Dave, our FA lab can help. They have an alpha probe that can be used -  Ludlum 43-93 Alpha/Beta w/ Ludlum 2360 scaler/ratemeter. Get hold of me and I can get you in touch.

v/r,
Wm. Dean May
Naval Surface Warfare Center, Crane Division, (NSWC Crane)
Harnessing the Power of Technology for the Warfighter
Code JXMP, Bldg. 3287E
300 Highway 361
Crane, IN  47522-5001
☎:  812.854.3073
DSN: 482-3073
Fax:  812.854.1174
Email: [log in to unmask]

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-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of David Hillman
Sent: Monday, February 17, 2020 10:51 AM
To: [log in to unmask]
Subject: [Non-DoD Source] Re: [TN] [External] RE: [TN] Solder Paste Test Question

Hi Peter - I am looking to measure the alpha emission of the solder paste as delivered by the supplier. With the industry change over to Pbfree soldering processes, there has been a renewed interest in alpha emission phenomena - everything from the die fabrication using Boron 10 to solder paste to the use of Xray inspection. My focus is finding anyone who has a test protocol for measuring the alpha emission of the solder paste as I had a customer ask the question and am now looking to see if I can provide a valid response. The answer may be that no one is testing solder paste for alpha emissions.

Dave

On Mon, Feb 17, 2020 at 9:01 AM Peter Bell <[log in to unmask]> wrote:

> Hi Dave,
>
> I'm very curious, I suppose you can't shed any light on the context? 
> We deal with a lot of electronics that will be or have been irradiated 
> during use, but not with any concern to radioactivity of 
> components/material
> *before* assembly.
>
> I guess you mean testing alpha emission of the paste as delivered by 
> the supplier? Not after irradiation by a later source?
>
> Kind regards,
> Peter Bell
> E-mail: [log in to unmask]
>
> CERN - European Organization for Nuclear Research
> 1211 Geneva 23, Switzerland
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of David Hillman
> Sent: Wednesday, 12 February 2020 14:38
> To: [log in to unmask]
> Subject: [TN] Solder Paste Test Question
>
> Hi folks - hey, does anyone know of a lab(s) that have the capability 
> to test solder paste for their low alpha emitting characteristics/properties?
>
> Dave Hillman
> Collins Aerospace
> [log in to unmask]
>