AW: [ RadSafe ] Radium
franz.schoenhofer at chello.at
Thu Nov 15 14:51:20 CST 2007
This explanation sounds reasonable - maybe the combination of all these
effects might produce the claimed fluorescence.
Franz Schoenhofer, PhD
Von: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] Im Auftrag
von Gary Masters
Gesendet: Mittwoch, 14. November 2007 19:14
An: radsafe at radlab.nl
Betreff: Re: [ RadSafe ] Radium
I am at the ANS winter meeting this week. In the Data,
Analysis, and Operations for Nuclear Criticality Safety -
II track yesterday a convincing paper was presented by Doug
Minnema that addresses, I believe, the stories that we've all
heard about those involved in criticality accidents seeing a
focused or reflected blue light as well as the question posed
in this message thread.
The explanation is that the local ionization is so great
that Oxygen and Nitrogen in the air fluoresce along their
characteristic spectral lines. The spectra that is within the
visual range that we do not see seems to be as a result of self
re-absorption. The re-absorption is a function of pressure and
he was able to provide a convincing argument that at ground
level this would result in the color blue.
He drew upon the work done by those in the astronomy field in
explaining auroral affects due to upper atmosphere interactions
with cosmic radiation.
In addition he believes that a sufficiently active alpha
source, such as a large amount of Radium, would produce the
In addition, he argued that a significant amount of UV and
IR radiation would be produced in a criticality event due to
this mechanism and stated that this could explain what has
sometimes been perceived as greater than expected surface
tissue damage to the extremities, and the reported sensation
of a heat/shock wave.
The paper should be in the proceeding of the 2007 ANS Winter
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