Discussion: Session 2

R. W. DURHAM Atomic Energy of Canada Limited

Why is there such a discrepancy in mass analy

sis for 235-U/238-U ?

W.N. FOX

The solid source mass spectrometer results for the 235-U/238-U ratio have been found to be 1 to 1.5% in excess of those measured on a Copen hurst UF^ spectrometer. These results seem to be independent of enrichment. I believe that Mr. Griggs has had a similar experience in his studies on WAGR.

C.F. GRIGGS

This was indeed the case although no attempt had been made to correct the solid source meas urements for mass discrimination effects.

A.J. FUDGE