[ RadSafe ] What fertilizer - specifically????

[Ted de Castro]

I've detected H3 before with a GM - a 10 Ci gas chromatograph foil - 
Nickel foil I think.  That was nearly 40 years ago so I may not have ALL 
the details exact.

On 11/5/2012 12:16 PM, Dixon, John E. (CDC/ONDIEH/NCEH) wrote:
> Tritium (H-3) does emit an 18.3 kev beta. If you have sufficient quantity of H-3 and the beta is shielded by a material of adequate density (plastic or even glass), then the bremsstrahlung X-rays (from 2 to 5 kev) can be detected by a thin crystal NaI probe. I am not certain about the name or manufacturer of this probe, but if you look up Dr. Raymond Johnson in the Health Physics Society registry, he has such a device. He used it during some training he was given I Gaithersburg, Md. Years ago. He claimed you could detect tritium with a hand held device and I bet him 5 dollars you could not.
>
> I lost the bet.....
>
> Regards,
> John Dixon, CHP
>
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of franz.schoenhofer at chello.at
> Sent: Monday, November 05, 2012 12:14 PM
> To: The International Radiation Protection (Health Physics) MailingList
> Cc: Mercado, Donald Paul. (ARC-QH)[CONSOLIDATED SAFETY SERVICES INC]
> Subject: Re: [ RadSafe ] What fertilizer - specifically????
>
> Don et al.,
>
> I do not believe that tritium dials are a good object for demonstration of radioactivity - I hope you know that the weak beta particles are shielded by glass or whatsoever and cannot be detected by an external measurement device, whether it would be a "microR" -meter or a "microSv"-meter. BTW: I have experience with tritium from wrist watches and its incorporation into the human body.
>
> Best regards,
>
> Franz
>
>
> ---- "Mercado schrieb:
>> I know you've probably thought of these, but I'll be redundant,
>>
>> Radium & H3 dials, exit signs, welding rods, Cloisonné jewelry, a thyroid cancer patient (really exciting if you have a microR meter with a speaker), refractory bricks, water scale, a banana.....
>>
>> Someone came in here last week with a H3 glow stick from Canada that was MUCH brighter than any exit sign tube I've ever seen, said it was meant for camping.
>>
>>
>> -----Original Message-----
>> From: radsafe-bounces at health.phys.iit.edu
>> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Ted de
>> Castro
>> Sent: Monday, November 05, 2012 8:18 AM
>> To: The International Radiation Protection (Health Physics) Mailing
>> List
>> Subject: [ RadSafe ] What fertilizer - specifically????
>>
>> I need to give a general radiation talk and want to include samples of
>> radiation around us ....
>>
>> I have my Fiestaware, lamp mantel, sand from the beach in Kerala
>> India, smoke detector sources, DU, NoSalt and thought maybe a small
>> bag of fertilizer would go well.
>>
>> Any specific suggestions to make my quest quicker - and yeah yeah I
>> know
>> - not in a crowded store with lots of customers and volume full up.
>>
>> Thanks for your help.
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> --
> Franz Schoenhofer, PhD, MinRat
> Habicherg. 31/7
> A-1160 Vienna
> Austria
> mobile: ++43 699 1706 1227
>
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