)17F and 17F(p,γ)18Ne resonances that could strongly affect these reaction rates in hot stellar environments. Excitation energies, widths, absolute cross sections, and angular distributions were measured. We found previously unidentified states at Ex=6.15±0.01 MeV, 7.12±0.02 MeV, 7.35±0.02 MeV, 7.62±0.02 MeV, 8.30±0.02 MeV, (8.45±0.03 MeV), 8.55±0.03 MeV, 8.94±0.02 MeV, and 9.58±0.02 MeV. We combined level width, cross section, and angular distribution data to infer Jπ values for a number of the new levels as well as for the previously known 5.1-MeV doublet. Using information from our experiments, we recalculated the 14O(α,p)17F reaction rate, which constitutes a possible path out of the hot CNO cycle into the rp process and could play an important role in transforming nuclei involved in the hot CNO cycle into heavier nuclei with Z≥10. copyright 1996 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. C, Nuclear Physics
- Journal Volume
- 54
- Journal Issue
- 4
- Journal Page Range
- p. 1999-2013.
- ISSN
- 0556-2813
- CODEN
- PRVCAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28010599
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ALPHA REACTIONS; ANGULAR DISTRIBUTION; CARBON 12 REACTIONS; CARBON 12 TARGET; CROSS SECTIONS; EXCITATION; FLUORINE 17; HELIUM 3 REACTIONS; NEON 18; NEON 20 TARGET; NUCLEAR STRUCTURE; OXYGEN 14; OXYGEN 16; PROTON REACTIONS; WIDTH
- Descriptors DEC
- BARYON REACTIONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; DIMENSIONS; DISTRIBUTION; ENERGY-LEVEL TRANSITIONS; EVEN-EVEN NUCLEI; FLUORINE ISOTOPES; HADRON REACTIONS; HEAVY ION REACTIONS; ISOTOPES; LIGHT NUCLEI; MINUTES LIVING RADIOISOTOPES; NEON ISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; ODD-EVEN NUCLEI; OXYGEN ISOTOPES; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; STABLE ISOTOPES; TARGETS