COINCIDENT AUGER / THRESHOLD-PHOTOELECTRON SPECTROSCOPY APPLIED TO THE STUDY OF Kr(3d-1) AUGER TRANSITIONS Y. Hikosaka,1 R. I. Hall,2 F. Penent,2 P. Lablanquie,3 and K. Ito 1 1 Photon Factory, Tsukuba, Japan 2 DIAM, Universite Paris 6, 75005 Paris, France 3 LURE, Centre Universitaire Paris-Sud, BP 34, 91898 Orsay, France We have studied the Kr(3d-1) Auger spectra using threshold photoelectron / Auger electron coincidences spectroscopy. This technique present many advantages: it has a high efficiency, it allows filtering of Auger lines with respect to the initial inner-shell vacancy, it eliminates the broadening of Auger and photo-electron lines due to PCI and will allow sub-natural linewidth Auger spectroscopy with high resolution VUV monochromators and Auger electron spectrometers. Such technique appears very promising in desentangling complicated Auger spectra and assigning weak transitions.