Searching for particle-hole cluster bands in ⁸Be using the ISOLDE Solenoidal Spectrometer

¹ Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield, UK
² Laboratory for Nuclear Science, University of Connecticut, Groton, CT 06340, USA
³ School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK
⁴ Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, UK
⁵ Department of Physics, University of Manchester, Manchester, M13 9PL, UK
⁶ CERN, Geneva 23 CH-1211, Switzerland
⁷ Nuclear Physics Group, UKRI-STFC Daresbury Laboratory, Daresbury, WA4 4AD, UK
⁸ Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla, Spain
⁹ College of Science Imam Mohammad Ibn Saud Islamic University Riyadh, Saudi Arabia

^* e-mail: k.haverson@shu.ac.uk
^** e-mail: robin.smith@shu.ac.uk

Published online: 28 October 2024

Abstract

The ⁷Be(d, p)⁸Be^∗ reaction was measured in inverse kinematics at a beam energy of 11 MeV/u using the ISOLDE Solenoidal Spectrometer, in order to identify and characterise high-excitation states in ⁸Be. The spin-parities of many of the states in the 16−20 MeV region can be explained as being particle-hole excitations within a two-centre shell model. The present experiment aims to elucidate the spin parities of higher excited states, > 20 MeV, to assess their candidacy as rotational excitations of the aforementioned particlehole states. The beam intensity in this experiment was measured using a downstream Micron S1 double-sided silicon strip detector to pick up elastically scattered deuterons. The focus of this paper is to present methods for calculating the beam intensity, which is key for extracting the spectroscopic factors of the measured states. Preliminary excitation spectra are also presented.