THE ATTACHMENT PROBABILITY FOR A LAMBDA-PARTICLE TO FRAGMENTS

The attachment probability P of a Lambda particle to the fragments res ulting from the fission of a heavy hypernucleus, produced by antiproto n annihilation in a uranium target, is estimated on the basis of a sim plified statistical model. A smooth level density generated from the h armonic oscillator spectrum by means of a Gaussian averaging function is employed while for the harmonic oscillator level spacing (h) over b ar omega(Lambda) various analytic expressions in terms of the mass num ber are used. The calculated values of P-H, the attachment probability to the heavy fragment, depend on the expression of (h) over bar omega (Lambda) used. Comparison of these P-H values with the experimental re sults is made and discussed.