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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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