Abstract
The Theory of angular momentum waves in pure ortho-hydrogen is presented in the Bloch spin wave approximation. Since there is a large energy gap between the ground state and the excitation this approximation can be justified. Quadrupole-quadrupole interaction of nearest neighbours is used. We have derived some dispersion curves and the spectrum.
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Mertens, F.G., Biem, W. & Hahn, H. Theory of angular momentum waves in solid ortho-hydrogen. Z. Physik 213, 33–45 (1968). https://doi.org/10.1007/BF01380025
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DOI: https://doi.org/10.1007/BF01380025