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All
I don't kow why anybody would have any resentment!
The relationship is simple, but Roengtens and Rem are not directly comparable.
The Roentgen is compared to the Rad, that is;
A Roentgen is the ionization in air = 1.610 x 10^12
ion pairs per gram at STP and a Rad is the energy
deposited in tissue = 6.242 x 10^7 MeV per gram.
A Rem =Q (or W(sub-r)) x Rad. That is, the Roentgen is a measure of the ionization of
air, the Rad is a measure of the energy deposited in tissue and the Rem is
a measure of the risk caused by the energy deposited in tissue.
----- Original Message -----
Sent: Tuesday, September 25, 2001 10:48
AM
Subject: Re: Roentgen is a Rem?
I hope I'm not going to cause
any resentment, but here's where you can get a simple explanation of the
relationship between Roentgen and Rem:
http://www.hps.org/publicinformation/radfactsheets/index.html
The original question didn't seem to me to
be from a fledgling health physics consultant.
|
| William V Lipton <liptonw@DTEENERGY.COM>
Sent by: owner-radsafe@list.vanderbilt.edu
09/25/01 07:06 AM
Please respond to William V Lipton
|
To:
"William P. N. Smith" <wpns@compusmiths.com>
cc:
"radsafe@list.vanderbilt.edu"
<radsafe@list.vanderbilt.edu>
Subject:
Re: Roentgen is a Rem? |
At the risk of seeming rude, I resent those who
think that the health physics
profession can be reduced to a few FAQ's.
This individual obviously does not
have a clue, and we are doing him
and ourselves a disservice by playing along
with this.
If there are
radiological health aspects to whatever he is consulting in, then
he should
hire a qualified health physicist.
The opinions expressed are strictly
mine.
It's not about dose, it's about trust.
Bill
Lipton
liptonw@dteenergy.com
"William P. N. Smith"
wrote:
> Am I correct in assuming that a Roentgen is essentially
equivelent to a
> Rem? I understand that r is measured in air (and
instruments) and Rems use
> some Q factor dependent on the type
(energy?) of the radiation, but inthe
> real world is Q usually
unity?
>
> Thanks!
>
> --
> William Smith
wpns@compusmiths.com N1JBJ@amsat.org
> ComputerSmiths
Consulting, Inc. www.compusmiths.com
>
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