Neutron correlations in 6He viewed through nuclear break-up

M. Assié; J. A. Scarpaci; D. Lacroix; J. C. Angélique; D. Bazin; D. Beaumel; Y. Blumenfeld; W. N. Catford; M. Chabot; A. Chatterjee; M. Fallot; H. Iwasaki; F. Maréchal; D. Mengoni; C. Monrozeau; J. Nyberg; C. Petrache; F. Skaza; T. Tuna

doi:10.1140/epja/i2009-10787-4

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A (2009) 42: 441-446
https://doi.org/10.1140/epja/i2009-10787-4

Regular Article - Experimental Physics

Neutron correlations in ⁶He viewed through nuclear break-up

M. Assié¹^*, J. A. Scarpaci¹, D. Lacroix², J. C. Angélique³, D. Bazin⁴, D. Beaumel¹, Y. Blumenfeld¹, W. N. Catford⁵, M. Chabot¹, A. Chatterjee⁹, M. Fallot⁶, H. Iwasaki¹, F. Maréchal¹, D. Mengoni⁷, C. Monrozeau¹, J. Nyberg⁸, C. Petrache¹, F. Skaza¹ and T. Tuna¹

¹ Institut de Physique Nucléaire, Université Paris-Sud-11-CNRS/IN2P3, 91406, Orsay, France
² GANIL, BP 5027, 14076, Caen Cedex 5, France
³ LPC/ENSICAEN, Blvd du Maréchal Juin, 14050, Caen Cedex, France
⁴ National Superconducting Cyclotron Laboratory, Michigan State University, 48824-1321, East-Lansing, MI, USA
⁵ School of Electronics and Physical Sciences, University of Surrey, GU2 7XH, Guildford, UK
⁶ Subatech, 4 rue Alfred Kastler, BP 20722, F-44307, Nantes Cedex 3, France
⁷ Dipartimento di Fisica, Università di Camerino and INFN, Sezione di Perugia, I-62032, Camerino, Italy
⁸ Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
⁹ Nuclear Physics Division, Bhabha Atomic Research Centre, 400085, Mumbai, India

^* e-mail: assie@ganil.fr

Received: 3 December 2008
Revised: 19 February 2009
Accepted: 23 February 2009
Published online: 10 May 2009

Abstract

The nuclear break-up of ⁶He on a ²⁰⁸Pb target was studied at 20A MeV using a secondary beam of ⁶He produced by the SPIRAL facility at GANIL. -particles were detected in coincidence with two neutrons with a large angular coverage and the reaction mechanism was identified. From the distribution of the relative angles between the two neutrons the correlation function was extracted. It shows a strong correlation at small relative angles attributed to the contribution of the di-neutron configuration of ⁶He .