APPEARANCE ENERGY AND ELECTRON-IMPACT IONIZATION CROSS-SECTION OF C-70

被引：11

作者：

BABA, MS ^{[1
]}

NARASIMHAN, TSL ^{[1
]}

BALASUBRAMANIAN, R ^{[1
]}

MATHEWS, CK ^{[1
]}

机构：

[1] INDIRA GHANDHI CTR ATOM RES,RADIOCHEM PROGRAMME,KALPAKKAM 603102,TAMIL NADU,INDIA

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1992年 / 116卷 / 01期

关键词：

APPEARANCE ENERGY; CROSS-SECTION; KNUDSEN CELL;

D O I：

10.1016/0168-1176(92)80023-T

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 electron impact ionisation cross-section of the C70 molecule as well as the appearance potential of the C70+ ion were determined by high temperature mass spectrometry. A molecular beam of C70 effusing from a Knudsen cell was ionised by a beam of 38 eV electrons. The appearance energy was determined by linear extrapolation of the ionisation efficiency curves. By comparing the integral of the ion intensity vs. time curve and the corresponding weight loss from the Knudsen cell for C70 and silver, it was possible to deduce the ionisation cross-section of C70 as (54.5 +/- 1.5) x 10(-16) cm2. This experimental value is discussed in comparison with those derived using various empirical formulae. The ionisation cross-section of C70 is very nearly the same as that for C60.

引用

页码：R1 / R6

页数：6

共 7 条

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[4] MATHEWS CK, IN PRESS J PHYS CHEM
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