A series of experiments followed, attempting to duplicate the results. Many of these used an alternate detector system using thin sheets of plastic, and these failed to turn up any evidence of the anomalons. It was suggested that this was due to the cross section of the reaction, whatever it was, being much higher in higher-mass nuclei, which was the case for the emulsion detectors but not the plastic. Others suggested they were actually seeing quark-gluon soups for the first time. A workshop on the issue was held at LBNL in 1984.