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Spontaneous fission of²⁵²Cf; prompt gamma ray emission; multiplicity distribution

The shape parameters of the multiplicity distribution of prompt gamma rays emitted in spontaneous fission of²⁵²Cf were obtained using the multiple coincidence technique. The multiplicity distribution is well represented by a Gaussian distribution. Assuming the average number of prompt gamma rays emitted per fission to be 10.3, the standard deviation of the multiplicity distribution was estimated to be 4.2±0.4. The variation of the standard deviation of the multiplicity distribution has also been obtained as a function of kinetic energy of one of the fragments and was found to exhibit a strong zigzag dependence on the single fragment kinetic energy. The results have been discussed on the basis of the emission mechanism of prompt gamma rays in fission.

V S Ramamurthy¹ R K Choudhury¹ J O Mohankrishna¹

1. Bhabha Atomic Research Centre, Bombay - 400085

Published

April 1977

Manuscript received

2 September 1976

Manuscript revised

15 January 1977