PICOSECOND PROCESS OF NONLINEAR ABSORPTION IN HIGHLY EXCITED CdS SINGLE CRYSTAL

Il est trouvé que l'absorption nonlinéaire dans le monocristal de CdS dépend du temps par la mesure de transmission avec la technique de corrélation d'impulsion égale de PS. Nous résolvons la variation de l'absorption en fonction du temps en deux composantes : un processus "rapide" et celui "lent" qui sont attribués à l'interaction d'exciton-exciton et à celle d'exciton-électron respectivement.The nonlinear absorption in CdS single crystal is found to be time dependent by measurement of transmission with PS equal-pulse correlation technique. The variation of nonlinear absorption with time can be divided into two components : a 'fast' process and a 'slow' one, which are ascribed to exciton-exciton interaction and exciton-electron interaction, respectively

Damping signatures at JUNO, a medium-baseline reactor neutrino oscillation experiment

Abstract We study damping signatures at the Jiangmen Underground Neutrino Observatory (JUNO), a medium-baseline reactor neutrino oscillation experiment. These damping signatures are motivated by various new physics models, including quantum decoherence, nu(3) decay, neutrino absorption, and wave packet decoherence. The phenomenological effects of these models can be characterized by exponential damping factors at the probability level. We assess how well JUNO can constrain these damping parameters and how to disentangle these different damping signatures at JUNO. Compared to current experimental limits, JUNO can significantly improve the limits on tau(3)/m(3) in the nu(3) decay model, the width of the neutrino wave packet sigma(x), and the intrinsic relative dispersion of neutrino momentum sigma(rel)