ISOMER SHIFT CALIBRATION OF 57Fe BY LIFE-TIME VARIATIONS IN THE ELECTRON-CAPTURE DECAY OF 52Fe. J. Ladrière, A. Meykens, R. Coussement, M. Cogneau, M. Boge, P. Auric, R. Bouchez, A. Benabed et J. Godard J. Phys. Colloques, 40 C2 (1979) C2-20-C2-22 DOI: 10.1051/jphyscol:1979205