Speaker
Dr
Stephanie Lyons
(National Superconducting Cyclotron Laboratory)
Description
The rapid neutron-capture process, or r-process, is known to produce roughly half of the isotopes of heavy elements. Sensitivity studies have shown that the final abundance distributions of r-process nuclei are greatly impacted by nuclear masses, neutron-capture rates, and $\beta$-decay properties. For this reason, $\beta$-decay intensities for $^{69,71}$Co were measured using the technique of total absorption spectroscopy at the NSCL. This technique allows us to overcome the so-called ``pandemonium effect," which can cause $\beta$-feeding intensities to high-lying excitation energies to be missed in traditional $\beta$-decay experiments. The high Q-value of these isotopes allow for the study of $\beta$-decay properties over a broad energy range. The resultant $\beta$-decay intensities and deduced Gamow-Teller strengths will be compared to QRPA calculations, which are commonly used in r-process calculations.
Primary author
Dr
Stephanie Lyons
(National Superconducting Cyclotron Laboratory)
Co-authors
Aaron Couture
(Los Alamos National Laboratory)
Prof.
Alex Brown
(National Superconducting Cyclotron Laboratory)
Mr
Alex Dombos
(NSCL / MSU)
Dr
Ann-Cecilie Larsen
(University of Oslo)
Artemis Spyrou
(NSCL/MSU)
Dr
Benjamin Crider
(Mississippi State University)
Dr
Christopher Prokop
(LANL)
Dr
Darren Bleuel
(Lawerance Livermore National Laboratory)
Farheen Naqvi
(National Superconducting Cyclotron Laboratory)
Georgios Perdikakis
(Central Michigan University)
Lucia Crespo Campo
(University of Oslo)
Prof.
Magne Guttormsen
(University of Oslo)
Dr
Matthew Mumpower
(Los Alamos National Lab)
Dr
Peter Moller
(Los Alamos National Laboratory)
Rebecca Lewis
(NSCL/MSU)
Rebecca Surman
(University of Notre Dame)
Prof.
Sean Liddick
(NSCL / MSU)
Dr
Shea Mosby
(Los Alamos National Laboratory)
Dr
Stephen Quinn
(National Superconducting Cyclotron Laboratory)
Prof.
Sunniva Siem
(University of Oslo)
Dr
Therese Renstom
(University of Oslo)