[ RadSafe ] Cohen's radon results and LNT

[Busby, Chris]

Sorry
C


-----Original Message-----
From: radsafe-bounces at agni.phys.iit.edu on behalf of Brennan, Mike  (DOH)
Sent: Mon 03/10/2011 18:32
To: The International Radiation Protection (Health Physics) MailingList
Subject: Re: [ RadSafe ] Cohen's radon results and LNT
 
I was actually addressing Chris Hofmeyr.

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Busby, Chris
Sent: Saturday, October 01, 2011 6:16 AM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] Cohen's radon results and LNT

Its some time since I looked at this but I recall that the problem was
that no one has looked at weapons fallout and rainfall.
C


-----Original Message-----
From: radsafe-bounces at agni.phys.iit.edu on behalf of Brennan, Mike
(DOH)
Sent: Fri 30/09/2011 18:43
To: The International Radiation Protection (Health Physics) MailingList
Subject: Re: [ RadSafe ] Cohen's radon results and LNT
 
Hi, Chris.  

I would be interested on your take on the Iowa Radon Lung Cancer Study,
which to me seems to have better power because it controlled for more
confounding factors.  http://radsci1.home.mchsi.com/irlcs.pdf


-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Chris Hofmeyr
Sent: Thursday, September 29, 2011 9:03 AM
To: Otto G. Raabe; Bernard L. Cohen
Cc: radsafe at agni.phys.iit.edu; WesVanPelt at verizon.net
Subject: Re: [ RadSafe ] Cohen's radon results and LNT

Prof Raabe,
Your most recent Radsafe posting is appreciated as implying that my
understanding of Cohen's radon data does not conflict with your
proposals concerning cancer induction by protracted exposures, as
explained in your well-considered 2011 paper.

I am thinking aloud about the alpha equal 2 beta effect. It is fairly
trivial to calculate that a whole-body short-term lethal dose of a
couple of Gray actually only affects one atom in a million. Of course, a
DNA strand contains millions of atoms, but a double strand break cannot
happen very far separated, or it would be classed as two single strand
breaks.  The alpha would tend to break both strands close together, but
how is that envisaged for two
(uncorrelated?) betas, as the beta-active nuclei are presumably
spatially well separated. Consecutive beta-decays are usually well
separated in time, but a beta is often almost instantaneously followed
by a gamma.
Some clarification would be appreciated.  

Sincerely
chris.hofmeyr at webmail.co.za


On Wed, 28 Sep 2011 12:00:14 -0700 "Otto G. Raabe" <ograabe at ucdavis.edu>
wrote

> At 09:40 AM 9/28/2011, Chris Hofmeyr wrote:
> >Prof Cohen, Radsafers,
> >In the condensed notes on Cohen's radon studies (attached to posting 
> >on Radsafe
> >21 Sept), I attempt to show unequivocally, although slightly
> unconventionally,
> >that Cohen's lung cancer (LC) mortality rates are basically
independent of
> the
> >average domestic radon concentrations as determined by Cohen on a per
county
> >basis. This independence clearly means that LNT is REJECTED, since
lung
> cancer
> >is not perceptibly correlated with domestic radon...
> *****************
> My Forum paper,  "Toward Improved Ionizing Radiation Safety 
> Standards", Health Phys. 101:84-93;2011, explains why LNT does not 
> apply to any protracted or repeated radiation exposures.
> 
> Otto
> 
> 
> **********************************************
> Prof. Otto G. Raabe, Ph.D., CHP
> Center for Health & the Environment
> University of California
> One Shields Avenue
> Davis, CA 95616
> E-Mail: ograabe at ucdavis.edu
> Phone: (530) 752-7754   FAX: (530) 758-6140
> ***********************************************
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