Radon Emanation Result of : SNOLAB 100, SCIGRIP 4 Acrylic Cement.

Date: 2018/10/22


The SCIGRIP 4 Acrylic Cement sample was received for radon emanation counting with the low background Radon board system on surface at SNOLAB. The request for the emanation counting was received on October 15, 2018.

1. Sample Handling

New gloves were used to handle the sample. Sample was wiped with UPW. No further cleaning was needed and the sample was deemed ready for counting. It was then placed in the emanation chamber.

2. Summary of Emanation Counting Results

The sample run for the above-mentioned sample was started on October 30, 2018 at 10:30am. For precision measurements, two counting runs are necessary per sample: a Blank (BLK) run with no sample in the chamber and a Sample (SPL) run itself, in which the entire set-up is counted again, but with the sample under study inside the chamber. The net emanation rate (atoms/d) of the sample is obtained by subtracting the BLK rate from the SPL rate. Typically one would perform the Blank runs each time prior to the the sample run. But the frequency of Blanks is often reduced due to consistent Blank rates of our system. The last Blank run of the surface Radon emanation system was performed on DATE.

In this report, only the 222Rn emanation rate is presented. It is left to the experiment to determine how to interpret and scale these results based on their radiopurity target.

Sample Run Type Counting Time (d) 222Rn (atoms/d)
SCIGRIP 4 Acrylic Cement Sample 20.6 91.1 +/- 4.3
Blank 18.9 87.5 +/- 4.1
Net Counts 3.6 +/- 5.9
Upper Limit 9.5




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