[ RadSafe ] Radioactivity from volcanic eruptions?

[Brad Keck]

Radsafers,

I would refer to you to some work from Drs. Salaymeh and Kuroda of the
University of Arkansas (then) that followed the eruption of Mt. St. Helens
and El Chicon volcanoes, and followed the content of rainwater over several
years.  Prof. Kuroda passed away some years ago, but as far as I know Dr.
Salaymeh is still working in the field; perhaps this radsafe post will find
him for an expert view.

For a good start, try the Journal of Radioanalytical and Nuclear Chemistry
116, 2, p 261-269 (1987).   

Happy hunting,

Bradly D. Keck, Phd, CHP



-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Joseph Alvarez
Sent: Friday, April 16, 2010 8:10 AM
To: Bjorn Cedervall
Cc: radsafe at health.phys.iit.edu
Subject: Re: [ RadSafe ] Radioactivity from volcanic eruptions?

Bjorn
I have looked for a good source, but have not found one. There are a few
articles for selected areas, but nothing generic. I have measured the
radioactive content of materials in several locations of the western US
(results unpublished). I found  basalt was typically less than 30 Bq/kg for
the uranium and thorium series radionuclides and rhyolite ranged from 500 to
1800 Bq/kg for the same radionuclides. A rhyolite source of volcanic dust
might raise the background, but only if you had a considerable deposit.
Joe

On Fri, Apr 16, 2010 at 10:27 AM, Bjorn Cedervall
<bcradsafers at hotmail.com>wrote:

>
> Any comments regarding amounts and whether they can effect the background
> levels in any sense?
>
>
>
> Perhaps some Radsafers good point at good sources of information for those
> of us who aren't too familiar with the topic?
>
>
>
> Bjorn Cedervall   bcradsafers at hotmail.com
>
>
>
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-- 
Joseph L. Alvarez, PhD, CHP
Alpha Beta Gamut
716 Schenley Rd.
Knoxville, TN 37923
Phone: 865-591-0175
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