Temperature dependence of the Raman bandwidths for the lattice and internal modes in ammonium halides close to the lambda-phase transitions


YURTSEVEN H. H. , Tuzer T. U.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, cilt.70, ss.445-448, 2008 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 70 Konu: 2
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/.j.saa.2007.11.030
  • Dergi Adı: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
  • Sayfa Sayısı: ss.445-448

Özet

We study here the temperature dependence of our Raman bandwidths for the upsilon(5) lattice modes of NH4Cl (T-lambda = 241 K) and NH4Br (T-lambda = 235 K) and for the upsilon(2) internal mode of NH4Cl close to the lambda-phase transitions.