Date: Fri Oct 17 13:57:10 2008

Author: Krishna Chowdary

Subject: Re: faults in a crystal

Post:

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On Fri, Oct 17, 2008 at 8:51 AM, Bill McNairy wrote:

>
> I also like a similar demo that they sell (I think it's EI Yep, RAD-160 is
> the part number). It's a bottle of salt that has been irradiated. It's
> brown in color due to the faults in the crystal. When heated in a frying
> pan (no oil required!), the crystals will emit light as the faults are
> 'removed'.
>
>
RAD-160 is correct, it's called Irradiated Salt:
http://www.teachersource.com/Energy/EnergyConversion/IrradiatedSalt_100g.aspx

Bill, the description at the product page doesn't track for me with your
description. I don't understand "faults in the crystal" to be the same as
"electrons [promoted] to a higher energy state". Are these the same thing?
One seems to be about radiation induced dislocations in crystal structure
and the other seems to be about radiation induced transition to a metastable
electron energy level.

Still, it seems like a cool demo, and I plan to obtain some. Thanks for
pointing it out.

-Krishna

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On Fri, Oct 17, 2008 at 8:51 AM, Bill McNairy wrote:

I also like a similar demo that they sell (I think it's EI Yep, RAD-160 is the part number). It's a bottle of salt that has been irradiated. It's brown in color due to the faults in the crystal. When heated in a frying pan (no oil required!), the crystals will emit light as the faults are 'removed'.


RAD-160 is correct, it's called Irradiated Salt: http://www.teachersource.com/Energy/EnergyConversion/IrradiatedSalt_100g.aspx
Bill, the description at the product page doesn't track for me with your description. I don't understand "faults in the crystal" to be the same as "electrons [promoted] to a higher energy state". Are these the same thing? One seems to be about radiation induced dislocations in crystal structure and the other seems to be about radiation induced transition to a metastable electron energy level.
Still, it seems like a cool demo, and I plan to obtain some. Thanks for pointing it out.-Krishna

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