UD802 and dose from AmBe

["Frikkie Beeslaar" <beeslar@sabs.co.za>]

Dear radsafers



We have some radiation workers that work with gauges that contain

either just an AmBe source or AmBe/Cs sources.   They can thus be

exposed to either the gammas from the Cs or to the gamma/neutrons from

the AmBe.  



I have noticed some readings that did not coincide with the typical

UD802 fingerprint readings for an AmBe source.   As expected, element 1

and 2 (LiBo) registered high readings, but Element 3 and 4 (CaSO) was

almost zero.  From this it looks like just neutrons that were measured

since there was no reading from E3 and E4 (which is insensitive to

neutrons).  

How can it be possible to only see the neutron and not the gamma from

the Am?

Could it be the design of the gauge that filters out all the gammas?



Thanks for the help







Frik Beeslaar

Medical Physicist

Radiation Protection Service (SABS)

e-mail: BEESLAR@SABS.CO.ZA



Tel:   027-12-428 6882

Fax::  027-12-428 6685

Cell:   082 829 9613



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