We report the results of Raman and synchrotron infrared absorption measurements of several molecular phases of solid nitrogen to pressures above 100 GPa (300 K). Low-temperature vibrational spectra to 45 GPa are also presented. The changes in Raman and infrared spectra at 60 GPa and 300 K are interpreted as arising from the epsilon-->zeta transition reported at low temperature. The character of splitting of the Raman vibron nu (2) observed at 25 GPa and low temperatures differs from that previously reported, a difference that we ascribe to different experimental procedures employed and metastability of the low-temperature phase. (C) 2001 American Institute of Physics.
|Number of pages||4|
|Journal||Low temperature physics|
|Publication status||Published - 2001|
- ORIENTATIONAL BEHAVIOR
- 2ND-ORDER TRANSITION