Re: LSC Standards

[daleboyce@charter.net]

Hi all,



It seems to me that I bought Cl36 and Am241 LSC standards from Packard

several years ago. They sold them for calibrating their alpha/beta

discrimination on their LSCs.  Once upon a time I made some alpha

"standards" for myself from standard solutions. I don't recommend that route

though, as the scintillation fluid very slowly evaporated. The sources ended

up being pretty useless over the period of about a year.



Dale

daleboyce@charter.net



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

From: <alstonchris@netscape.net>

To: <rujohnso@nmsu.edu>; <radsafe@list.vanderbilt.edu>

Sent: Tuesday, October 05, 2004 4:41 PM

Subject: RE: LSC Standards





> Russ

>

> Isotope Products Laboratories (isotopeproducts.com).  Note that anything

other than C-14 or H-3 is likely to be a custom order.  I'm very curious to

know whether anyone routinely manufactures, say, Cl-36, or Sr-90 standards

>

> Cheers

> cja

>

>

> Russ Johnson <rujohnso@nmsu.edu> wrote:

> >Hello;

> >Our office will be procuring a liquid scintillation counter in the very

> >near future. I am looking for a source to buy some liquid standards.

> >Most companies I've seen when browsing the web only advertise H-3 and

> >C-14 standards for their units. But, we also will need counting

> >capability for several other isotopes, both beta and alpha emitters.

> >Does anyone have a US-based commercial source for standards other than

> >H-3 and C-14? I'm new at scintillation counting, so any advice is

> >appreciated. Please reply to my email address. Thanks.

> >-Russ Johnson, Rad Safety Specialist

> > EH&S office

> > New Mexico State University

>

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