KNO Scaling in High Energy Proton-Nucleus Interactions

The distributions of n s and N g in proton-nucleus interactions were investigated in the regions of 4≥ N h ≥1 and N h ≥18 making use of the nuclear emulsion pellicles exposed to 205 and 405 GeV proton beams, respectively. / D (dispersion of n s ) of high N h is significantly large compared with that of low N h . It can be considered that / D increases as ν (the number of target nucleons encountered with incident proton). KNO distribution may scale to the center of mass energy at a definite value of ν.