This report details a greatly improved measurement of the four-neutron evap
oration cross section following the fusion of He-6+Bi-209 for center-of-mas
s energies between 23.5 and 30.7 MeV. The results, for energies above the C
oulomb barrier, are interpreted within the context of the standard statisti
cal model. [S0556-2813(98)01312-0].