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AW: AW: Green glowing powder emitting gammas
Mary,
Thank you for this reminder of what I forgot to mention in my posting: I
would recommend the person involved to be extremely careful with this
material!!! Not to open its container, I hope there is one, even to put
the container into a tight closing jar and wait for further information
from experts. On the other hand of course no hysteria or fear is
appropriate!!!
BTW, the correct German (and also English) expression instead of
"bremstrulung" would be "Bremsstrahlung"......
Best regards,
Franz
Franz Schoenhofer
PhD, MR iR
Habicherg. 31/7
A-1160 Vienna
AUSTRIA
phone -43-0699-1168-1319
> -----Ursprüngliche Nachricht-----
> Von: Mary Becker [mailto:bremstrulung@hotmail.com]
> Gesendet: Dienstag, 01. Februar 2005 00:45
> An: franz.schoenhofer@chello.at; cooperc@teleport.com;
> radsafe@list.vanderbilt.edu
> Betreff: RE: AW: Green glowing powder emitting gammas
>
> A powdered Alpha source can be very dangerous. Is this person
knowledgable
> enough to have this material? I would hate to see him contaminate his
home
> or lab.
>
> >From: Franz Schönhofer <franz.schoenhofer@chello.at>
> >Reply-To: Franz Schönhofer <franz.schoenhofer@chello.at>
> >To: "'Chuck Cooper'" <cooperc@teleport.com>,
> <radsafe@list.vanderbilt.edu>
> >Subject: AW: Green glowing powder emitting gammas
> >Date: Mon, 31 Jan 2005 21:59:41 +0100
> >
> >Chuck,
> >
> >Some ideas...
> >
> >There is a lot of information missing: Is the powder glowing in the
dark
> >or only under UV excitation? If the first is true, then it might be
> >material for a luminous dial repair set. On the other hand I have a
> >"highly" radioactive alarm clock from the beginning of last century,
the
> >luminous dials of which do not emit any visible light any more. This
is
> >also true for a wrist watch I received as a boy in the late fifties.
It
> >is well known, that the phosphor used is degraded with time both from
> >environmental impacts and also the constant alpha-irradiation. If it
> >glows only during UV-irradiation it might be still material intended
for
> >luminous dials. Both my examples do so. On the other hand it might be
a
> >uranium compound. Some uranium minerals, like tobernite, autunite,
> >meta-autunite, urano-circit or meta-uranocircit show beautiful
> >fluorescence. I use to show it to friends visiting.
> >
> >What bothers me with the description is, that it should be "slightly
> >radioactive". The next question is: At what distance? My very simple
> >pocket dose rate meter shows in about 20 cm distance to the alarm
clock
> >mentioned above a dose-rate roughly ten times background radiation.
The
> >material for a repair kit would have to hold a manifold of the amount
on
> >my single alarm-clock.
> >
> >Maybe Bill Kolb would be the expert to help solving this question?
> >
> >Please keep me informed on the outcome. I have always been interested
in
> >the history of radioactivity and its application. I also have done
some
> >work on radioactivity in consumer products and investigated the
transfer
> >of tritium from luminous dials to the human body - with much
surprising
> >results.
> >
> >Best regards,
> >
> >Franz
> >
> >Franz Schoenhofer
> >PhD, MR iR
> >Habicherg. 31/7
> >A-1160 Vienna
> >AUSTRIA
> >phone -43-0699-1168-1319
> >
> >
> > > -----Ursprüngliche Nachricht-----
> > > Von: owner-radsafe@list.vanderbilt.edu [mailto:owner-
> > > radsafe@list.vanderbilt.edu] Im Auftrag von Chuck Cooper
> > > Gesendet: Montag, 31. Jänner 2005 09:01
> > > An: radsafe@list.vanderbilt.edu
> > > Betreff: Green glowing powder emitting gammas
> > >
> > > On another list discussing art materials, I ran across this
recent
> >post:
> > >
> > > > I have green glow powder that says it is
> > > > from the united states radium corp
> > > >
> > > > and it is radioactive - slightly
> > > >
> > > > my scintilating detector picks it up at a distance.
> > >
> > > I can only assume that he has some old radium paint base, should I
try
> > > to track this guy down?
> > >
> > >
> > >
> > >
> > >
>
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> >
> >
> >
>
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