Eur. Phys. J. A (2005) 25: 245-250
https://doi.org/10.1140/epjad/i2005-06-171-4

ENAM 2004

First experiments on transfer with radioactive beams using the TIARA array

¹ Department of Physics, University of Surrey, Surrey GU2 7XH, Guildford, UK
² Nuclear Structure Group, CCLRC Daresbury Laboratory, WA4 4AD, Daresbury, Warrington, UK
³ University of Paisley, PA1 2BE, Paisley, UK
⁴ Laboratoire de Physique Corpusculaire, IN2P3-CNRS, ISMRA and Université de Caen, F-14050, Caen, France
⁵ Instituto de Fıisica Corpuscular, CSIC-Universidad de Valencia, E-46071, Valencia, Spain
⁶ Department of Physics, The University of Liverpool, L69 7ZE, Liverpool, UK
⁷ GANIL, BP 55027, 14076, Caen Cedex 5, France

Received: 22 October 2004
Accepted: 25 April 2005
Published online: 11 August 2005

Abstract

Results from a study in inverse kinematics of the ²⁴Ne(d, pγ)²⁵Ne reaction, using a radioactive beam of ²⁴Ne from the SPIRAL facility at GANIL, are reported. First, a brief overview is given of several methods using radioactive beams to study the classic single-nucleon transfer reactions such as (d, p) or (d, t)/(d, ³He), where the experimental design is strongly influenced by the extreme inverse kinematics. A promising approach to deliver good energy resolution is to combine a high geometrical efficiency for kinematically complete charged particle detection with a high efficiency array for gamma-ray detection. One of the first dedicated set-ups for this type of experiment is the TIARA silicon strip array combined with the EXOGAM segmented germanium array. Together they comprise a highly compact, position-sensitive particle array with 90% of 4π coverage, mounted inside a cubic arrangement of four segmented gamma-ray detectors in very close geometry with 67% of 4π active coverage. Using this setup, the structure of ²⁵Ne has been studied via the (d, p) reaction. A pure ISOL beam of 10⁵ s^-1 of ²⁴Ne at 10 MeV/A was provided by SPIRAL and bombarded a CD₂ target of 1 mg/cm². The ²⁵Ne was detected at the focal plane of the VAMOS spectrometer where the direct beam was separated and intercepted. Reaction protons were detected in coincidence with little background. Four resolved peaks were recorded between E _x = 0 and 4 MeV. The data confirm and extend the results from a multinucleon transfer study using the (¹³C,¹⁴O) reaction. Further information has been obtained using the energies of coincident gamma-rays. The reactions ²⁴Ne(d, dγ)²⁴Ne, ²⁴Ne(d, t)²³Ne and ²⁴Ne(d, ³He)²³F were recorded simultaneously and analysis of these is also underway.