Abstract
A new decay-spectroscopy station (DSS2.0) has been designed by the CRIS collaboration for use at the radioactive ion beam facility, ISOLDE. With the design optimised for both charged-particle and γ-ray detection, the DDS2.0 allows high-efficiency decay spectroscopy to be performed. The DSS2.0 complements the existing decay-spectroscopy system at the CRIS experiment, and together provide the ability to perform laser-assisted nuclear decay spectroscopy on both ground state and long-lived isomeric species. This paper describes the new decay-spectroscopy station and presents the characterisation studies that have recently been performed.
Highlights
The CERN-ISOLDE facility [1,2] provides beams of radioactive isotopes, ranging from 2He to 92U, to a variety of experimental setups
We present the design of a new decay spectroscopy station, with the primary focus of increased γ-ray detection efficiency and versatility, alongside its offline-characterisation studies
Its main purpose is the study of charged-particle and γ decays at collinear resonance ionization spectroscopy (CRIS) and is made in a compact geometry with thin aluminium walls
Summary
The CERN-ISOLDE facility [1,2] provides beams of radioactive isotopes, ranging from 2He to 92U, to a variety of experimental setups. The high resolution of the CRIS experiment can be used to separate isotopes from isobaric contamination, and even isomers from each other This was successfully demonstrated and allowed the first measurement of the branching ratios in the decay of 204 m2Fr [11] and 206 m2Fr [12]. These campaigns were performed using the decay spectroscopy station DSS [15], which has been tailored to maintain the high vacuum required by the CRIS experiment, at the expense of γ-ray detection efficiency (
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