September 2020

Conference Paper

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

By:
Garrett, Paul; Radich, A.J.; Allmond, James M; Andreoiu, C.; Ball, G.C.; Bender, P.C.; Bianco, L.; Bildstein, V.; Bidaman, H.; Braid, R.; Burbadge, C.; Chagnon-Lessard, S.; Cross, D.S.; Deng, G.; Demand, G.A.; Diaz Varela, A.; Dunlop, R.; Dunlop, M.R.; Finlay, P.; Garnsworthy, A.B.; Grinyer, G.F.; Hackman, G.; Hadinia, B.; Ilyushkin, Sergey; Jigmeddorj, B.; Kisliuk, D.; Kuhn, K.; Laffoley, A.T.; Leach, K.G.; Maclean, A.D.; Michetti-Wilson, J.; Miller, D.; Moore, W.; Olaizola, B.; Orce, J.N.; Pearson, C.J.; Pore, J.L.; Rajabali, M.M.; Rand, E.T.; Sarazin, F.; Smith, J.K.; Starosta, K.; Sumithrarachchi, C.S.; Svensson, C. E.; Triambak, S.; Turko, J.; Wang, Z.M.; Wood, John; Wong, J.; Williams, S.J.; Yates, S. W.; Zganjar, E. F.
Journal Name:
Journal of Physics: Conference Series
Page Number:
1
Volume:
639
Issue Number:
012006
Publication Date:
September 10, 2020
Conference Name:
XXXVIII Symposium on Nuclear Physics (Cocoyoc 2015)
Conference Location:
Cocoyoc, Mexico
View DOI Listing:
https://doi.org/10.1088/1742-6596/639/1/012006

Abstract

The 8 pi spectrometer, installed at the TRIUMF-ISAC facility, was the world's most sensitive gamma-ray spectrometer dedicated to beta-decay studies. A description is given of the 8 pi spectrometer and its auxiliary detectors including the plastic scintillator array SCEPTAR used for beta-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 Cs-124 to study the nuclear structure of Xe-124, and how the beta-decay measurements complemented previous Coulomb excitation studies, is highlighted, including the extraction of the deformation parameters for the excited 0(+) bands in Xe-124. As a by-product, the decay scheme of the (7(+)) Cs-124 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 8 pi spectrometer, is given.

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