INVESTIGATION OF THE FAR ASYMMETRIC REGION IN CF-252(SF)

A twin Frisch-gridded ionization chamber has been used to measure the fission fragment mass, kinetic-energy and angular correlations for Cf- 252(sf). In total 2.5 x 10(8) events were collected. The focus was in the far asymmetric mass region, where enhancements in the yield had be en found earlier. It could be shown, that these findings are due to fa lse events, coming from either close geometries not properly taking in to account the annular-dependent energy loss in the sample and backing , from a too large angular cone selected in case of studies employing ionization chambers,or even from poor target qualities. (C) 1997 Elsev ier Science B.V.