2019 Impact factor 2.176
Hadrons and Nuclei
Eur. Phys. J. A 7, 189-195

Study of the Mo-Ba partition in 252Cf spontaneous fission

D.C. Biswas1,2 - R.K. Choudhury2 - M. Cinausero3 - B. Fornal4 - D.V. Shetty2 - G. Viesti1 - D. Fabris1 - E. Fioretto3 - M. Lunardon1 - G. Nebbia1 - G. Prete3 - D. Bazzacco1 - M. DePoli3 - D.R. Napoli3 - C.A. Ur1 - G. Vedovato3

1 Dipartimento di Fisica dell'Universitá and I.N.F.N., Sezione di Padova, 35131 Padova, Italy
2 Bhabha Atomic Research Centre, Mumbai, India
3 I.N.F.N. Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
4 Institute of Nuclear Physics, Krakow, Poland

Received: 21 July 1999 / Revised version: 19 November 1999 Communicated by D. Schwalm

Abstract
Measurements of fission fragment yields and neutron multiplicities have been carried out for the Mo-Ba fragment pairs in the spontaneous fission of 252Cf, using the $\gamma$-ray spectroscopy technique to analyze $\gamma$-$\gamma$-$\gamma$ coincidence data. Prompt $\gamma$-ray multiplicities were also measured as a function of the number of neutrons emitted in the fission process leading to the Mo-Ba partition. We do not observe the enhancement in the yields of events with high neutron emission multiplicity ($\nu$n$\geq$7) that has been associated to a second fission mode leading to the production of hyperdeformed Ba fragments, as reported in some earlier studies. The average $\gamma$-ray multiplicity is found to be rather weakly dependent on the number of neutrons emitted in the fission process.

PACS
27.70.+q $150 \leq A \leq 189$ - 21.10.Re Collective levels - 25.70.Gh Compound nucleus


Copyright Società Italiana di Fisica, Springer-Verlag 2000