ABSOLUTE PARTIAL AND TOTAL ELECTRON-IMPACT IONIZATION CROSS-SECTIONS FOR C2H6 FROM THRESHOLD UP TO 950 EV

被引:32
作者
GRILL, V
WALDER, G
SCHEIER, P
KURDEL, M
MARK, TD
机构
[1] LEOPOLD FRANZENS UNIV, INST IONENPHYS, A-6020 INNSBRUCK, AUSTRIA
[2] COMENIUS UNIV BRATISLAVA, FAC MATH & PHYS, DEPT PLASMAPHYS, CS-84215 BRATISLAVA, CZECHOSLOVAKIA
关键词
ELECTRON IMPACT; DOUBLE FOCUSING MASS SPECTROMETER; IONIZATION CROSS SECTIONS; ION BEAM DEFLECTION;
D O I
10.1016/0168-1176(93)87026-O
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
Electron impact ionization of ethane (C2H6) was studied with a modified Nier type ion source and a double focussing mass spectrometer (reversed geometry). Using the ion-beam-deflection-technique and a SIMION based correction procedure it is possible to determine accurately parent and fragment ion currents produced. This allows the determination of relative partial ionization cross section functions from threshold up to 950 eV for the production of C2H6+, C2H5+, C2H4+, C2H3+, C2H2+, C2H+, C-2(+); CH3+, CH2+, CH+, C+; C2H52+ and C2H32+, respectively. Absolute partial ionization cross section functions for these ions were obtained by charge-weighted summing of all the observed partial ionization cross sections and by normalizing to the absolute total ionization cross section at 100 eV reported recently by Djuric et al. [N. Djuric, I. Cadet and M. Kurepa, Int. J. Mass Spectrom. Ion Processes 108 (1991) Pi]. Comparisons are made to earlier measurements.
引用
收藏
页码:31 / 42
页数:12
相关论文
共 29 条
[1]   PROBLEMS IN THE MEASUREMENT OF THE AR2+/AR+ PARTIAL IONIZATION CROSS-SECTION RATIO BY USE OF THE PULSED-ELECTRON-BEAM TIME-OF-FLIGHT METHOD [J].
BRUCE, MR ;
BONHAM, RA .
ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1992, 24 (02) :149-154
[2]   TOTAL AND PARTIAL ELECTRON COLLISIONAL IONIZATION CROSS-SECTIONS FOR CH4, C2H6, SIH4, AND SI2H6 [J].
CHATHAM, H ;
HILS, D ;
ROBERTSON, R ;
GALLAGHER, A .
JOURNAL OF CHEMICAL PHYSICS, 1984, 81 (04) :1770-1777
[3]  
DJURIC N, 1991, INT J MASS SPECTROM, V108, pR1
[4]  
FUCHS R, 1964, Z NATURFORSCH PT A, VA 19, P494
[5]   ABSOLUTE PARTIAL AND TOTAL ELECTRON-IMPACT IONIZATION CROSS-SECTIONS FOR C3H8 FROM THRESHOLD UP TO 950 EV [J].
GRILL, V ;
WALDER, G ;
MARGREITER, D ;
RAUTH, T ;
POLL, HU ;
SCHEIER, P ;
MARK, TD .
ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1993, 25 (03) :217-226
[6]   ELECTRON IMPACT IONIZATION CROSS-SECTION DATA FOR ATOMS ATOMIC IONS AND DIATOMIC MOLECULES .I. EXPERIMENTAL DATA [J].
KIEFFER, LJ ;
DUNN, GH .
REVIEWS OF MODERN PHYSICS, 1966, 38 (01) :1-&
[7]   DISSOCIATIVE IONIZATION OF H2, N2 AND CO BY ELECTRON-IMPACT - MEASUREMENT OF KINETIC-ENERGY, ANGULAR-DISTRIBUTIONS, AND APPEARANCE POTENTIALS [J].
KOLLMANN, K .
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 1975, 17 (03) :261-285
[8]   IONIZATION CROSS-SECTIONS OF RARE-GAS ATOMS BY ELECTRON-IMPACT [J].
KRISHNAKUMAR, E ;
SRIVASTAVA, SK .
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1988, 21 (06) :1055-1082
[9]   DETERMINATION OF ABSOLUTE PARTIAL AND TOTAL ELECTRON-IMPACT IONIZATION CROSS-SECTIONS FOR CF2CL2 FROM THRESHOLD UP TO 180 EV - AN IMPROVED EXPERIMENTAL-METHOD [J].
LEITER, K ;
SCHEIER, P ;
WALDER, G ;
MARK, TD .
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 1989, 87 (02) :209-224
[10]   A PULSED ELECTRON-BEAM TIME OF FLIGHT APPARATUS FOR MEASURING ABSOLUTE ELECTRON-IMPACT IONIZATION AND DISSOCIATIVE IONIZATION CROSS-SECTIONS [J].
MA, C ;
SPORLEDER, CR ;
BONHAM, RA .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1991, 62 (04) :909-923