[ RadSafe ] Counting Efficiencies for Helgeson (Neutron Products) Whole Body Counter
james.g.barnes at att.net
Mon May 23 23:31:37 CDT 2011
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.
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
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
suggesting near 100% "efficiency" for how much of detected radiation
came from the person in the well.
On May 23, 2011, at 5:55 PM, James Barnes <james.g.barnes at att.net> wrote:
> 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.
> Jim Barnes
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