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RE: FW: Tissue Equivalent Proportional Counters
An organic scintillation detector with pulse-shape discrimination can
determine n and gamma rates independently. Is there a commercial system
based on this approach?
F. P. Doty, Ph. D.
Member of Technical Staff
Sandia National Labs
7011 East Avenue
Livermore, CA
-----Original Message-----
From: William V Lipton [mailto:liptonw@DTEENERGY.COM]
Sent: Wednesday, April 30, 2003 8:54 AM
To: MCCONNELL, MICHAEL E
Cc: 'radsafe@list.vanderbilt.edu'
Subject: Re: FW: Tissue Equivalent Proportional Counters
Tissue equivalent proportional counters are sensitive to any ionizing
radiation that can reach the active region of the detector. Thus, you will
have trouble performing neutron surveys in a mixed gamma - neutron radiation
field.
I remember, from my accelerator hp days, that the Zero Gradient Synchrotron,
at Argonne National Laboratory used them. This facility had a stable
gamma/neutron ratio and the hp's had performed detailed studies to determine
the effective quality factor. Thus, they could determine the mrems/hour for
both neutrons and gamma with one survey instrument. If you can't establish
an
effective Q, however, tissue equivalent counters are probably not useful.
The opinions expressed are strictly mine.
It's not about dose, it's about trust.
Curies forever.
Bill Lipton
liptonw@dteeenergy.com
"MCCONNELL, MICHAEL E" wrote:
> > -----Original Message-----
> > From: MCCONNELL, MICHAEL E
> > Sent: Monday, April 28, 2003 3:36 PM
> > To: 'radsafe@list.vanderbilt.edu'
> > Subject: FW: Tissue Equivalent Proportional Counters
> >
> >
> >
> > -----Original Message-----
> > From: MCCONNELL, MICHAEL E
> > Sent: Monday, April 28, 2003 3:31 PM
> > To: 'radsafe@list.vanderbilt.edu'
> > Subject: Tissue Equivalent Proportional Counters
> >
> >
> > Question: What are the pros and cons of using a "Tissue Equivalent
> > Proportional Counter" (i.e. the REM-500 by FarWest Technologies) for
> > measuring neutron expsoure rate, versus the Boron Tri-flouride (BF3)
> > detector used with the PNR-4? I'm trying to clarify the difference for a
> > class I'm presenting on the PNR-4. All responses will be appreciated.
> > Thank you.
> >
> >
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