MeV, keV AND PHOTON INDUCED DESORPTION TIME OF FLIGHT MASS SPECTROMETRY S. DELLA-NEGRA, J. DEPAUW, H. JORET et Y. LE BEYEC J. Phys. Colloques, 50 C2 (1989) C2-63-C2-68 DOI: 10.1051/jphyscol:1989212