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: G13.00002 : In-beam γ-ray spectroscopy and lifetime measurements in the neutron-deficient phosphorus isotopes*
8:42 AM–8:54 AM
View Presentation Abstract
Presenter:
Brenden Longfellow
(National Superconducting Cyclotron Laboratory, Michigan State University)
Authors:
Brenden Longfellow
(National Superconducting Cyclotron Laboratory, Michigan State University)
Alexandra Gade
(National Superconducting Cyclotron Laboratory, Michigan State University)
B. Alex Brown
(National Superconducting Cyclotron Laboratory, Michigan State University)
Werner A. Richter
(iThemba LABS, University of Stellenbosch)
Daniel Bazin
(National Superconducting Cyclotron Laboratory)
Peter C. Bender
(National Superconducting Cyclotron Laboratory)
Michael Bowry
(National Superconducting Cyclotron Laboratory)
Brandon Elman
(National Superconducting Cyclotron Laboratory, Michigan State University)
Eric Lunderberg
(National Superconducting Cyclotron Laboratory, Michigan State University)
Dirk Weisshaar
(National Superconducting Cyclotron Laboratory)
Scott J. Williams
(National Superconducting Cyclotron Laboratory)
The properties of the neutron-deficient phosphorus isotopes have prompted a number of experimental and theoretical studies with focuses on both nuclear structure and nuclear astrophysics. Here we present results from in-beam γ-ray spectroscopy experiments performed at the National Superconducting Cyclotron Laboratory with the high-efficiency CsI(Na) array CAESAR and the high-resolution segmented Ge array SeGA. A new level in the drip-line nucleus 26P was observed, the energy of the dominant resonance in 27P for the (p,γ) reaction rate was confirmed, and lifetimes of excited states in 28P were measured for the first time. Shell-model calculations using the USDB-CDPN interaction were performed with the single-particle energy of the 1s1/2 proton orbital lowered to reproduce the observed Thomas-Ehrman shifts and electromagnetic transition probabilities in 28P and its mirror nucleus were compared.
*This work was supported by the NSF under Grants No. PHY-1102511 and No. PHY1565546, by the DOE NNSA through the NSSC, under Award No. DE-NA0003180, and by the DOE, Office of Nuclear Physics, under Grant No. DEFG02-08ER41556. B.A.B. acknowledges support from NSF Grant No. PHY-1404442. W.A.R. is supported by the National Research Foundation of South Africa Grant No. 105608.
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