Re: beta's in my coffee creamer

[daleboyce@charter.net]

Hi Henk,



Sounds to me that you are seeing chemoluminesence from interaction of the

creamer with the scint fluid. A lot of chemicals will do this.  One that is

especially amusing is "Count Off" or other cleaners designed to remove

radiatioactive contamination.



Dale





----- Original Message ----- 

From: "H. Westenbrink" <h.westenbrink@AMC.UVA.NL>

To: <radsafe@list.Vanderbilt.Edu>

Sent: Friday, July 09, 2004 4:03 AM

Subject: beta's in my coffee creamer





>

> To my surprise I found beta's in coffee creamer, when I

> counted a mixture of creamer and scintillation fluid (ultima gold)

> in a LSC at 0 - 156 keV. There was a significant difference with

> the blanc.

> When I mix creamer with demi-water I see in the LSC at 0-19 keV

> a significant difference with the blanc (cherenkov?). Only at day one

>

> Can anybody tell which isotope I see?

>

> Henk Westenbrink

> h.westenbrink@amc.nl

> Central B-laboratory

> AMC  Amsterdam

>

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