On the Origin of Primary Cosmic Radiation

At first it is illustrated that two important empirical (acts concerning primary cosmic radiation, i.e., 0) the similarity of energy spectra expressed with respect to kinetic energy per nucleon of various nuclei independent of their charge numbers and (ii) fairly abundant existences of heavier nuclei, will not be able to be explained by any acceleration mechanisms. And it is shown that (j) and (ii) can be understood only if one assumes a new type of element formation, according to which, from the nucleon gas of extremely high temperature (""" 10'~o A-) and pressure, vauous atomic nuclei are created with energy spectra N(t)=C exp{-(l+t)/kT} (E: kinetic energy per nucleon) and with ratio Cp : Ca.: Coxo: Cz > ]0= 10: 1 : 1/20: 1/60. Physical inevitability with which this assumption is introduced and its physical significance are discussed. The theory itself of element formation of such a type, however, is not touched but only it is pointed out that the introduction of such an assumption is strongly required from present knowledges concerning primary cosmic ray particles.