A dedicated decay-spectroscopy station for the collinear resonance ionization experiment at ISOLDE

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2013, Vol.707, p.35-39
• Main Authors: Rajabali, M.M., Lynch, K.M., Cocolios, T.E., Billowes, J., Bissell, M.L., De Schepper, S., Dewolf, K., Flanagan, K.T., Le Blanc, F., Marsh, B.A., Mason, P.J.R., Matea, I., Neyens, G., Papuga, J., Procter, T.J., Rothe, S., Simpson, G.S., Smith, A.J., Stroke, H.H., Verney, D., Walker, P.M., Wendt, K., Wood, R.T.
• Format: Article
• Language: English
• Subjects: Alpha decay; Carbon; Decay; Detectors; Fission products; Foils; formula omitted; Implantation; Ionization; Laser-assisted decay spectroscopy; Nuclear Experiment; Particle physics; Physics; Stations
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2012.12.090

A new decay-spectroscopy station (DSS) has been developed to be coupled to the collinear resonance ionization spectroscopy (CRIS) beam line at CERN-ISOLDE. The system uses a rotatable wheel with ten 20μg/cm2 carbon foils as beam implantation sites for the efficient measurement of charged decay products. Silicon detectors are placed on either side of the carbon foil in an optimal geometry to cover a large solid angle for detecting these charged particles. In addition to the silicon detectors at the on-beam axis position, a second pair of off-beam axis detectors are placed at the wheel position 108° away, allowing longer-lived species to be studied. Up to three high purity germanium detectors can be placed around the chamber for particle-gamma correlated measurement. The radioactive beam is transported through the CRIS beam line before implantation into a carbon foil at the DSS. All materials used in the DSS are UHV-compatible to maintain high vacuum conditions required by the CRIS beam line. This paper describes the DSS and presents the first data collected at the setup during the commissioning run with 221Fr. ► A dedicated decay-spectroscopy station (DSS) has been developed and commissioned. ► The DSS is coupled to the CRIS beam line, which will clean RIB beams from ISOLDE. ► The DSS is capable of Fission, alpha, beta and gamma laser assisted spectroscopy. ► Technical aspects of the DSS are presented. ► Data from the DSS commissioning run with 221Fr are presented.