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

38th Symposium on Nuclear Physics

Garrett, P.E.^1 ; Radich, A.J.^1 ; Allmond, J.M.^2 ; Andreoiu, C.^3 ; Ball, G.C.^4 ; Bender, P.C.^4,11 ; Bianco, L.^1,12 ; Bildstein, V.^1 ; Bidaman, H.^1 ; Braid, R.^5 ; Burbadge, C.^1 ; Chagnon-Lessard, S.^1,13 ; Cross, D.S.^3 ; Deng, G.^1 ; Demand, G.A.^1 ; Varela, A Diaz^1 ; Dunlop, M.R.^1 ; Dunlop, R.^1 ; Finlay, P.^1,14 ; Garnsworthy, A.B.^4 ; Grinyer, G.F.^1,15 ; Hackman, G.^4 ; Hadinia, B.^1 ; Ilyushkin, S.^5 ; Jigmeddorj, B.^1 ; Kisliuk, D.^1 ; Kuhn, K.^5 ; Laffoley, A.T.^1 ; Leach, K.G.^1,3,4 ; Maclean, A.D.^1 ; Michetti-Wilson, J.^1 ; Miller, D.^4 ; Moore, W.^5 ; Olaizola, B.^1 ; Orce, J.N.^4,6 ; Pearson, C.J.^4 ; Pore, J.L.^3 ; Rajabali, M.M.^4,16 ; Rand, E.T.^1 ; Sarazin, F.^5 ; Smith, J.K.^4 ; Starosta, K.^3 ; Sumithrarachchi, C.S.^1,11 ; Svensson, C.E.^1 ; Triambak, S.^4,6,7 ; Turko, J.^1 ; Wang, Z.M.^3,4 ; Wood, J.L.^8 ; Wong, J.^1 ; Williams, S.J.^4,11 ; Yates, S.W.^9 ; Zganjar, E.F.^10

Department of Physics, University of Guelph, Guelph

ON

N1G2W1, Canada^1

Physics Division, Oak Ridge National Laboratory, Oak Ridge

TN

37831, United States^2

Department of Chemistry, Simon Fraser University, Burnaby

BC

V5A1S6, Canada^3

TRIUMF, 4004 Wesbrook Mall, Vancouver

BC

V6T 2A3, Canada^4

Department of Physics, Colorado School of Mines, Golden

CO

80401, United States^5

Department of Physics, University of the Western Cape, P/B X17, Bellville

ZA-7535, South Africa^6

IThemba LABS, P.O. Box 722, Somerset West

7129, South Africa^7

School of Physics, Georgia Institute of Technology, Atlanta

GA

30332-0430, United States^8

Departments of Chemistry and Physics and Astronomy, University of Kentucky, Lexington

KY

40506-0055, United States

(10) Department of Physics and Astronomy, Louisiana State University, Baton Rouge

LA

70803, United States

(11) National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing

MI

48824, United States

(12) DESY Photon Science, Notkestrasse 85, Hamburg

D-22607, Germany

(13) Department of Physics, University of Ottawa, 150 Louis-Pasteur, Ottawa

ON

K1N 6N5, Canada

(14) Instituut voor Kern-en Stralingsfysica, K.U. Leuven, Celestijnenlaan 200D, Leuven

B-3001, Belgium

(15) Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bvd Henri Becquerel, Caen

14076, France

(16) Department of Physics, Tennessee Technological University, Cookeville

TN

38505, United States^9

关键词: Beta particles;    Conversion electrons;    Coulomb excitation;    Decay scheme;    Deformation parameter;    Isomeric state;    Nuclear structure;    Plastic scintillator arrays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/639/1/012006/pdf
DOI  :  10.1088/1742-6596/639/1/012006

来源: IOP

【 摘 要 】

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 of124Cs to study the nuclear structure of124Xe, 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 in124Xe. 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.