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The capture reactions 15N(α,γ)19F and 20Ne(α,γ)24Mg at astrophysically relevant energies

✍ Scribed by S. Wilmes; V. Kölle; U. Kölle; G. Staudt; P. Mohr; J.W. Hammer; A. Mayer

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
214 KB
Volume
621
Category
Article
ISSN
0375-9474

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✦ Synopsis

The capture reactions 15N(c~,-y)IgF and 2°Ne(a, 7)24Mg have been studied using a windowless gas target system and a 100% relative efficiency germanium detector with an active BGO shielding. For the 15N(c~, 7)19F reaction 14 resonances have been analyzed in the range 650 keV < Ea,lab < 2650 keV, branching ratios and resonance strengths have been deduced. For the 2°Ne(a,7)24Mg reaction up to now 10 resonances have been investigated in the range 1640 keV < Ea,lab < 2650 keV. Due to the effective background reduction resonance strengths of weak resonances could be deduced. In near future the study will be extended to lower energies.

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✍ M. Dufour; P. Descouvemont 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 169 KB

We investigate the 15 N(α, γ ) 19 F and 15 O(α, γ ) 19 Ne reactions by using a multicluster description of 15 N and 15 O. The 15 N(α, γ ) 19 F and 15 O(α, γ ) 19 Ne wave functions are defined in the Generator Coordinate Method, using α and triton (or 3 He) wave functions. The band structure and the