Search for a nucleon-participant multiplicity effect on a possible anomalous fragment production

Momentum spectra of projectile fragments from 1.1 A GeV 20Ne interactions with a Fe target have been measured with associated charged-particle multiplicity of participant nucleons. We also measured fragment absorption by introducing a Fe absorber. We searched for enhance anomalous fragments production for fragments of charge 6 ≤ Z ≤ 10 as a function of multiplicity. To the possible exception of 18Ne, a negative result is reported. (orig.)