A study of the Fermi (0{sup +}) transition in {sup 14}C({ital {rvec p}},{ital n}){sup 14}N at 495 MeV

Journal Article · Sat Jul 15 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48613· OSTI ID:146765

Cooper, D A; Delucia, S L; Luther, B A ^[1]; McClelland, J B; Prout, D L; Rybarcyk, L J ^[2]; Sugarbaker, E ^[1]; Taddeucci, T N ^[2]

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1. The Ohio State University, Columbus, Ohio 43210 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Differential cross sections and analyzing powers have been measured for the {sup 14}C({ital {rvec p}},{ital n}){sup 14}N*(IAS) reaction at a proton energy of 495 MeV. The data were obtained at the LAMPF Neutron Time-of-Flight Facility (NTOF) using a flight path of 400 meters over an angular distribution of {theta}{sub {ital lab}}=0{degree} to 10{degree} ({ital q}=0.0 to 0.956{ital fm}{sup {minus}1}). Previous {ital A}{sub {ital y}} results for targets with mixed Fermi ({Delta}{ital J}{sup {pi}}=0{sup +}) and Gamow-Teller ({Delta}{ital J}{sup {pi}}=1{sup +}) transitions are not reproduced with either DWIA or RIA calculations. The {sup 14}C target offers the best opportunity to study a pure Fermi transition (2.31 MeV) resolved from the nearest Gamow-Teller (GT) strength (3.95 MeV). The results compare favorably with DWIA and RIA calculations. Thus the discrepancies for mixed Fermi and GT states most likely arise from either failure to understand nuclear structure effects or the nuclear distortion factors.

• Sponsoring Organization: USDOE
• OSTI ID: 146765
• Report Number(s): CONF-9409103--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 339; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON 14 TARGET
CHARGE-EXCHANGE REACTIONS
DIFFERENTIAL CROSS SECTIONS
FERMI INTERACTIONS
MEV RANGE 100-1000
NEUTRONS
NITROGEN 14
POLARIZATION-ASYMMETRY RATIO
PROTON REACTIONS