First direct measurement of the total cross-section of 12C(α,γ)16O

D. Schürmann; A. Di Leva; L. Gialanella; D. Rogalla; F. Strieder; N. De Cesare; A. D'Onofrio; G. Imbriani; R. Kunz; C. Lubritto; A. Ordine; V. Roca; C. Rolfs; M. Romano; F. Schümann; F. Terrasi; H. -P. Trautvetter

doi:10.1140/epja/i2005-10175-2

EPJ

First direct measurement of the total cross-section of ¹²C(α,γ)¹⁶O

D. Schürmann¹, A. Di Leva¹, L. Gialanella², D. Rogalla³, F. Strieder¹^*, N. De Cesare⁴, A. D'Onofrio³, G. Imbriani², R. Kunz¹, C. Lubritto³, A. Ordine², V. Roca², C. Rolfs¹, M. Romano², F. Schümann¹, F. Terrasi³ and H. -P. Trautvetter¹

¹ Institut für Experimentalphysik III, Ruhr-Universität Bochum, Bochum, Germany
² Dipartimento di Scienze Fisiche, Università Federico II, Napoli and INFN, Napoli, Italy
³ Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Caserta and INFN, Napoli, Italy
⁴ Dipartimento di Scienze della Vita, Seconda Università di Napoli, Caserta and INFN, Napoli, Italy

Received: 29 September 2005
Accepted: 21 November 2005
Published online: 29 November 2005

Abstract

The total cross-section of ¹²C(α,γ)¹⁶O was measured for the first time by a direct and ungated detection of the ¹⁶O recoils. This measurement in inverse kinematics using the recoil mass separator ERNA in combination with a windowless He gas target allowed to collect data with high precision in the energy range E = 1.9 to 4.9 MeV. The data represent new information for the determination of the astrophysical S(E) factor.

PACS: 25.55.-e ³H-, ³He-, and ⁴He-induced reactions – / 26.20.+f Hydrostatic stellar nucleosynthesis –

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EPJ

First direct measurement of the total cross-section of 12C(α,γ)16O

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First direct measurement of the total cross-section of ¹²C(α,γ)¹⁶O