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

Conference · Thu Jan 01 00:00:00 EST 2015

OSTI ID:1261492

Garrett, Paul ^[1]; Radich, A.J. ^[1]; Allmond, James  ^[2]; Andreoiu, C. ^[3]; Ball, G.C. ^[4]; Bender, P.C. ^[4]; Bianco, L. ^[1]; Bildstein, V. ^[1]; Bidaman, H. ^[1]; Braid, R. ^[5]; Burbadge, C. ^[1]; Chagnon-Lessard, S. ^[1]; Cross, D.S. ^[3]; Deng, G. ^[1]; Demand, G.A. ^[1]; Diaz Varela, A. ^[1]; Dunlop, R. ^[1]; Dunlop, M.R. ^[1]; Finlay, P. ^[1]; Garnsworthy, A.B. ^[4] ; Grinyer, G.F. ^[1]; Hackman, G. ^[4]; Hadinia, B. ^[1]; Ilyushkin, Sergey ^[5]; Jigmeddorj, B. ^[1]; Kisliuk, D. ^[1]; Kuhn, K. ^[5]; Laffoley, A.T. ^[1]; Leach, K.G. ^[1]; Maclean, A.D. ^[1]; Michetti-Wilson, J. ^[1]; Miller, D. ^[4]; Moore, W. ^[5]; Olaizola, B. ^[1]; Orce, J.N. ^[6]; Pearson, C.J. ^[4]; Pore, J.L. ^[3]; Rajabali, M.M. ^[4]; Rand, E.T. ^[1]; Sarazin, F. ^[5]; Smith, J.K. ^[4]; Starosta, K. ^[3]; Sumithrarachchi, C.S. ^[1]; Svensson, C. E. ^[1]; Triambak, S. ^[4]; Turko, J. ^[1]; Wang, Z.M. ^[3]; Wood, John L. ^[7]; Wong, J. ^[1]; Williams, S.J. ^[4]; Yates, S. W. ^[8]; Zganjar, E. F. ^[9]

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1. University of Guelph, Canada
2. ORNL
3. Simon Fraser University, Canada
4. TRIUMF, Canada
5. Colorado School of Mines, Golden
6. University of the Western Cape, South Africa
7. Georgia Institute of Technology, Atlanta
8. University of Kentucky
9. Louisiana State University

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1261492
• Resource Relation: Conference: XXXVIII Symposium on Nuclear Physics (Cocoyoc 2015) - Cocoyoc, , Mexico - 1/6/2015 12:00:00 AM-
• Country of Publication: United States
• Language: English