Abstract
A new approach has been made to use Solid State Nuclear Track Detectors in ‘2Π-geometry’ for studying (a) the fission cross-section, and (b) the angular anisotropy of the fission fragments emitted in the 14.8 MeV neutron induced fission of Pu-240 and Pu-241. The results of ‘2Π-geometry’ arrangements have been compared with those obtained by using the conventional vacuum chamber measurements. The results indicate that with proper adjustments, the ‘2Π-geometry’ method can cut down the accelerator time by at least a few orders of magnitude that required by the conventional vacuum chamber arrangements. This facilitates the studies of reactions with low yields. The paper also describes the measurements carried out to determine the spontaneous fission decay constants of the above mentioned isotopes of plutonium. Some preliminary values of other fission parameters have also been quoted.