[ RadSafe ] Counting Efficiencies for Helgeson (Neutron Products) Whole Body Counter

[James Barnes]

Hi, Howard;

Yes, I was saddened to read that he has passed on.  I never met Lew, but I spent 
a lot of time with his body counters.  Folks always said he was a great guy and 
I would have liked to have met him.

Thanks for the info.

Jim

 



________________________________
From: Howard <howard.long at comcast.net>
To: The International Radiation Protection (Health Physics) MailingList 
<radsafe at health.phys.iit.edu>
Sent: Mon, May 23, 2011 8:09:37 PM
Subject: Re: [ RadSafe ] Counting Efficiencies for Helgeson (Neutron Products) 
Whole Body Counter

Jim,
Lew Helgeson, who passed away recently, was a personal friend and patient.
His lead well was stored where I now live, and his assistant, Eagan, lived here.

As I recall, negligible radiation ( except neutrons) got through the lead 
bricks,
suggesting  near 100% "efficiency" for how much of detected radiation 
came from the person in the well.

Howard Long

On May 23, 2011, at 5:55 PM, James Barnes <james.g.barnes at att.net> wrote:

> Folks;
>  
> I need the approximate efficiencies for the Helgeson (now Neutron Products) 
> whole body counter (the "trough" version where the person laid down inside of 
> the lead lined well and the counter trolly rolled above him / her)).  
> Particularly I need it for I-131, Cs-134, Cs-137.  I looked in our old Helgeson 
>
> reports, but efficiencies weren't really listed.
>  
> Any help (even educated guesstimates) would be useful.
>  
> Thanks,
>  
> Jim Barnes
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