Remeasurement of the 193 keV resonance in O17(p,α)N14

Joseph R Newton, C. Iliadis, A. E. Champagne, R. Longland, C. Ugalde

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A recently discovered resonance at 193 keV determines the thermonuclear rates of the O17 +p reactions at temperatures important for the nucleosynthesis in classical novae (T=0.1-0.4 GK). We report on a remeasurement of this resonance in the O17(p,α)N14 reaction by using a different kind of target compared to the previous study. Special emphasis is placed on Monte Carlo simulations of the experiment in order to better understand certain effects that have been disregarded previously. Our measured value of the resonance strength amounts to (ωγ)pα=(1.66±0.17)×10-3 eV, in agreement with the previously reported result. As a byproduct of our study, we find that the inhomogeneity of the foil placed in front of the α-particle detector determines the resolution in the pulse-height spectrum, and thus constrains the signal-to-noise ratio in searches of very weak (p,α) resonances.

Original languageEnglish (US)
Article number055808
JournalPhysical Review C - Nuclear Physics
Volume75
Issue number5
DOIs
StatePublished - May 15 2007

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novae
radiation counters
pulse amplitude
nuclear fusion
foils
inhomogeneity
signal to noise ratios
simulation
temperature

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Remeasurement of the 193 keV resonance in O17(p,α)N14. / Newton, Joseph R; Iliadis, C.; Champagne, A. E.; Longland, R.; Ugalde, C.

In: Physical Review C - Nuclear Physics, Vol. 75, No. 5, 055808, 15.05.2007.

Research output: Contribution to journalArticle

Newton, Joseph R ; Iliadis, C. ; Champagne, A. E. ; Longland, R. ; Ugalde, C. / Remeasurement of the 193 keV resonance in O17(p,α)N14. In: Physical Review C - Nuclear Physics. 2007 ; Vol. 75, No. 5.
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