Vibrational dynamics of isotopically dilute nitrogen to 104 GPa

被引：41

作者：

Olijnyk, H ^{[1
]}

Jephcoat, AP ^{[1
]}

机构：

[1] Univ Oxford, Dept Earth Sci, Oxford OX1 3PR, England

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.83.332

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Raman studies to 104 GPa of a N-14(2) host with dilute N-15(2) and (NN)-N-14-N-15 isotopic species indicate an increase in vibrational coupling with pressure. The lowest frequency branch of the isotopic species N-15(2) reaches a plateau around 100 GPa suggesting the onset of bond weakening for molecules located on particular sites. An unusual intensity increase is observed for the isotopic nu(1) guest modes. The phase transitions above 20 GPa appear to involve an increase in the number of inequivalent sites, with possibly subtle changes in the orientational behavior of particular molecules in the pressure range 25 to 50 GPa not readily revealed in recent x-ray diffraction studies.

引用

页码：332 / 335

页数：4

共 23 条

[1] CALCULATED THERMODYNAMIC PROPERTIES AND PHASE-TRANSITIONS OF SOLID N2 AT TEMPERATURES 0-LESS-THAN-OR-EQUAL-TO-T-LESS-THAN-OR-EQUAL-TO-300K AND PRESSURES 0-LESS-THAN-OR-EQUAL-TO-P-LESS-THAN-OR-EQUAL-TO-100GPA [J].