Dissociative photoionization of SiF4 around the Si 2p edge:: a new TOFMS study with improved mass resolution

被引:24
作者
Santos, ACF [1 ]
Lucas, CA [1 ]
de Souza, GGB [1 ]
机构
[1] Univ Fed Rio de Janeiro, Inst Quim, BR-21949900 Rio De Janeiro, Brazil
关键词
PEPICO; TOFMS; photoionization; SiF4;
D O I
10.1016/S0368-2048(00)00311-X
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
Mass spectra, with improved mass resolution, have been obtained for the SiF4 molecule, using time-of-flight mass spectrometry and synchrotron radiation, below and above the Si 2p ionization edge (L-III, 111.7 eV). New branching ratios for the ionic dissociation have been determined and compared to previous results. The excellent signal-to-noise ratio has also allowed for the first observation of a rearrangement fragment (F-2(+)) in photoionization studies of the SiF4 molecule. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:115 / 121
页数:7
相关论文
共 14 条
[1]  
DESOUZA GGB, IN PRESS
[2]  
DESOUZA GGB, 2000, IN PRESS QUIMICA NOV
[3]  
DESOUZA GGB, 1989, J CHEM PHYS, V90, P12
[4]   OVERLAPPING CORE TO VALENCE AND CORE TO RYDBERG TRANSITIONS AND RESONANCES IN THE XUV SPECTRA OF SIF4 [J].
FRIEDRICH, H ;
PITTEL, B ;
RABE, P ;
SCHWARZ, WHE ;
SONNTAG, B .
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1980, 13 (01) :25-30
[5]   ABSOLUTE OSCILLATOR-STRENGTHS FOR THE PHOTOABSORPTION, PHOTOIONIZATION AND IONIC PHOTOFRAGMENTATION OF SILICON TETRAFLUORIDE .1. THE VALENCE SHELL [J].
GUO, XZ ;
COOPER, G ;
CHAN, WF ;
BURTON, GR ;
BRION, CE .
CHEMICAL PHYSICS, 1992, 161 (03) :453-470
[6]  
GUO XZ, 1992, CHEM PHYS, V161, P471
[7]   Photofragmentation of third-row hydrides following photoexcitation at deep-core levels [J].
Hansen, DL ;
Arrasate, ME ;
Cotter, J ;
Fisher, GR ;
Hemmers, O ;
Leung, KT ;
Levin, JC ;
Martin, R ;
Neill, P ;
Perera, RCC ;
Sellin, IA ;
Simon, M ;
Uehara, Y ;
Vanderford, B ;
Whitfield, SB ;
Lindle, DW .
PHYSICAL REVIEW A, 1998, 58 (05) :3757-3765
[8]   DISSOCIATIVE SINGLE, DOUBLE, AND TRIPLE PHOTOIONIZATION OF SILICON TETRAFLUORIDE IN THE VALENCE SHELL AND SILICON 2P REGIONS (H-NU=33-133 EV) [J].
IMAMURA, T ;
BRION, CE ;
KOYANO, I ;
IBUKI, T ;
MASUOKA, T .
JOURNAL OF CHEMICAL PHYSICS, 1991, 94 (07) :4936-4948
[9]   RELAXATION PROCESSES FOLLOWING EXCITATION AND IONIZATION OF SIF4 IN THE VICINITY OF THE SILICON 2P THRESHOLD .2. DISSOCIATION OF THE MOLECULAR-IONS [J].
LABLANQUIE, P ;
SOUZA, ACA ;
DESOUZA, GGB ;
MORIN, P ;
NENNER, I .
JOURNAL OF CHEMICAL PHYSICS, 1989, 90 (12) :7078-7086
[10]  
MARINHO RRT, 1999, THESIS U KBRASILIA