Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session G13: Nuclear Structure
8:30 AM–10:18 AM,
Sunday, April 14, 2019
Sheraton
Room: Plaza Court 2
Sponsoring
Unit:
DNP
Chair: Alexandra Gade, Michigan State University/ NSCL
Abstract: G13.00004 : Recent updates on the structure of 77Ga from high-resolution β decay study of neutron-rich 77Zn*
9:06 AM–9:18 AM
View Presentation Abstract
Presenter:
Durga Siwakoti
(Department of Physics and Astronomy, Mississippi State University)
Authors:
Durga Siwakoti
(Department of Physics and Astronomy, Mississippi State University)
S.V. Ilyushkin
(Colorado School of Mines)
J.A. Winger
(Mississippi State University)
C.J. Gross
(Physics Division, ORNL)
K.P. Rykaczewski
(Physics Division, ORNL)
J.C. Batchelder
(UNIRIB, OakRidge, TN)
L. Cartegni
(University of Tennessee)
I.G. Darby
(University of Tennessee)
C. Goodin
(Vanderbilt University, TN)
Robert K. Grzywacz
(University of Tennessee)
J.H. Hamilton
(Vanderbilt University, TN)
A. Krogul
(University of Warsaw, Poland)
W. Krolas
(Poland Academy of Sciences, Poland)
S. Liddick
(NSCL, Michigan State University)
C. Mazzocchi
(Univ degil Studi di Milano and INFN)
S. Padgett
(University of Tennessee)
A. Piechaczek
(Louisiana State University)
M.M. Rajabali
(Tennessee Tech University)
D. Shapira
(ORNL, TN)
E.F. Zganjar
(Louisiana State University)
Study on the β decay of 77Zn into 77Ga is presented with updates on the decay scheme and structure of 77Ga. The present study utilized a more efficient detector setup along with high purity of the 77Cu beam in comparison to previous studies. The purity of beam used prevented any member of the decay chain from being dominant and allowed for comparisons of branching rations between the decays. The greater efficiency of the HPGe clover detectors array means more low energy γ-rays were detected in the decays. The γ-γ and β-γ coincidence data obtained from the experiment were used to develop a revised decay scheme using an objective method. In this method, the standard Gaussian function was used to fit each peak in the γ-γ spectra to determine the peak area on both a peak gate and an adjacent background gate. This enabled us to identify the statistically significant γ-γ coincidence peaks to be used in developing the decay scheme.
*Office of Science, DOE Grant Nos. DE-FG02-96ER41006 and DE-SC0014448. The work is also supported by DOE contract Nos. DE-AC05-00OR22725, DE-FG02-96ER40983, DE-AC05-06OR23100, DE-FG02-96ER40978, DE-FG05-88ER40407, DEFC03-03NA00143, Polish Ministry of Science Grant No. N N202 1033 33 and Foundation for Polish Science.
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