FIDLER use for Pu-239

["NMDAUGH0" <NMDAUGH0_at_WC-DENVER2@ccmail.wcc.com>]

     Hi, Everybody,
     I'm looking for information concerning use of the FIDLER (Field 
     Instrument for the Detection of Low Energy Radiation) for detection of 
     Pu-239 soil contamination.  In particular, I'm interested in field 
     survey or calibration data that has attempted to correlate FIDLER 
     field survey readings with soil Pu-239 activity concentrations 
     determined from sampling and radiochemical analysis.  I recognize the 
     problems involved with such a correlation (particularly regarding 
     photon attenuation with depth of contamination), but would like to 
     review whatever information there might be on attempts.  Associated 
     with this would be questions of minimum detectable concentrations for 
     the FIDLER, stability of instrument response (I've not had direct 
     field experience with one, but have heard tales of false positive 
     readings - perhaps because old electronics packages were used), and 
     any other idiosyncracies associated with FIDLER use.  Has anyone tried 
     correlating FIDLER response against any other field survey instrument 
     for Pu-239?  Any information would be appreciated.
     
     nancy m. daugherty 
     nmdaugh0@wcc.com