Eur. Phys. J. A (2016) 52: 271
https://doi.org/10.1140/epja/i2016-16271-2

Regular Article - Experimental Physics

Complete kinematical study of the 3 breakup of the 16.11 MeV state in ¹²C

Department of Physics and Astronomy, Aarhus University, DK-8000, Aarhus C, Denmark

^* e-mail: fynbo@phys.au.dk

Received: 6 April 2016
Accepted: 7 July 2016
Published online: 9 September 2016

Abstract

The reaction ¹¹ B + p has been used to populate the state at an excitation energy of 16.11 MeV in ¹²C, and the breakup of the state into three -particles has been studied in complete kinematics. A two-step breakup model which includes interference effects is found to provide the most accurate description of the experimental data. The branching ratio to the ground state of ⁸Be is determined to be 5.1(5)% in agreement with previous findings, but more precise by a factor of two, while the decay to the first excited state in ⁸Be is found to be dominated by d-wave emission.