Masters Theses

Date of Award


Degree Type


Degree Name

Master of Science



Major Professor

Robert Grzywacz

Committee Members

Katherine Grzywacz-Jones, Miguel Madurga Flores


One of the most prevalent decay modes of unstable nuclei is β[beta] decay. For nuclei far from stability these decays can be followed by the emission of a neutron. The Versatile Array of Neutron Detectors at Low Energy (VANDLE) is a proven detection system for measuring the energies of delayed neutrons. VANDLE has been upgraded to include high-efficiency scintillators for gamma-ray detection. This increases the sensitivity for the γ[gamma]-rays that can follow the neutron emission. These scintillator components form an array of large volume NaI detectors and the Hybrid Array of Gamma-Ray Detectors (HAGRiD), which is an array of LaBr3[LaBr3] scintillators (BrilLanCe 380™). An experimental campaign at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory was completed in the Spring of 2016. Beams of several 238U[238U] fission fragments were delivered to VANDLE. Some of the advantages and drawbacks of the new γ[gamma]-ray systems, in particular HAGRiD, will be presented in this work through the results for the decays of two neutron rich Rubidium isotopes (94Rb [94Rb] and 97Rb [97Rb]).

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