High Resolution γ-Ray Spectroscopy Using GALILEO Array

Abstract

The GALILEO γ-ray spectrometer has been constructed at the Legnaro National Laboratory of INFN (LNL-INFN). It can be coupled to advanced ancillary devices which allows nuclear structure studies employing the variety of in-beam γ-ray spectroscopy methods. Such studies benefit from reactions induced by the intense stable beams delivered by the Tandem-ALPI-PIAVE accelerator complex and by the radioactive beams which will be provided by the SPES facility. In this paper we outline two experiments performed within the experimental campaign at GALILEO coupled to the EUCLIDES Si-ball and the Neutron Wall array. The first one was aimed at spectroscopic studies in A=31 mirror nuclei and the second one at measurements of lifetimes of excited states in nuclei in the vicinity of 100 Sn.

Shape coexistence in neutron-deficient Hg188 investigated via lifetime measurements

“…The 34 beam was provided by the Tandem-ALPI accelerator complex [33,34] of the Laboratori Nazionali di Legnaro (Italy). The γ rays resulting from the reactions were detected by the GALILEO spectrometer, an array of 25 Compton-shielded HPGe detectors, arranged into three rings at backward angles (152 • , 129 • , 119 • ) and one ring at 90 • [35] with respect to the beam direction. The neutrons evaporated in the reaction were detected using the Neutron Wall array [36], composed of 45 014318-4 liquid scintillators placed at forward angles with respect to the beam direction.…”