Direct Measurement of Carbon Fusion at Astrophysical Energies with Gamma-Particle Coincidences

M. Heine; G. Fruet; S. Courtin; D.G. Jenkins; P. Adsley; A. Brown; R. Canavan; W.N. Catford; E. Charon; D. Curien; S. Della Negra; J. Duprat; F. Hammache; J. Lesrel; G. Lotay; A. Meyer; E. Monpribat; D. Montanari; L. Morris; M. Moukaddam; J. Nippert; Zs. Podolyák; P.H. Regan; I. Ribaud; M. Richer; M. Rudigier; R. Shearman; N. de Séréville; C. Stodel

doi:10.1051/epjconf/202226001004

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Open Access

EPJ Web of Conferences 260, 01004 (2022)
https://doi.org/10.1051/epjconf/202226001004

Direct Measurement of Carbon Fusion at Astrophysical Energies with Gamma-Particle Coincidences

M. Heine¹^*, G. Fruet¹, S. Courtin¹^,2, D.G. Jenkins³, P. Adsley⁴, A. Brown³, R. Canavan⁵^,6, W.N. Catford⁵, E. Charon⁷, D. Curien¹, S. Della Negra⁴, J. Duprat⁸, F. Hammache⁴, J. Lesrel⁴, G. Lotay⁵, A. Meyer⁴, E. Monpribat¹, D. Montanari¹^,2, L. Morris³, M. Moukaddam¹, J. Nippert¹, Zs. Podolyák⁵, P.H. Regan⁵^,6, I. Ribaud⁴, M. Richer¹, M. Rudigier⁵, R. Shearman⁵^,6, N. de Séréville⁴ and C. Stodel⁹

¹ Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
² USIAS/Université de Strasbourg, Strasbourg, F-67083, France
³ University of York, York, YO10 5DD, UK
⁴ IPN, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, France
⁵ Department of Physics, University of Surrey, Guildford, GU2 7XH, UK
⁶ National Physical Laboratory, Teddington, Middlesex, TW110 LW, UK
⁷ NIMBE, CEA, CNRS, Université Paris-Saclay CEA Saclay F-91191 Gif sur Yvette, France
⁸ CSNSM, Université Paris Sud, UMR 8609-CNRS/IN2P3, F-91405 Orsay, France
⁹ GANIL, CEA/DSM-CNRS/IN2P3, Caen, F-14076, France

^* e-mail: marcel.heine@iphc.cnrs.fr

Published online: 24 February 2022

Abstract

We present ¹²C+¹²C direct fusion measurements with STELLA UKFATIMA, that reach into the region of astrophysics interest relevant to massive stars (M_⊙ ≈ 25) using self-supporting thin rotating carbon foils [1]. We demonstrate that detecting gammas and light charged particles in coincidence with nanosecond timing is key for effective background reduction achieving reliable measurements in the sub-nanobarn range. We give details about core developments of the detection apparatus as well as the coincidence-analysis procedure of low count statistics. The present data largely follows the phenomenological hindrance interpolation and shows indication for resonant behaviour at the lowest energy explored.

© The Authors, published by EDP Sciences, 2022

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