EFFECT OF TEMPERATURE ON THE FORMATION AND AUTODESTRUCTION OF PARENT ANIONS

被引：25

作者：

CHRISTOPHOROU, LG

DATSKOS, PG

机构：

[1] UNIV TENNESSEE, DEPT PHYS & ASTRON, KNOXVILLE, TN 37996 USA

[2] OAK RIDGE NATL LAB, DIV HLTH SCI RES, ATOM MOLEC & HIGH VOLTAGE PHYS GRP, OAK RIDGE, TN 37831 USA

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 1995年 / 149卷

关键词：

AUTODESTRUCTION; PARENT ANION FORMATION; TEMPERATURE EFFECT;

D O I：

10.1016/0168-1176(95)04229-E

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The effect of temperature on the formation and autodestruction processes of parent anions has been studied for the molecules SF(6), c-C(4)F(6) and C(6)F(6) in a buffer gas of N(2). These processes were studied in the temperature, T, range 300-600 K and over the mean electron energy range [epsilon] = 0.2-1.0 eV. The formation of parent anions seems to depend very little on changes in T below 600 K for all three molecules. However, increases in T from ambient to 600 K enhance dramatically the autodetachment frequency for c-C(4)F(6)(-) and C(4)F(6)(-). This heat-activated autodetachment is related to increases in the internal energy content of the anion and is found to have activation energies of 0.237 and 0.477 eV for c-C(4)F(6)(-) and C(6)F(6)(-), respectively. Under the same experimental conditions the stabilized SF(6)(-) anion does not undergo heat-activated autodetachment.

引用

页码：59 / 77

页数：19