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Tunneling of hydrogen in Nb(CH)0.0002 |
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| Authors: | K Neumaier D Steinbinder H Wipf H Blank G Kearley |
| Institution: | (1) Walther Meissner Institut für Tieftemperaturforschung, D-8046 Garching, Federal Republic of Germany;(2) Institut für Festkörperphysik, Technische Hochschule Darmstadt, Hochschulstrasse 2, D-6100 Darmstadt, Federal Republic of Germany;(3) Institut Laue-Langevin, Avenue des Martyrs, F-38042 Grenoble, France |
| Abstract: | From neutron spectroscopic measurements, we determine a value of (162±4)  eV for the tunneling matrix element of trapped H in Nb(CH)0.0002. The matrix element is about 30% smaller than that of (226±4) eV for H trapped by O. The results demonstrate a significant influence of the trapping impurity on the lattice potential of the tunneling H interstitials. |
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