Abstract
Inelastic neutron scattering experiments to determine phonon density of states of coherent scattering samples of polycrystalline complex solids are generally intensity-limited and therefore are feasible only at high flux facilities. Phonon density of states of the monoclinic phase of tetracyanoethylene at 300 K, obtained using the medium resolution triple axis spectrometer at the new Indian medium flux reactor Dhruva are reported here. The raw data is converted to the “neutron weighted” phonon density of states by applying suitable corrections. Comparison made with results from a theoretical calculation based on a semirigid molecule model of lattice dynamics is fair. Results from Dhruva are also consistent with that obtained (to be published) at the high flux pulsed neutron source (ISIS) of the Rutherford Appleton Laboratory in United Kingdom.
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References
Carpenter J M and Price D L 1985Phys. Rev. Lett. 54 441
Chaplot S L 1986Neutron inelastic scattering, in the summer course on use of reactor neutron beams in study of materials, course conducted under the Regional Cooperative Agreement of IAEA at Bhabha Atomic Research Centre, Bombay (unpublished)
Chaplot S L 1987Phys. Rev. B36 8471
Chaplot S L, Chakravarthy R and Tompkinson J 1987 Annual Report of ISIS, RAL, UK page A66
Chaplot S L and Mukhopadhyay R 1986Phys. Rev. B33 5099
Chaplot S L, Mukhopadhyay R, Vijayaraghavan P R, Deshpande A S and Rao K R 1988aProc. Solid State Phys. Symp. (India)C31 153
Chaplot S L, Rao K R, Chakravarthy R and Tompkinson J 1988b Annual Report of ISIS, RAL, UK page A133
Dorner B 1972Acta Crystallogr. A28 319
Maley N, Lannin J S and Price D L 1986Phys. Rev. Lett. 56 1720
Mukhopadhyay R, Chaplot S L and Rao K R 1985Phys. Status. Solidi. A92 467
Roy A P and Brockhouse B N 1970Can. J. Phys. 48 1781
Sahu P C, Barathan R, Yousuf M, Govinda Rajan K, Mukhopadhyay R, Chaplot S L and Rao K R 1987Proc. Solid State Phys. Symp. (India)C30 36
Sjolander A 1958Arkiv Fysik 14 315
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Chaplot, S.L., Mukhopadhyay, R., Vijayaraghavan, P.R. et al. Phonon density of states of tetracyanoethylene from coherent inelastic neutron scattering at Dhruva reactor. Pramana - J Phys 33, 595–602 (1989). https://doi.org/10.1007/BF02845810
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DOI: https://doi.org/10.1007/BF02845810