Studies of Properties of Fission Fragments by CyclicTime Optimization Method.
Abstract
The halflives of some of the radioactive fission fragments from the spontaneous fission of Californium252 have been determined from the study of the time variation of the K xray yields of these fragments. These halflives have been used for the mass identification of the decaying fragments. The method of cyclic time optimization was used in conjunction with a betaK xray coincidence technique to obtain the beta spectrum of decaying cerium isotopes. A Kurie plot of the beta spectrum revealed at least four beta groups. From the relative isotopic yields of K x rays the mass origin of each group has been determined. The end point energies and mass origin of these groups were as follows: 2.349 ((+OR) 0.100) MeV, ('145)Ce; 1.715 ((+OR ) 0.013) MeV, ('145)Ce and ('148)Ce; 1.267 ((+OR) 0.103) MeV, ('145)Ce; 0.748 ((+OR) 0.109) MeV, ('146)Ce.
 Publication:

Ph.D. Thesis
 Pub Date:
 1980
 Bibcode:
 1980PhDT........35E
 Keywords:

 Physics: Nuclear