The resonance at 483 and 597 keV proton energies in F19 + p reactions

Berkes, István; Dézsi, I.; Fodor, I; Keszthelyi, L.

doi:10.1016/0029-5582(63)90332-8

Cited by 9 publications

(35 citation statements)

References 5 publications

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“…The resonance strength was taken from Lyons [21], whereas the branching ratios were taken from Meyers [22]. Previous measurements of the resonance parameters for 19 F(p, γ ) have relied on either a published measurement of the cross sections ( [5][6][7]9]) of resonances in 19 F(p, γ ) or the yield relative to the 19 F(p, α) reaction ( [4]). Even more problematic, uncertainties are not reported by previous authors for the these resonance parameters.…”

Section: -4mentioning

confidence: 99%

“…Previous measurements relied on detecting the >11 MeV primary transition to the first excited state of 20 Ne [4][5][6][7][8][9]. Most of these prior measurements relied on low resolution and relatively small-volume NaI(Tl) detectors.…”

Section: Introductionmentioning

confidence: 99%

“…One measurement observed an anomalously high partial width for the broad resonance at E c.m. = 564 keV [7]. The measurement by Clifford [8] was restricted to the energy range from E c.m.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of theF19(p,γ)
Couture
¹
,
Beard
²
,
Couder
³

et al. 2008
Phys. Rev. C
26
3
13
0
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The 19 F(p, γ ) 20 Ne reaction represents the only breakout path for the carbon-nitrogen-oxygen cycle operating at temperatures below T = 0.1 GK, an energy regime important for main-sequence hydrogen burning as well as hydrogen burning in asymptotic giant branch stars. Large experimental uncertainties exist due to unknown low energy direct and resonant reaction contributions that have been difficult to study because of the high γ -ray background from the 19 F(p, α 2 γ ) reaction. A new detection technique has been developed at the University of Notre Dame to measure the 19 F(p, γ ) and 19 F(p, α i γ ) reactions over an energy range of E c.m. = 200-760 keV. The analysis was carried out in a Breit-Wigner framework. This allowed a new determination of the resonance parameters as well as a first measurement of the signs of the interference terms. Partial widths and resonance strengths are reported for the resonances in this region.

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Section: -4mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measurement of theF19(p,γ)
Couture
¹
,
Beard
²
,
Couder
³

et al. 2008
Phys. Rev. C
26
3
13
0
View full text Add to dashboard Cite

show abstract

“…The broad resonance observed most clearly by [6] at E cm =567 keV is excluded so that it will not contribute in any significant way to the astrophysical reaction rate. The resonance strengths for the other resonances were generally smaller than that previously observed, and the net interference effect at low energies was seen to be destructive.…”

Section: Pos(nic-ix)082mentioning

confidence: 99%

“…Unsurprisingly, there was discrepancy between the different measurements. One measurement observed an anomalously high partial width for the broad resonance at E cm =567 keV [6]. None of the measurements were sufficiently sensitive to determine the signs of the interference components which were expected to contribute almost 50% to the reaction rate at stellar temperatures [8,9].…”

Section: Introductionmentioning

confidence: 99%