Volume 46, Number 5, June I 1999
|Page(s)||617 - 623|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 September 2002|
Anomalous neutron Compton scattering in Nb hydride: Indications of proton correlations
Department of Physics, Uppsala University - P.O. Box 530, S-75121
2 I. N. Stranski-Institut für Physikalische und Theoretische Chemie Technische Universität Berlin - Str.d.17. Juni 112, D-10623 Berlin, Germany
3 Department of Physics, Royal Institute of Technology - S-10044 Stockholm, Sweden
4 Rutherford-Appleton Laboratory - Chilton, Didcot, OX11 0QX, UK
Accepted: 23 March 1999
Neutron Compton scattering probes properties of matter at time scales of the order of 10-16-. Very strong anomalies in the cross-sections for protons were observed for scattering on and . The effective proton cross-section was found to vary with the time of observation (first used as a parameter in the present experiments) being reduced by 30% at times around but reaching its conventional value for times larger than . No conventional explanation for this anomaly (which indicates some kind of very short-lived correlations) is known. A tentative explanation is that during such short time intervals, nearby protons are quantum correlated (even at ambient temperatures) in such a manner that their neutron cross-sections are modified.
PACS: 61.12.-q – Neutron diffraction and scattering / 03.65.-w – Quantum mechanics / 67.20.+k – Quantum effects on the structure and dynamics of nondegenerate fluids (e.g., normal phase liquid )
© EDP Sciences, 1999
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