# The 58th Winter Nuclear & Particle Physics Conference 2021

9-12 February 2021
Virtual Meeting
America/Toronto timezone

## A Measurement of Zinc-65 Using Data from the KDK Experiment

11 Feb 2021, 16:30
15m
Virtual Meeting

#### Virtual Meeting

Nuclear and Particle Astrophysics

### Speaker

Lilianna Hariasz (Queen's University)

### Description

Zinc-65 (Zn-65) is a radionuclide of interest in the fields of medicine and gamma-ray spectroscopy, within which its continued use as a tracer and common calibration source necessitates increasingly-precise nuclear decay data. A Zn-65 dataset was obtained as part of the KDK ("potassium decay") experiment, whose apparatus consists of an inner X-ray detector and an efficient outer detector, the Modular Total Absorption Spectrometer (MTAS), to tag gamma rays. This setup allows for the discrimination of the electron capture decays of Zn-65 to the ground (EC) and excited (EC) states of Copper-65 (Cu-65) using an emerging technique for such a measurement, exploiting the high efficiency ($\sim$98%) of MTAS. Techniques used to obtain the ratio of EC to EC decays are applicable to the main KDK analysis, which is making the first such measurement for Potassium-40, a common background in rare-event searches such as those for dark matter. We present our current methodology and analysis procedures developed to obtain a novel measurement of the electron-capture decays of Zinc-65.

email address lilianna.hariasz@gmail.com Experiment

### Primary author

Lilianna Hariasz (Queen's University)

### Co-authors

N.T. Brewer (Oak Ridge National Laboratory, Physics Division, Oak Ridge, Tennessee, USA) H. Davis (Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee, USA) Philippe Di Stefano (Queen's) E.D. Lukosi (Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee, USA) B.C. Rasco (Oak Ridge National Laboratory Physics Division, Oak Ridge, Tennessee, USA) K.P. Rykaczewski (Oak Ridge National Laboratory Physics Division, Oak Ridge, Tennessee, USA) Matthew Stukel (Queen's University)

### Presentation Materials

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