Fragment angular correlation in the breakup of 16O ions at 95 MeV/A

✍ Scribed by V. Tatischeff; J. Kiener; P. Aguer; G. Bogaert; A. Coc; D. Disdier; T. Ichihara; L. Kraus; A. Lefebvre; I. Linck; W. Mittig; T. Motobayashi; F. de Oliveira Santos; P. Roussel-Chomaz; C. Stephan; J.P. Thibaud

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 852 KB
• Volume: 633
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(98)00137-7

✦ Synopsis

Fragment angular correlations in projectile breakup reactions are very sensitive to interference between different multipolarities entering in the excitation-dissociation process of the projectile. In particular, it was proposed to disentangle L = 1 and L = 2 contributions in direct breakup reactions of 160 with low relative energy between the a and J2C fragment, which are of astrophysical interest. We studied the experimental aspects of extracting those angular correlations in extreme kinematical conditions usually encountered in breakup experiments of astrophysical interest. The breakup of 95 MeV/A ~60 projectiles induced by a 2°8pb target was measured using the highresolution spectrometer SPEG at Ganil for the coincident detection of the fragments. Sequential breakup via the 12.53 MeV level of 160 is analyzed in this framework and it favors an one-step M2 excitation of this level. (~) 1998 Elsevier Science B.V.