RE: today's best value for W in air

["Lieskovsky, Miro" <MLieskovsky@nbpower.com>]

In addition to Brian's post:

The value given in Technical Report Series No.277, Absorbed Dose
determination in Photon and Electron Beams, An International Code of
Practice, IAEA, Vienna, 1987, page 9, is:
W/e = 33.97 +- 0.06 J/C, where W/e is the mean energy expended in air per
ion pair formed and per electron charge 

Miroslav Lieskovský 

mlieskovsky@nbpower.com <mailto:mlieskovsky@nbpower.com> , 
(506) 659 7421


 

-----Original Message-----
From: Brian_Gaulke@hc-sc.gc.ca [mailto:Brian_Gaulke@hc-sc.gc.ca]
Sent: October 7, 1999 5:54 PM
To: Multiple recipients of list
Subject: Re: today's best value for W in air




The Canadian National Research Council's Institute for National Measurement
Standards uses 33.97 J/C.

Brian R. Gaulke, CHP
brian_gaulke@hc-sc.gc.ca





Chris Alston <alstonc@odrge.odr.georgetown.edu> on 99/10/07 12:58:36

Please respond to radsafe@romulus.ehs.uiuc.edu

To:   Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
cc:    (bcc: Brian Gaulke)

Subject:  today's best value for W in air




>It's Ignorant Question Time! All you therapy physicists know this:
>
>What's today's best-accepted value for W (the mean energy expended in air
>per ion pair formed)?
>
>It's changed several times during my career, and being a diagnostic type,
>I'm not as up-to-date as I should be.
>
>If you don't want to clog the MEDPHYS ether, you can email me directly.
>
>Thanks.
>
>Doug

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