The application of time delay method for analysis of processeswhich initiate electrical breakdown in 1.3 mbar nitrogen

The contributions of ions and neutral active states to secondary electron emission in the afterglow has been analyzed of the time delay method. The dependencies of mean value of time delay on relaxation time, overvoltage, and glow current have been discussed. The analysis of validity of Laue distribution for time delay has been performed, becoming the criterion for estimation of the main cause of breakdown. Thus, afterglow can be divided in three regions: one each for the role of charged and neutral species in initiation of subsequent breakdown, and third, as the transitional one     

Transition probabilities in 134Pr: a test for chirality in nuclear systems

Exited states in 134Pr were populated in the fusion-evaporation reaction 119Sn(19F,4n)134Pr. Recoil distance Doppler-shift and Doppler-shift attenuation measurements using the Euroball spectrometer, in conjunction with the inner Bismuth Germanate ball and the Cologne plunger, were performed at beam energies of 87 MeV and 83 MeV, respectively. Reduced transition probabilities in 134Pr are compared to the predictions of the two quasiparticle + triaxial rotor and interacting boson fermion-fermion models. The experimental results do not support the presence of static chirality in 134Pr underlying the importance of shape fluctuations. Only within a dynamical context the presence of intrinsic chirality in 134Pr can be supported.