Reexamination of the Energy Levels of 15F by 14O + 1H ElasticResonance Scattering with BEARS

Journal Article · Mon May 30 00:00:00 EDT 2005 · Physics Review C

DOI:https://doi.org/10.1103/PhysRevC.72.034312· OSTI ID:862323

Guo, F Q; Powell, J; Lee, D W; Leitner, D; McMahan, M A; Moltz, D M; O'Neil, J P; Perajarvi, K; Phair, L; Ramsey, C A; Xu, X J; Cerny, Joseph

The energy levels of 15F have been measured by the p(14O,p)14O reaction. The 120 MeV 14O radioactive ion beam was produced by the BEARS coupled cyclotron system at an intensity averaging 1x104 particles/second on target. Energy calibration was obtained using resonances from the p(14N,p)14N reaction. The two lowest resonances in 15F were fitted with an R-matrix calculation. The fit to the ground state had Jp = 1/2+ at 1.23+-0.05 MeV (width 0.5-0.84 MeV), and the first excited state was Jp=5/2+ at 2.81+-0.02 MeV (width 0.30+-0.06 MeV), both relative to the mass-energy of the proton and 14O. The 15F ground state energy supports the disappearance of the Z=8 proton magic number for odd Z, Tz=-3/2 nuclei.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director. Office of Science. Office of NuclearPhysics
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 862323
• Report Number(s): LBNL-57696; R&D Project: 464501; BnR: KB0401024; TRN: US0600651
• Journal Information: Physics Review C, Vol. 72; Related Information: Journal Publication Date: 2005
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
CALIBRATION
CYCLOTRONS
ENERGY LEVELS
EXCITED STATES
GROUND STATES
MAGIC NUCLEI
NUCLEI
PROTONS
R MATRIX
RADIOACTIVE ION BEAMS
RESONANCE SCATTERING
15F 14O BEARS