NONEQUILIBRIUM ROTATIONAL ENERGY-DISTRIBUTION IN NH3 SUPERSONIC MOLECULAR-BEAM

被引：1

作者：

TANAKA, Y ^{[1
]}

TACHIKAWA, M ^{[1
]}

MATSUSHIMA, F ^{[1
]}

UEMATSU, Y ^{[1
]}

SHIMIZU, T ^{[1
]}

机构：

[1] UNIV TOKYO,FAC SCI,DEPT PHYS,BUNKYO KU,TOKYO 113,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1992年 / 31卷 / 04期

关键词：

SUPERSONIC BEAM; ROTATIONAL RELAXATION; ADIABATIC EXPANSION; NONEQUILIBRIUM ENERGY DISTRIBUTION; STARK SPECTROSCOPY;

D O I：

10.1143/JJAP.31.1199

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The energy distribution among rotational levels of NH3 molecules in a supersonic beam is measured at a position distant from the nozzle by the highly sensitive infrared laser Stark spectroscopic method. A nonequilibrium energy distribution is observed within the rotational degree of freedom. In particular, population inversion is observed on some rotational levels. Computer simulation based on a novel rate-equation model, in which the dipole-dipole interaction, detailed balance, and hard-sphere collisions are assumed, reproduces the observed results well. This model is able to characterize the internal energy distribution of a supersonic beam under various experimental conditions by means of a scaling parameter.

引用

页码：1199 / 1205

页数：7

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