Spin-dependent scattering lengths of slow neutrons with nuclei by pseudomagnetic measurements A. Abragam, G.L. Bacchella, H. Glättli, P. Meriel, J. Piesvaux et M. Pinot J. Physique Lett., 36 11 (1975) 263-265 DOI: 10.1051/jphyslet:019750036011026300