The European Physical Journal A (EPJ A)

Issue		Eur. Phys. J. A Volume 25, Number 3, September 2005
Page(s)		455 - 466
DOI		10.1140/epja/i2005-10138-7
Published online		12 October 2005

Eur. Phys. J. A 25, 455-466 (2005)
DOI: 10.1140/epja/i2005-10138-7

S-factor of ¹⁴N(p,γ)¹⁵O at astrophysical energies

G. Imbriani¹, H. Costantini², A. Formicola³, A. Vomiero⁴, C. Angulo⁵, D. Bemmerer⁶, R. Bonetti⁷, C. Broggini⁶, F. Confortola², P. Corvisiero², J. Cruz⁸, P. Descouvemont⁹, Z. Fülöp^{1, 10}, G. Gervino^{1, 11}, A. Guglielmetti⁷, C. Gustavino³, Gy. Gyürky^{1, 10}, A. P. Jesus⁸, M. Junker³, J. N. Klug^{1, 12}, A. Lemut², R. Menegazzo⁶, P. Prati⁴, V. Roca¹, C. Rolfs^{1, 12}, M. Romano¹, C. Rossi-Alvarez⁶, F. Schümann^{1, 12}, D. Schürmann^{1, 12}, E. Somorjai^{1, 10}, O. Straniero^{1, 13, 14}, F. Strieder^{1, 12}, F. Terrasi^{1, 14, 15} and H. P. Trautvetter^{1, 12}

¹ Dipartimento di Fisica and INFN, Università di Napoli "Federico II", Napoli, Italy
² Dipartimento di Fisica and INFN, Università di Genova, Genova, Italy
³ Laboratori Nazionali del Gran Sasso dell'INFN, Assergi, Italy
⁴ Dipartimento di Fisica and INFN, Università di Padova, Legnaro, Italy
⁵ Centre de Recherches du Cyclotron, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
⁶ INFN, Padova, Italy
⁷ Dipartimento di Fisica and INFN, Università di Milano, Milano, Italy
⁸ Centro de Fisica Nuclear da Universidade de Lisboa, Lisboa, Portugal
⁹ Physique Nucléaire Théorique et Physique Mathématique, Université Libre de Bruxelles, CP 229, Brussels, Belgium
¹⁰ Atomki, Debrecen, Hungary
¹¹ Dipartimento di Fisica Sperimentale and INFN, Università di Torino, Torino, Italy
¹² Institut für Physik mit Ionenstrahlen, Ruhr-Universität Bochum, Bochum, Germany
¹³ Osservatorio Astronomico Collurania, Teramo, Italy
¹⁴ INFN, Napoli, Italy
¹⁵ Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Caserta, Italy

gianluca.imbriani@na.infn.it

(Received 17 June 2005 / Published online 12 October 2005)

Abstract

The astrophysical S(E) factor of ¹⁴N(p,γ)¹⁵O has been measured for effective center-of-mass energies between E _eff = 119 and 367 keV at the LUNA facility using TiN solid targets and Ge detectors. The data are in good agreement with previous and recent work at overlapping energies. R-matrix analysis reveals that due to the complex level structure of ¹⁵O the extrapolated S(0) value is model dependent and calls for additional experimental efforts to reduce the present uncertainty in S(0) to a level of a few percent as required by astrophysical calculations.

PACS
25.40.Lw - Radiative capture.
26.20.+f - Hydrostatic stellar nucleosynthesis.
26.65.+t - Solar neutrinos.
29.30.Kv - X- and γ-ray spectroscopy.

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