Pressure broadening of NH3 by H2 from 15 to 40 K

被引：9

作者：

Willey, DR ^{[1
]}

Timlin, RE ^{[1
]}

Deramo, M ^{[1
]}

Pondillo, PL ^{[1
]}

Wesolek, DM ^{[1
]}

Wig, RW ^{[1
]}

机构：

[1] Allegheny Coll, Dept Phys, Meadville, PA 16335 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2000年 / 113卷 / 02期

关键词：

D O I：

10.1063/1.481836

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pressure broadening of the (J,K) = (1,1), (2,2), and (3,3) inversion transitions of NH3 was measured using normal- H-2 as the broadening agent at kinetic temperatures of 15 to 40 K. Measurements were taken in a quasiequilibrium cell using the collisional cooling technique. H-2 pressure broadening cross sections were compared to low-temperature He pressure broadening of the same transitions and found to be from 2.5 to 8 times larger than corresponding He cross sections. Measured normal- H-2 and He cross sections were also compared to calculated J = 0, para-H-2 cross sections. (C) 2000 American Institute of Physics. [S0021-9606(00)02126-7].

引用

页码：611 / 615

页数：5

共 44 条

[41] LABORATORY OBSERVATION OF MASER ACTION IN NH3 THROUGH COLLISIONAL COOLING [J].

WILLEY, DR ;

SOUTHWICK, RJ ;

RAMADAS, K ;

RAPELA, BK ;

NEFF, WA .

PHYSICAL REVIEW LETTERS, 1995, 74 (26) :5216-5219

[42] VERY LOW-TEMPERATURE HELIUM PRESSURE BROADENING OF DCL IN A COLLISIONALLY COOLED CELL [J].

WILLEY, DR ;

CHOONG, VE ;

DELUCIA, FC .

JOURNAL OF CHEMICAL PHYSICS, 1992, 96 (02) :898-902

[43] COLLISIONAL COOLING OF THE NO-HE SYSTEM - THE PRESSURE BROADENING CROSS-SECTIONS BETWEEN 4.3 AND 1.8 K [J].

WILLEY, DR ;

BITTNER, DN ;

DELUCIA, FC .

MOLECULAR PHYSICS, 1989, 67 (02) :455-463

[44] Helium pressure broadening of ammonia inversion transitions from 10 to 35 K [J].

Willey, DR ;

Timlin, RE ;

DeNardo, PG ;

Null, PL ;

Pondillo, PL ;

Tyszka, T .

JOURNAL OF CHEMICAL PHYSICS, 1997, 107 (20) :8252-8261

← 1 2 3 4 5 →