Spin-dependent scattering lengths of slow neutrons with nuclei by pseudomagnetic measurements

A. Abragam , G.L. Bacchella , H. Glättli , P. Meriel , J. Piesvaux , M. Pinot

The spin-dependent scattering length of slow neutrons by the nuclei 23Na, 59Co, 63Cu, 65Cu, 195Pt, 197Au and 207Pb, as well as the mean value for the two isotopes of Tl and Ag in the natural element have been obtained by measuring the precession of the neutron spins as a function of nuclear polarization. A revised value for 91Zr is also given. The method has been extended for use with magnetic materials. Using f.c.c. and hexagonal cobalt, it is shown that these pseudomagnetic measurements may give precise information on the internal field seen by the nuclei.

Mots clés: nuclear magnetic moment; nuclear polarisation in solids; nuclear reactions and scattering due to neutrons; slow neutrons; pseudomagnetic measurements; sup 23 Na; sup 59 Co; sup 63 Cu; sup 65 Cu; sup 195 Pt; sup 197 Au; sup 207 Pb; Tl; Ag; nuclear polarisation; sup 91 Zr; magnetic materials; spin dependent scattering lengths; neutron spin precession

Domaines: Articles anciens

A. Abragam, G.L. Bacchella, H. Glättli, P. Meriel, J. Piesvaux, et al.. Spin-dependent scattering lengths of slow neutrons with nuclei by pseudomagnetic measurements. Journal de Physique Lettres, 1975, 36 (11), pp.263-265. ⟨10.1051/jphyslet:019750036011026300⟩. ⟨jpa-00231204⟩