[ RadSafe ] Cold Fusion

[McMahan, Kimberly L.]

We had a similar situation a couple of years ago. One of our operational
groups purchased a Bonner sphere set and made some measurements in an
"unknown" field, just for information and familiarization with the
equipment and codes. Data were gathered and unfolding codes were run.
Not long after our group made some measurements in a different field
using these Bonner spheres as well as a Snoopy and a TEPC. Lo and behold
the Bonner spheres were reporting much higher than the others. Finally
we took the Bonner spheres into the cal lab's low scatter room and
delivered some known doses (sheesh, we're slow). Evaluated doses were
still very high. On investigation and consultation with the supplier it
was found that the crystal size was 4 x 8 mm rather than 4 x 4 mm as
stated in the technical documents. They were as surprised as we were
(!).

Manufacturers, please take note. Where was the QA at the factory? 

Buyer, beware.

Kim McMAHAN    ORNL External Dosimetry

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
Behalf Of JPreisig at aol.com
Sent: Thursday, May 18, 2006 6:38 PM
To: radsafe at radlab.nl
Subject: [ RadSafe ] Cold Fusion

Hmmmmm,

       This is from:    jpreisig at aol.com    .

        Hi Radsafers,

              Recent RADSAFE messages indicate that some cold fusion
        researchers are mixing up their Lithium Iodide and BF3
detectors.
        Oh my --- why can't researchers get something so fundamental
         correct???  The detector responses of these types of detectors
        are different, right???  Perhaps some verbal abuse (or worse) is
in
        order.  What was more important than getting the experiment's
        detectors correct???  I would recommend re-analyzing the data
        with only one type of detector present (drop out the other
detector's
        data).  See what happens.  Then rerun the whole experiment with
        only one type of detector used.  Of course, send erratum
messages
        to any journal's involved with these articles.