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Abstract
Linewidths of the 209Bi nuclear magnetic resonance in liquid bismuth-lead alloys are reported as a function of concentration and temperature. The measured widths contain two components: a part proportional to temperature due to the usual magnetic hyperfine interaction with conduction electrons, and a part which decreases with increasing temperature. The latter is attributed to relaxation produced by an electric quadrupole interaction with diffusing ions. The quadrupolar term measured at 625 K passes through a marked maximum as a function of composition at 50% lead and it is the dominant contribution to the width around this composition at lower temperatures. It is concluded from a review of data for several liquid alloy systems containing nuclei with substantial quadrupole moments that this type of concentration dependence should be regarded as normal and not a peculiarity of the Bi-Pb system.
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