Hyperfine field of 237Np in NpO2
作者： B.D. Dunlap , G.M. Kalvius , D.J. Lam , M.B. Brodsky
DOI: 10.1016/0022-3697(68)90188-1
关键词: Mössbauer effect 、 Condensed matter physics 、 Hyperfine structure 、 Nuclear magnetic resonance 、 Atom 、 Chemistry 、 Neutron diffraction 、 Magnetic moment 、 Ferromagnetism 、 Magnetic susceptibility 、 Antiferromagnetism
摘要: Abstract Nuclear hyperfine spectra, obtained by means of the Mossbauer effect 59.6 keV transition in 237 Np, have been investigated NpO 2 between 4.2° and 30°K. At low temperatures a broadening resonance line is observed which interpreted to be small, unresolved magnetic splitting. From size field, moment on Np atom estimated order 0.01 μ B . These results confirm presence antiferromagnetic ordering accordance with previous susceptibility heat capacity data, addition show that ordered state unusually low, as has indicated neutron diffraction measurements.
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