Far From ‘Easy’ Spectroscopy with the 8π and GRIFFIN Spectrometers at TRIUMF-ISAC

P E Garrett ,Z M Wang,E T Rand ,C Andreoiu ,D Kisliuk ,J L Pore ,William James Moore ,K G Leach ,A Diaz Varela ,H Bidaman ,A B Garnsworthy ,John L Wood ,J K Smith ,R Braid ,P C Bender ,C S Sumithrarachchi ,S Triambak ,B Hadinia ,P Finlay ,G C Ball ,D Miller ,F Sarazin ,G F Grinyer ,J Wong ,J Turko ,Guochu Deng ,J N Orce ,S J Williams ,K Kuhn ,B Olaizola ,C E Svensson ,K Starosta ,B Jigmeddorj ,A T Laffoley ,S Chagnon-Lessard ,G Hackman ,M M Rajabali ,J Michetti-Wilson ,A D Maclean ,R Dunlop ,L Bianco ,J M Allmond ,C Burbadge ,S W Yates ,D S Cross ,C J Pearson ,S Ilyushkin ,A J Radich ,V Bildstein ,G A Demand ,M R Dunlop ,E F Zganjar

doi:10.1088/1742-6596/639/1/012006

Abstract

The 8π spectrometer, installed at the TRIUMF-ISAC facility, was the world's most sensitive γ-ray spectrometer dedicated to β-decay studies. A description is given of the 8π spectrometer and its auxiliary detectors including the plastic scintillator array SCEPTAR used for β-particle tagging and the Si(Li) array PACES for conversion electron measurements, its moving tape collector, and its data acquisition system. The recent investigation of the decay of 124Cs to study the nuclear structure of 124Xe, and how the β-decay measurements complemented previous Coulomb excitation studies, is highlighted, including the extraction of the deformation parameters for the excited 0+ bands in 124Xe. As a by-product, the decay scheme of the (7+) 124Cs isomeric state, for which the data from the PACES detectors were vital, was studied. Finally, a description of the new GRIFFIN spectrometer, which uses the same auxiliary detectors as the 8π spectrometer, is given.

Highlights

Braid Far From 'Easy' Spectroscopy with the 8π and Gamma-Ray Infrastructure For Fundamental Investigations of Nuclei (GRIFFIN) Spectrometers at TRIUMF-ISAC Notes/Citation Information Published in Journal of Physics: Conference Series, v. 639, conference 1, article 012006, p. 1-15
The programme of γ-ray spectroscopy following β-decay at TRIUMF-ISAC is pursued along three main themes: high-precision measurements of nuclei for tests of the Standard Model, mainly associated with Fermi super-allowed β+ emitters; studies of nuclei near stability emphasizing high-statistics for both γ-γ and γ-e− coincidences to test the nature of excited states, especially collective states; and studies of nuclei far from stability to elucidate the evolution of structure at the extremes of N/Z ratios
The 8π spectrometer is described in some detail and selected recent results obtained will be outlined, concentrating mainly on the spectroscopy of 124Xe following the decay of 124Cs, as well as the elucidation of the decay scheme of the 124Csm isomeric state, that highlight some of the capabilities of the 8π spectrometer and its auxiliary detectors

Summary

Andreoiu

Right click to open a feedback form in a new tab to let us know how this document benefits you. Follow this and additional works at: https://uknowledge.uky.edu/chemistry_facpub Part of the Chemistry Commons. C.; Bianco, L.; Bildstein, V.; Bidaman, H.; and Braid, R., "Far From 'Easy' Spectroscopy with the 8π and GRIFFIN Spectrometers at TRIUMF-ISAC" (2015). Braid Far From 'Easy' Spectroscopy with the 8π and GRIFFIN Spectrometers at TRIUMF-ISAC Notes/Citation Information Published in Journal of Physics: Conference Series, v. This article is available at UKnowledge: https://uknowledge.uky.edu/chemistry_facpub/60. Far From ‘Easy’ Spectroscopy with the 8π and GRIFFIN Spectrometers at TRIUMF-ISAC.

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