LB Se-79 Soil Analysis

Below is a description of how the activity of the Se-79 in the May 2017 soil/Se was determined.

Activity of Se-79m

First, find the activity of the Se-79m state which has a half life of 3.92 [math] \pm [/math] 0.01 minutes. The line of interest here is 95.73 [math] \pm [/math] 0.03 keV

Histogram analysis

The most active sample was the 10% Se/soil mixture's pure selenium witness pellet, so let's analyze that first. The histogram for the sample from 615<t<1115 s is shown below.