SOME INTERNAL BACKGROUND PROCESSES IMPEDING THE OBSERVATION OF P-ODD EFFECTS IN THE ONE-PHOTON 2S-]1S TRANSITION OF MUONIC NEON

The weak interaction of neutral currents of the negative muon and nucl eons leads to the appearance of observable P-odd correlations in the o ne-photon 2s --> 1 s transition of light mu-atoms. Muonic neon was fou nd to be one of promising mu-atoms for observing these correlations. I t must be prepared under specific conditions so that its electron shel l contains no L-electrons during the 2s- orbit lifetime (approximately 0.1 ns). The presence of K-electrons is permissible. Here we have con sidered three processes impeding the observation of the one-photon 2s --> 1 s transition for such a situation. They are other decay channels of the same 2 s-state. The first is the cascade of the radiative 2s - -> 2pj (j = 1/2, 3/2) and 2pj --> 1s transitions of the muon. The seco nd is the radiation of one photon in the 2s --> 1s transition accompan ied by exciting the electron shell. The third is also the one photon r adiation but it is accompanied by ionizing the shell. The energies of photons radiated in these processes are close to the 2s --> 1 s transi tion energy. Moreover, they actually carry no information on the weak interaction. Thus, the given photons form the internal background in o bserving the one-photon transition. We have calculated the intensities of these photons, their circular polarization and angular correlation s between the momenta of one of them and a hard electron emitted in th e mu-decay at the 1 s-orbit. The results obtained show the P-odd effec ts in the angular distribution and circular polarization of the photon s of the 2s --> 1 s transition appear to be more preferable for measur ing than the ones in angular photon-electron correlations.