Measurement of the {sup 17}O({ital p},{alpha}){sup 14}N Cross Section at Stellar Energies

Journal Article · Mon Apr 03 00:00:00 EDT 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.74.2642· OSTI ID:44846

Blackmon, J C; Champagne, A E; Hofstee, M A ^[1]; Smith, M S ^[2]; Downing, R G; Lamaze, G P ^[3]

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1. The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3255 (United States)
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)

The cross section for the astrophysically important {sup 17}O({ital p},{alpha}){sup 14}N reaction was measured at proton energies of 75 and 65 keV. Thick, high-purity Ta{sub 2}O{sub 5} targets (77% enriched {sup 17}O) and large-area detectors were used with beam currents of 0.45 mA. Backgrounds were measured using Ta{sub 2}O{sub 5} targets of natural isotopic composition. The expected resonance at {ital E}{sub {ital p}}=70 keV was observed in the data taken at 75 keV, and its proton width was found to be 22{plus_minus}3{sub stat}{plus_minus}2{sub target}{sub {minus}1}{sup +2}{sub beam} neV.

• OSTI ID: 44846
• Journal Information: Physical Review Letters, Vol. 74, Issue 14; Other Information: PBD: 3 Apr 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
OXYGEN 17 TARGET
PROTON REACTIONS
CROSS SECTIONS
ALPHA PARTICLES
NITROGEN 14
KEV RANGE 10-100
RESONANCE
WIDTH
COULOMB FIELD