Archived posting to the Leica Users Group, 1999/08/04

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Subject: [Leica] Re: radioactive lenses
From: Bert <mr.bass@planet.nl>
Date: Wed, 04 Aug 1999 16:53:01 +0200
 
I don't have the article. I'd be interested though.
Do you know which Thorium isotope we're talking about? Most Thorium
isotopes emit alpha-radiation and gamma radiation. Since alpha-radiation is
very difficult to detect with a Geiger counter, measuring both front and
rear end doesn't make much sense since gamma radiation isn't hindered much
by glass or metal (except lead).

Bert K.
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Unlike in sex, bigger isn't always better