Comparative neutron scattering study of molecular ordering in d-camphor and dl-borneole
Hołderna-Natkaniec K.1, Natkaniec I.2,3, Habrylo S.1, Mayer J.2
- 1Institute of Physics A.Mickiewicz University, ul. Grunwaldzka 6, 60-780 Poznan, Poland
- 2H. Niewodniczanski Institute of Nuclear Physics, ul. Radzikowskiego 152, Krakow, Poland
- 3Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation
Physica B: Physics of Condensed Matter, 194-196, pp.369-370, 1994
DOI:: 10.1016/0921-4526(94)90514-2
Abstract:
Molecules of both studied substances: d-camphor and dl-borneole are nearly globular in shape and show plastic behaviour at room temperature. Neutron scattering investigations have been performed down to a helium temperature under different hydrostatic pressures up to 400 MPa. Neutron diffraction (ND) and incoherent inelastic neutron scattering (IINS) spectra clearly show the existence of phase transition in d-camphor, which has not been observed in dl-borneole. The ND spectra point to a possible cubic structure of dl-borneole crystal down to helium temperatures; temperature dependence of the IINS spectra suggests continuous transition from dynamical to static disorder of molecules in this crystal. © 1994.
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