This report is devoted to the studies of multiphonon excitations in nuclei, it contains in fact
two reports: an experimental one presenting a review of the observation of multiphonon …

We report experimental evidence of a global bifurcation on a highly turbulent von Kármán
flow. The mean flow presents multiple solutions: the canonical symmetric solution becomes …

We show that collective multiphonon states in atomic nuclei emerge at high excitation
energies when quantum fluctuations in the collective space are included beyond the …

The status of pionic single and double charge exchange reactions on nuclei is reviewed.
The present data base extending from very low pion energies up to 550 MeV reveals many …

We report the first observation of a double isovector giant dipole state in nuclei (ie, an
isovector giant dipole resonance built on another giant dipole). Two new resonances were …

Using a microscopic approach beyond RPA to treat anharmonicities, we mix two-phonon
states among themselves and with one-phonon states. We also introduce nonlinear terms in …

WxMo (1− x) S2 compounds with both molybdenum and tungsten present in every disulfide
layer, ie, as an intralayer solid solution, can be obtained. Several synthesis routes have …

We propose a method for solving exactly the nuclear eigenvalue problem within a
multiphonon space constructed out of Tamm-Dancoff phonons. The method consists in …

We have calculated the anharmonicities of the two-phonon spectrum of 40Ca by using a
boson expansion approach. The one-phonon states were constructed within the random …

We investigate the non-linear response of a quantum anharmonic oscillator as a model for
the excitation of giant resonances in heavy ion collisions. We show that the introduction of …