[ RadSafe ] What fertilizer - specifically????

Mon Nov 5 14:16:00 CST 2012

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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