[ RadSafe ] [Non-DoD Source] Fwd: Po-210 particle mobility (UNCLASSIFIED)

Thu Apr 14 13:59:50 CDT 2016

Classification: UNCLASSIFIED
Caveats: NONE

Greetings all,

"Aggregate recoil" was one of the commonly used technical terms for this
phenomenon.  Here's a review of the phenomenon, Transport of Radioactive
Material by Alpha Recoil, A.S. Icenhour, May 2005:
http://web.ornl.gov/~webworks/cppr/y2005/rpt/122446.pdf.

Abstract
The movement of high-specific-activity radioactive particles (i.e., alpha
recoil) has been
observed and studied since the early 1900s. These studies have been
motivated by concerns about
containment of radioactivity and the protection of human health.
Additionally, studies have
investigated the potential advantage of alpha recoil to effect separations
of various isotopes. This
report provides a review of the observations and results of a number of the
studies.

Enjoy,
Jerry
________________________________

Gerald A. Falo, Ph.D., CHP
Army Public Health Center (Provisional) - Health Physics Program
gerald.a.falo.civ at mail.mil
gerald.a.falo.civ at mail.smil.mil
410-436-4852
DSN: 584-4852

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Chris Alston
Sent: Thursday, April 14, 2016 2:38 PM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: [Non-DoD Source] [ RadSafe ] Fwd: Po-210 particle mobility

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----

Folks

In general, you'll see creepier behavior with higher E and/or shorter t1/2.
Let me think on't for a good reference.

Cheers
ca
---------- Forwarded message ----------
From: KARAM, PHILIP <PHILIP.KARAM at nypd.org>
Date: Thu, Apr 14, 2016 at 2:02 PM
Subject: Re: [ RadSafe ] Po-210 particle mobility
To: "The International Radiation Protection (Health Physics) Mailing List"
<radsafe at health.phys.iit.edu> There is an interesting line in a paper by
Stannard and Casarett from a 1964 paper:
"Finally, the tendency of polonium-210 to "creep" from containers holding
solutions or to become detached from the best-plated and protected
substrates has contributed to many instances of unexpected area
contamination."
There is no citation accompanying this statement - it seems to have been
considered common knowledge at that time. The paper is:
Stannard JN and Casarett GW. Concluding Comments on Biological Effects of
Alpha-Particle Emitters in Soft Tissue as Exemplified by Experiments with
Polonium 210. Radiation Research Supplement 5,
398-434 (1964).
Andy
-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[Caution-mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Rees,
Brian G
Sent: Thursday, April 14, 2016 1:47 PM
To: RADSAFE
Subject: [ RadSafe ] Po-210 particle mobility Does anyone have any
references for the mobility of Po-210 particles?
I've read Otto Raabe's excellent work on Pu-238 mobility, and when I was
looking into Pu-238 mobility many experienced "old guys" (who now might not
seem so old...) told me that Po-201 was even more mobile, but I never saw
anything in literature.
Thanks,
Brian Rees
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Classification: UNCLASSIFIED
Caveats: NONE