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Properties of states near 𝐸𝑥 = 6 MeV in 18Ne through 17F +𝑝 scattering

Journal Article · · Physical Review. C
DOI:https://doi.org/10.1103/6cm6-s6g7· OSTI ID:3000417
 [1];  [2];  [2];  [2];  [3];  [2];  [2];  [2];  [4];  [5];  [5];  [6];  [6];  [7]
  1. Louisiana State University Baton Rouge, LA (United States); Rutgers University, New Brunswick, NJ (United States)
  2. Louisiana State University Baton Rouge, LA (United States)
  3. Louisiana State University Baton Rouge, LA (United States); U.S. Department of Defense, Arlington, VA (United States)
  4. Argonne National Laboratory (ANL), Argonne, IL (United States); Florida State University, Tallahassee, FL (United States)
  5. Florida State University, Tallahassee, FL (United States)
  6. Texas A & M University, College Station, TX (United States)
  7. University of Notre Dame, IN (United States)
+ Show Author Affiliations
The rate of energy production in the hot-CNO cycle and breakout to the rapid-proton capture process in Type I X-ray bursts is strongly related to the 14O⁡(𝛼,𝑝)⁢ 17F reaction rate. The properties of states in 18Ne near 𝐸𝑥 = 6.1–6.3 MeV are important for understanding the 14O⁡(𝛼,𝑝)⁢17F reaction rate. In order to study 18Ne resonances around this energy region, the RESOLUT radioactive-ion beam facility at Florida State University was used to perform 17F⁡(𝑝,𝑝)⁢17F elastic scattering on a polypropylene target under inverse kinematics. Scattered protons were detected in a silicon-strip detector array while recoiling 17F ions were detected in coincidence in a gas ionization detector. An 𝑅-matrix analysis of measured cross sections was conducted along with a reanalysis of data from previous 17F +𝑝 measurements. All the data analyzed are well described by a consistent set of parameters with a 1− assignment for a state at 6.14(1) MeV. A second comparable solution is also found with a 3− assignment for the 6.14(1) MeV state. There is no conclusive evidence supporting one of the two solutions over the other. The rates of the 14O⁡(𝛼,p)⁢17F reaction that are determined from the two solutions differ by up to an order of magnitude.
Research Organization:
Texas A&M University, College Station, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
Grant/Contract Number:
FG02-93ER40773; FG02-96ER40989
OSTI ID:
3000417
Journal Information:
Physical Review. C, Journal Name: Physical Review. C Journal Issue: 1 Vol. 112; ISSN 2469-9985; ISSN 2469-9993
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

6 ≤ A ≤ 19
Elastic scattering reactions
H & He induced nuclear reactions
Nuclear astrophysics
X ray bursts