NN WAVE-FUNCTION AT SMALL DISTANCES AND HARD BREMSSTRAHLUNG IN THE PROCESS PP-]PP-GAMMA

Various possibilities of studying the NN wave function at small distan ces-and in particular, quark degrees of freedom in the NN system-are d iscussed. It is shown that there is such a possibility at moderate ene rgies-namely, hard bremsstrahlung in the process pp --> pp gamma at pr oton-beam energies in the range 350-450 MeV permits distinguishing bet ween the pp wave function with nodes in S and P waves that corresponds to the Moscow potential of NN interaction from functions obtained wit h repulsive-core mesonic potentials. In the regions where photon energ ies in the c.m.s. are maximal (forward and backward photon emission an gles in the laboratory frame), the pp --> pp gamma cross section calcu lated with the Moscow potential has maxima at which it is approximatel y five times larger than the analogous cross section calculated with r epulsive-core mesonic potentials. The coordinate-representation formal ism of the theory of bremsstrahlung is expounded.