VIBRATIONAL-EXCITATION OF ETHANE BY ELECTRON-IMPACT

被引：27
作者：
BOESTEN, L
TANAKA, H
KUBO, M
SATO, H
KIMURA, M
DILLON, MA
SPENCE, D
机构：
[1] SOPHIA UNIV,DEPT GEN SCI,CHIYODA KU,TOKYO 102,JAPAN
[2] OCHANOMIZU UNIV,BUNKYO KU,TOKYO 112,JAPAN
[3] ARGONNE NATL LAB,ARGONNE,IL 60439
[4] RICE UNIV,DEPT PHYS,HOUSTON,TX 77251
[5] MATSUSHITA CO,OSAKA,JAPAN
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1990年 / 23卷 / 11期
关键词：
D O I：
10.1088/0953-4075/23/11/023
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Differential cross sections for electron impact vibrational excitation of ethane (C2H6) have been determined for incident energies from 3 to 20 eV over a scattering angular range of 20' to 130'. In addition, vibrational excitation functions were determined for impact energies of 2 to 15 eV at scattering angles of 30', 60', 90' and 120'. These measurements confirm the broad shape resonance at 7.5 eV but provide no evidence for a (second) resonance near 2.3 eV. A decomposition of the vibrational energy-loss spectrum shows strong resonance enhancement of selected vibrational modes, which may be explained by decay of a temporary negative ion (TNI) of symmetry species e u. A continuum multiple scattering calculation (CMS) reproduces these experimental results fairly well and indicates the simultaneous involvement of a TNI of species a2u.
引用
收藏
页码：1905 / 1913
页数：9
相关论文
共 26 条
[1]  
Altmann SL, 1957, P CAMB PHILOS SOC, V53, P343
[2]   ANGULAR DISTRIBUTIONS FOR EXCITATION OF VIBRONIC STATES BY RESONANT ELECTRON MOLECULE REACTIONS [J].
ANDRICK, D ;
READ, FH .
JOURNAL OF PHYSICS PART B ATOMIC AND MOLECULAR PHYSICS, 1971, 4 (03) :389-&
[3]   DECOMPOSITION OF NORMAL-COORDINATE VIBRATIONAL FREQUENCIES [J].
BOATZ, JA ;
GORDON, MS .
JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (05) :1819-1826
[4]   EXCITED-STATES AND PHOTOCHEMISTRY OF SATURATED MOLECULES - MINIMAL PLUS RYDBERG BASIS SET CALCULATIONS ON VERTICAL SPECTRA OF CH4, C2H6, C3H8, AND N-C4H10 [J].
CALDWELL, JW ;
GORDON, MS .
CHEMICAL PHYSICS LETTERS, 1978, 59 (03) :403-409
[5]   NEGATIVE-IONS OF POLYATOMIC-MOLECULES [J].
CHRISTOPHOROU, LG .
ENVIRONMENTAL HEALTH PERSPECTIVES, 1980, 36 (JUN) :3-32
[6]   ELASTIC AND INELASTIC-SCATTERING OF ELECTRONS BY METHANE AND ETHANE [J].
CURRY, PJ ;
NEWELL, WR ;
SMITH, ACH .
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1985, 18 (11) :2303-2318
[7]   THE CALCULATION OF FORCE CONSTANTS AND NORMAL COORDINATES .5. CONSTRAINED FORCE FIELDS FOR A SERIES OF METHYL AND DIMETHYL COMPOUNDS OF 3-FOLD SYMMETRY [J].
DUNCAN, JL .
SPECTROCHIMICA ACTA, 1964, 20 (07) :1197-1221
[8]  
HAYASHI H, 1989, COMMUNICATION
[9]  
Herzberg G., 1945, INFRARED RAMAN SPECT, VII
[10]   ABINITIO THEORETICAL FREQUENCIES AND INTENSITIES IN THE INTERPRETATION OF INFRARED-SPECTRA [J].
HESS, BA ;
SCHAAD, LJ ;
POLAVARAPU, PL .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1984, 106 (16) :4348-4352
123