2019-10-04 - Report to Darkside Materials Meeting

Proposed guidelines for comparison samples

- Comparison samples shall be measured as blindly as possible, including by the maker of the sample. 
For the SNOLAB samples, the activities will be kept by a group member not driectly in low-background 
counting.

- The sample activity and other details will be sent to a member of the darkside materials group who 
will collect the answers for the collaboration from all the counting labs.

- Once a lab has produced counting results, they will be given the sample information. If a lab wishes 
to use measure the sample on several instruments, the lab is asked to submit results after the count on 
the first instrument is analyzed.

- "Las Vegas rule" These results are private to Darkside, and to the extent possible the Materials group. 
They are never published by darkside.

- Should a lab wish to show this verification in talks or in a publication, they may do so with an 
acknowledgement that the samples were prepared by lab X for the Darkside Materials group.