Evidence of Quantum Correlation Effects of Protons and Deuterons in the Raman Spectra of Liquid <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">H</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>O-<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">D</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>O

C. A. Chatzidimitriou-Dreismann; U. K. Krieger; A. Möller; M. Stern

doi:10.1103/PhysRevLett.75.3008

Evidence of Quantum Correlation Effects of Protons and Deuterons in the Raman Spectra of Liquid $H_{2}$ O- $D_{2}$ O

C. A. Chatzidimitriou-Dreismann, U. K. Krieger, A. Möller, and M. Stern

Phys. Rev. Lett. 75, 3008 – Published 16 October 1995

Abstract

Measurements of the intrinsic Raman scattering activity of the stretching vibrational regime of $H_{2}$ O, $D_{2}$ O, and their mixtures at room temperature reveal an “anomalous” behavior. The data are analyzed in connection with neutron scattering results and analytical and numerical quantum mechanical studies, which showed the constancy of the microstructure of water with respect to H/D substitution. The Raman scattering results are unequivocally in conflict with at least one of the assumptions: (i) validity of the Born-Oppenheimer approximation, (ii) classical character of H and D nuclei.