Date of Award


Degree Type


Degree Name

Doctor of Philosophy



Major Professor

Robert Grzywacz

Committee Members

Soren Sorensen, Thomas Papenbrock, Guillermo Ivan Maldonado


The search for new alpha-emitters in the region above tin-100 was carried out in Japan Atomic Energy Agency (JAEA) tandem accelerator in Tokai, Japan. This work aimed to discover barium-113 produced via the fusion-evaporation reaction nickel-58(nickel-58,3n)barium-113 and observation through its alpha-decay chain from barium-113 to xenon-109 to tellurium-105 and tin-101. In the proof of principle experiment in March 2014, the alpha-decay chain of xenon-109 was observed with Double-sided Silicon Strip Detector (DSSD) and digital electronics at JAEA Recoil Mass Separator (RMS). The first discovery-oriented barium-113 experiment was carried out in December 2014 searching for its alpha-decay, ground-state to ground-state beta-decay and beta-delayed charged particle emission. An estimate was made on the upper limit of half-life of barium-113 as well as the production cross section.

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