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Volumn 126, Issue 15, 2007, Pages

Isotope quantum effects in the electron momentum density of water

Author keywords

[No Author keywords available]

Indexed keywords

COMPUTATIONAL METHODS; ELECTRON MOBILITY; GROUND STATE; ISOTOPES; SYNCHROTRON RADIATION; WATER;

EID: 34247388487     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.2723093     Document Type: Article
Times cited : (26)

References (70)
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    • edited by M. J. Cooper, P. E. Mijnarends, N. Shiotani, N. Sakai, and A. Bansil Oxford University Press, Oxford
    • X-Ray Compton Scattering, edited by M. J. Cooper, P. E. Mijnarends, N. Shiotani, N. Sakai, and A. Bansil (Oxford University Press, Oxford, 2004).
    • (2004) X-Ray Compton Scattering
  • 21
    • 1442263636 scopus 로고    scopus 로고
    • K. Nygård, S. Huotari, K. Hämäläinen, S. Manninen, T. Buslaps, N. Hari Babu, M. Kambara, and D. A. Cardwell, Phys. Rev. B 69, 020501 (R) (2004).
    • K. Nygård, S. Huotari, K. Hämäläinen, S. Manninen, T. Buslaps, N. Hari Babu, M. Kambara, and D. A. Cardwell, Phys. Rev. B 69, 020501 (R) (2004).
  • 36
    • 34247352461 scopus 로고    scopus 로고
    • The H-bond length and angle distributions of Ref. 27 are numerically inter-extrapolated to the temperatures of the present study.
    • The H-bond length and angle distributions of Ref. 27 are numerically inter-extrapolated to the temperatures of the present study.
  • 37
    • 34247361234 scopus 로고    scopus 로고
    • peak = 1.89 Å of the NMR-based H-bond length distribution.
    • peak = 1.89 Å of the NMR-based H-bond length distribution.
  • 38
    • 34247349987 scopus 로고    scopus 로고
    • K. Hermann, L. G. M. Pettersson, M. E. Casida et al, STOBE-DEMON, version 1.0, StoBe Software, 2002
    • K. Hermann, L. G. M. Pettersson, M. E. Casida et al., STOBE-DEMON, version 1.0, StoBe Software, 2002.
  • 43
    • 34247360000 scopus 로고    scopus 로고
    • The calculations have been performed with the code CPMD Version 3.3, written by Jürg Hutter et al, Max-Planck-Institut für Festkörperforschung, Stuttgart, IBM Research Laboratory, Zürich, 1995
    • The calculations have been performed with the code CPMD Version 3.3, written by Jürg Hutter et al., Max-Planck-Institut für Festkörperforschung, Stuttgart, IBM Research Laboratory, Zürich, 1995.
  • 50
  • 61
    • 34247335459 scopus 로고    scopus 로고
    • The multiple scattering correction has a negligible effect on the experimental CP differences compared to the present statistical inaccuracy
    • The multiple scattering correction has a negligible effect on the experimental CP differences compared to the present statistical inaccuracy.
  • 65
    • 34247381150 scopus 로고    scopus 로고
    • Compared to our previously reported CP differences for H2O (Ref. 24, the present data exhibit some quantitative discrepancies at elevated temperatures (i.e, at 50 and 90 °C, These are partly due to the improved momentum resolution of the present study (Δq=0.45 a.u, compared to that of Ref. 24 (Δq=0.64 a.u, Based on careful studies, the most probable explanation for the remaining discrepancies is the improved sample confinement of the present study (i.e, using glass capillaries) as compared to the sample cell with Kapton windows used in Ref. 24, the latter suffering from water diffusion at elevated temperatures. In principle this should only affect the intensity, but secondary effects hamper proper background subtraction. Moreover, the data consistency of the present study is significantly improved due to the top-up mode used at SPring-8, which minimizes nonstatistical fluctuations. We further note that if there are any temperature-independent contribut
    • 2O (Ref. 24), the present data exhibit some quantitative discrepancies at elevated temperatures (i.e., at 50 and 90 °C). These are partly due to the improved momentum resolution of the present study (Δq=0.45 a.u.) compared to that of Ref. 24 (Δq=0.64 a.u.). Based on careful studies, the most probable explanation for the remaining discrepancies is the improved sample confinement of the present study (i.e., using glass capillaries) as compared to the sample cell with Kapton windows used in Ref. 24, the latter suffering from water diffusion at elevated temperatures. In principle this should only affect the intensity, but secondary effects hamper proper background subtraction. Moreover, the data consistency of the present study is significantly improved due to the top-up mode used at SPring-8, which minimizes nonstatistical fluctuations. We further note that if there are any temperature-independent contributions present in the data which are not properly subtracted (e.g., multiple scattering or scattering from the cell) the observed amplitude will be lower. Importantly, the results of neither Ref. 24 nor the present study are affected by these quantitative discrepancies at elevated temperatures. In particular, the necessity of excluding the short and largely bent H bonds from the NMR-based model has been verified.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.