Halo Events In Super High Energy Nuclear Interactions

Gamma family events with visible energy higher than 10(15) eV usually form halos in the emulsion chambers, which brings up some problem for further investigating the characteristics of super high energy nuclear interactions. At present, only a few gross quantities are used for describing the halo events. On the other hand, there are some fine structures inside the halo, which can give more information.,We have measured all the showers one by one in the super high energy family events and compared the results with those obtained by the method of halo measurements. Analyses and discussions are made for some special events.