Transcript Electron-molecule collision cross sections for plasma

Electron Collision Data of
C-H &C-F Compound Molecules for Plasma Modeling
Present Status of Our Research Proposal
Hiroshi Tanaka
Department of Physics
Sophia University, Tokyo, JAPAN
2nd Research Co-ordination Meeting of the IAEA’s Co-ordinated Research
Program on” Atomic and Molecular Data for Plasma Modeling”
IAEA, Vienna, Austria 19 Jun. 2007
TITLE OF RESEARCH TOPIC proposed
2005-2006
Electron Collision Data of C-H Compound Molecules
for Plasma Modeling
2007
Electron Collision Data of C-H & C-F Compound Molecules
for Plasma Modeling
PROJECT PERSONNEL
Chief Scientific Investigator:
Hiroshi TANAKA (Prof. Sophia Univ. JAPAN)
Other Supporting Scientific Staff:
Masamitsu HOSHINO (Dr. Sophia Univ. JAPAN)
Mineo KIMURA (Prof. Kyushu Univ. JAPAN)
Michael J. BRUNGER (Prof. Flinders Univ. AUSTRALIA)
Stephen J. BUCKMAN (Prof., Australian Nat’l Univ. AUSTRALIA)
Casten MAKOCHEKANWA (Dr. Australian Nat’l Univ. AUSTRALIA )
Hyuck CHO (Prof. Chungnam Nat’l Univ. South KOREA)
A: Results for the project
Summary of WORK PLAN proposed (in 2005)
Year 1:
Evaluation and analysis of related data available in literature but
scattered in different places all over the world within the framework of
IAEA International Bulletin on Atomic and Molecular Data for Fusion.
Year 2:
Compilation and addition of new data from our group as well as from
other research groups to the database. In the same process, data from
our group will be systematically compiled for the more than 30
molecules studied so far for the collision processes: elastic, vibrational
and electronic excitations, and total cross sections.
Year 3:
Proposal of new directions for producing missing but necessary
experimental and theoretical data for these processes related to fusion
and plasma processing plasmas.
Outlook (presented in 2005)
EELS:
Elastic Scattering: C3H6 C3F6 COF2
Vibrational Excitation : C3H6 C3F6 COF2
Electronic Excitation : C3F6 COF2 (H2O, DNA bases)
QMSS:
Radical Detection: CHx (X = 30) from CH4
Our Data Base to be prepared in IAEA,NIFS Report, and AAMOP
Results (publication list related to IAEA)
1) Experimental and theoretical elastic cross sections for electron collisions
with the C3H6 isomers,
C. Makochekanwa et al, J. Chem. Phys. 124 024323-1 (2006)
2) Experimental observation of neutral radical formation from CH4 by electron
impact in the threshold region,
C. Makochekanwa et al, Phys. Rev. A 74 042705 (2006)
3) Low energy electron energy-loss spectroscopy of CF3X (X=Cl, Br),
M. Hoshino et al, J. Chem. Phys. 126 024303 (2007)
4) Electron and positron scattering from 1,1-C2F2H2,
C. Makochekanwa et al, J. Chem. Phys. 126 164309-1 (2007)
Activities on Data Compilation
Our Data Base has been prepared as IAEA & NIFS Report,
and a revised version will be arranged for IAEA Bulletin, Ad.
At. Mol. Opt. Phys, or J. Chem. Phys. Data
The Projects for NIFS (2003-2006) and JAERA(2004-2006),
in Japan, were accomplished in the last fiscal year, this
March
Role of NIFS
NETWORK
ＮＩＦＳ,
KAERI, & NFRC
ＮＥＴＷＯＲＫ
Research Institute
University
Research Society
Industry
Individual
Report for
Database for electron collision with polyatomic molecules
IAEA & NIFS report (to be submitted):
Elastic Differential Cross Sections for Electron Collisions
with Polyatomic Molecules
IAEA bulletin (being prepared):
Database for Electron Collisions with Polyatomic Molecules:
Elastic- and Resonant Vibrational Excitation-Differential Cross Sections
IAEA & NIFS Report
(2007)
Elastic Differential Cross Sections for Electron Collisions
with Polyatomic Molecules
M. Hoshino1, H. Kato1, C. Makochekanwa1, 2, S.J. Buckman2, M. J. Brunger3,
H. Cho4, M. Kimura5, D. Kato6, I. Murakami6, T. Kato6, and H. Tanaka1
1Department
of Physics, Sophia University, Tokyo 102-8554, Japan
for Antimatter-Matter Studies, Australian National University, Canberra ACT 0200, Australia
3Center for Antimatter-Matter Studies, Flinders University, Adelaide SA 5001, Australia
4Department of Physics, Chungnam National University, Daejeon 305-764, Korea
5Graduate School of Sciences, Kyushu University, Fukuoka 812-8581, Japan
6National Institute of Fusion Science, Toki 509-5292, Japan
2Center
1 Introduction
2 Definition of Cross Sections
3 Experimental Techniques for Precision Measurement of Elastic DCS
4 Benchmark Cross Section for Elastic DCS
A. Fusion Plasma-Related Gases
B. Processing Plasma-Related Gases
C. Environmental Issues-Related Gases
5 Concluding Remarks
This work is supported partially by the IAEA, CUP, MEXT, and ARC
List of Molecules tabulated in this report
A. Fusion Plasma-Related Gases
CH4, C2H6, C3H8, C2H4, C3H6, isomers-C3H4
B. Processing Plasma-Related Gases
CF4, C2F6, C3F8, C3F6, cyclo-C4F8, C2F4, C6F6,
CH3F, CH2F2, CHF3 , CF3I
NF3, SF6
SiH4, Si2H6, GeH4
C. Environmental Issues -Related Gases
CF3Cl, CF3Br
H2O, CO2, N2O
New Version for IAEA Bulletin , Ad. At. Mol. Opt. Phys., or J. Chem. Phys. Data
Database for Electron Collisions with Polyatomic Molecules:
Elastic- and Resonant Vibrational Excitation -Differential Cross Sections
M. Hoshino1, H. Kato1, C. Makochekanwa1, 2, S.J. Buckman2, M. J. Brunger3,
H. Cho4, M. Kimura5 and H. Tanaka1
1Department
of Physics, Sophia University, Tokyo 102-8554, Japan
for Antimatter-Matter Studies, Australian National University,
Canberra ACT 0200, Australia
3Center for Antimatter-Matter Studies, Flinders University, Adelaide SA 5001, Australia
4Department of Physics, Chungnam National University, Daejeon 305-764, Korea
5Graduate School of Sciences, Kyushu University, Fukuoka 812-8581, Japan
2Center
1 Introduction
2 Definition of Cross Sections
3 Experimental Techniques for Precision Measurement of Elastic DCS
4 Benchmark Cross Section for Elastic DCS
A. Fusion Plasma-Related Gases
B. Processing Plasma-Related Gases
C. Environmental Issues-Related Gases
5 Resonant Vibrational Excitations
6 Concluding Remarks
This work is supported partially by the IAEA, CUP, MEXT, and ARC
SUMMARY of ACTIVITIES for DATABASE from 2005 to 2008
Target Molecules:
H-C Molecules produced from the internal wall materials of fusion
chambers
H-C & C-F Molecules for plasma processing
Research directions for the first two years:
2005: compilation and analysis of data already available in
literature that relates to this filed of plasma modeling
2006: analyzing recent data from our collaboration group in
conjunction with related data from other laboratories on cross
sections from these molecules
Our Database compiled is restricted only to our own elastic DCS
continued
Research directions for 2008 and in future:
2008: propose directions for experimentalists and theorists to come
up with new cross section data that would make the database for
each molecule as complete as feasible as relates to the application to
the fusion- and plasma processing- plasmas (proposed 2005)
Furthermore, being proposed as follows:
Experimental Verification for BEf - Scaling Law in Electron-Molecule
Collision
B: Progress in the project
Data Needs for Electron collision cross section of
plasma-relevant gases –
present and future
H.TANAKA and M. HOSHINO
Department of Physics
Sophia University
Tokyo, Japan
2nd Research Co-ordination Meeting of the IAEA’s Co-ordinated Research Program
on ” Atomic and Molecular Data for Plasma Modeling”
IAEA, Vienna, Austria 19 Jun. 2007
Collaboration
International
Chugnam National University ( Prof. Cho S. Korea)
Australian National University (Prof. Buckman AU)
Flinders University of Southern Australia (Prof. Brunger AU)
The Open University (Prof. Mason UK)
NIFS (Dr. Y.-ki Kim deceased)
Domestic
Kyushu University (Prof. Kimura, Collaboration Theoretical)
NIFS (Prof. Kato under the Japan-Korea CUP program)
JAERI (Dr. Kubo under the Fusion Plasma Project in Japan)
Tohoku University(Prof. Ueda, SR experiment at Spring-8)
RIKEN (Prof. Yamazaki, Highly Charged Ion Research)
Group Members
Dr. M. Hoshino (Assist. Prof.) :
T. Tanaka (D3) : SR Experiment
H. Kato (D2) : EELS
H. Kawahara (M1) : EELS
Y. Nagai (M1) : EELS
Kobayashi (M1) : Threshold Electron Spectroscopy by TOF
Tomita (M1) : Positron Experiment
Ishii (M1) : Negative Ion & LEED ( now in US)
Kanazawa( M1) : Capillary Experiment on Highly Charged Ion
Views from Database
Data providers
(Atomic physicists)
* theory
* experiment
assessed data on electron collision cross sections
Data provide
Hard to find or
request data
Data users in various
application fields
* fusion science
* astrophysics
* industrial plasmas
* environmental physics
* medical (radiotherapy)
etc.
Data centers
data compilation
data evaluation (important but not easy)
dissemination and updating of database
retrievable online database
= easy to access, use, find data
International A&M
data center
network
IAEA, NIFS,
NIST, ORNL,
GAPHIOR, etc.
Research Sites
Sophia
electron
positron
Atom
Molecule
photon
SPring-8
Surface
scattered electron
ejected electron
secondary-photo
-Auger-electron
ion
positive / negative ion, radical
RIKEN
Science Univ. of Tokyo
Photon Factory
Electron Interactions with Molecule
Collision Processes of Interest
Quantitative Differential Cross Section Measurements
Electron Energy-loss Spectroscopy (EELS):
Elastic Scattering DCS
Resonant Phenomena in Vibrational Excitation
Electronic Excitation Process, GOS
Quadra- Pole- Mass Spectroscopy (QMSS)
Non-radiative Dissociation Products
(Threshold Ionization Spectroscopy)
Dissociative Attachment Processes
Low Energy Electron Diffraction (LEED)
Surface and Phase Transition
(previously presented in 2005)
Measurements of electron collision-cross sections
Definition of various
Cross Section
Transmission experiment
Crossed beam method
I  I 0eQT Nl
QT   qn
n
※Upper limit of cross sections
・Differential Cross Section for
channel “n”
σn ( E0 , ) 
(n  m)
dqn ( E0 , ) k f
2

f n ( E0 , )
d
ki
・Integral and Momentum transfer
Cross Section
qM ( E0 )     0 ( E0 , )(1  cos  ) sin dd
2 
qn ( E0 ) 
 
n
( E0 , ) sin dd
Boltzmann equation
f t  v   X f  ( F m)  v f  [f t ]c
0 0
・Total Cross Section
Q T ( E0 )   qn ( E0 )
n
Swarm experiment
On-going and Near -future Measurements
EELS:
Elastic Scattering: (CH3)O, C6H5 X (X=H, CH3, CF3)
Vibrational Excitation : (CH3)O, C6H5X (X=H, CH3, CF3),
CH3X (X=I, Br), (CH3)O
Electronic Excitation : H2, CO, NO, H2O, C6H5 X (X=H, CH3, CF3)
CH3X(X=I, Br)
Excited Molecular Target: vibratinally excited H2, CO2 (in progress)
QMSS:
Radical Detection: CHx (X=1,2,3) from CH4
Negative Ion Detection: CH4, F2CO & Condensed-Phase (in progress)
LEED:
Anti-ferromagnetic Surface: NiO, CoO, FeO (in progress)
SR:
Inner-shell soft X-ray photoelectron & Auger electron spectroscopy
Collision Data for Molecules by Electron Impact
investigated at Sophia University
CH4, C2H6, C3H8, C2H4, C3H4, C3H6
CF4, C2F6, C3F8, C2F4, c-C4F8, C6F6, C3F6
CF3H, CF2H2, CFH3, CH3I, CH3Br
CF3Cl, CF3Br, CF3I
CF2Cl2, CFCl3, 1,1-C2F2H2
SiH4, Si2H6, SiF4, GeH4
NF3, C60, C6H6, C6H5CH3, C6H5CH3, (CH3)2CO
N2O, CO2, COS, H2O, CS2, XeF2, HCN
H2CO
H2, CO, N2, NO, He
(molecules marked pink after the 1st RCM)
1) EELS
Why (CH3)2O and C6H5 X (X=H, CH3, CF3)?
(CH3)2O: Alternative of the car fuel
C6H5CH3 and C6H6: Volatile Organic Molecule (VOC),
Chemical Hazard regulated under the PRTR
(Pollutant Release and Transfer Register )
Toluene: VOC (volatile organic molecule)
C6H5CH3, C6H5CF3
C6H6
PRTR (Pollutant Release and Transfer Register)
Atmospheric Discharge Plasma
Elastic DCS
Comparisons of C6H6, C6H5CH3 and C6H5CF3
100
100
100
H. Cho et al., J. Phys. B 34, 1019 (2001).
DCS (10 cm /sr)
DCS (10 cm /sr)
2
10
-16
-16
2
10
1
1
1
0
30
60
90
120
Scattering Angle (deg)
150
180
10
-16
DCS (10 cm /sr)
elastic
Impact 1.1 eV
Impact 4.9 eV
Impact 8.5 eV
Impact 15 eV
FWHM = 40 meV
DCS error 10 %
2
C6H5CF3
elastic
Impact 4.5 eV
Impact 7.5 eV
Impact 15 eV
FWHM = 40 - 45 meV
DCS error 13 %
C6H5CH3
elastic
Impact 1.5 eV
Impact 4.5 eV
Impact 7.5 eV
Impact 15 eV
FWHM = 40 - 50 meV
DCS error 13 - 17 %
C6H6
0
30
60
90
120
Scattering Angle (deg)
150
180
0
30
60
90
120
150
180
Scattering Angle (deg)
H. Cho et al., J. Phys. B 34, 1019 (2001).
Loss 0.38eV
aromatic C-H streching
CH3 asym streching
sym streching
aromatic C-H streching
60
sym streching
CH3 asym streching
80
Toluene
Impact 7.5 eV 90deg
aromatic C=C
100
Intenstity (arb. units)
Loss 0.17eV
CH3 umbrella mode
CH3 asym bending
aromatic C=C
CH3 umbrella node
CH3 asym bending
Energy Loss Spectrum of Toluene - vibrational excitation
40
20
0
-0.2
-0.1
0.0
0.1
0.2
0.3
Energy Loss (eV)
0.4
0.5
0.6
Total Cross Section & Resonant Vibrational Excitation
Vibrational Excitation Functions for the stretching vib. modes
C-H str
C6H5CF3
7 eV
4.5 eV
15
Scattering Angle 90 deg
Energy Loss 0.374 eV
10
-18
2
DCS (10 cm /sr)
5
0
7.5 eV
5 eV
15
C6H5CH3
Scattering Angle 90 deg
Energy Loss 0.380 eV
1.5 eV
10
5
0
5 eV
15
C6H6
8 eV
Scattering Angle 90 deg
Energy Loss 0.380 eV
10
5
0
0
5
10
15
20
Impact Energy (eV)
25
30
Shape resonance
e-
Ueff
e-
direct scattering
l(l+1)/r2
ea
- U0
r
eshape resonance
Substituting effects on Electronic Excitation
2.0
1
Impact Energy 100 eV
Scattering Angle 5 deg
C6H5CF3
C6 H6
C6H5CH3
E1u
-16
2
DCS (10 cm /sr)
1.5
I. P.
9.685 eV
1
I. P.
9.246 eV
I. P.
8.82 eV
B2u
1.0
x 100
0.5
x 40
x 40
1
4
6
E2g
or
1
B1u
0.0
2
8
Energy Loss (eV)
10
12
14
BEf -scaling proposed by Yong-ki Kim
1. Ionization cross section
Deduction of unavailable data
Y.-K. Kim and M. E. Rudd, Phys. Rev. A 50, 3954 (1994)
2. Optically allowed electronic excitation for Atom
 BEf
 PWB
f accur
T


 PWB
T  B  E
f PWB
4a02 R
4a02 R ( Ka0 )2max F0 ( K ) d ( Ka0 ) 2

FPWB (T ) 
T
T ( Ka0 )2min E / R ( Ka0 ) 2
BEf -scaling proposed by Yong-ki Kim
3. Electronic excitation cross sections in CO
1
A
Impact Energy 50 eV
angle 8.5 deg
1 +
C
-16
2
DCS (10 cm /sr)
0.3
I.P.
0.2
1
E
0.1
1 +
B
0.0
8
10
12
Energy loss (eV)
14
DCS for v =2 of the A state in CO
A  (=2) ← X 
1
1 +
Impact Energy 50eV
Sophia's Data
Flinder's Data
Flinder's Data (80%)
10
-18
2
DCS (10 cm /sr)
100
1
0.1
0
20
40
60
angle (deg)
80
100
GOS of v =2 of the A state in CO
0.050
A1 (=2) ← X1+
0.045
GOS (a. u. )
0.040
OOS= 0 .0 3 8 8 6
100 eV
200 eV
0.035
0.030
0.025
0.020
0.015
0.010
0.005
0.000 -3
10
10-2
10-1
2
100
K (a. u. )
101
102
Concepts of Yong –ki Kim’s Theory
We use the BEf - scaling on Born

T
faccu
 

 BEf (T)  
 Born (T)
fBorn  

(T

B

E)


where T = incident energy of the electrons
B = Binding energy

E = Excitation Energy
faccu = accurate optical oscillator strength (OOS) value
fBorn = value of the optical oscillator strength obtained from
the same wavefunctions used to calculate Born
Scaling parameters for CO
Generalised oscillator strengths (GOS) for the A1(=7)X1+(=0)
excitation of CO are available from Chantranupong et al
The GOS must be integrated over angles (≡momentum transfer Ka0) to
get Born. This is achieved using the analytic formula of Vriens with one
fitting constant a:
GOS  fBorn
1 Ka  a
2
0
6
(1)
Here we also use the accurate OOS for the A1 state from Berkowitz

40
1
1 +
A  (=2) ← X 
Sophia + Flinders Data
Z. P. Zhong
P. W. Zetner
E. N. Lassettre
J. Zobel
Born, unscaled
Born, BEf-scaled
-18
2
ICS (10 cm )
30
20
10
0
10
100
Impact Energy (eV)
1000
Comparisons for the ICS
the scaling & the present data
40
=0
=1
=2
=5
=6
=3
30
2
ICS (10 cm )
20
-18
10
0
40
=4
=7
A←X
1
30
1 +
Sophia + Flinders Data
Z. P. Zhong
P. W. Zetner
E. N. Lassettre
J. Zobel
Born, unscaled
Born, BEf-scaled
20
10
0
10
100
1000
10
100
1000
10
100
Impact Energy (eV)
1000
10
100
1000
ITER (International Thermonuclear Reactor)
Data Needs for
Carbon impurities (H/D-C molecules) produced by
physical and chemical sputtering
CH/D3, CH/D4, C2H/D2, C2H/D4, C2H/D6, C3H/D8
Vibrationally (Hot) excited Molecules
H2, D2
Neutral Radical Detection- ionization threshold spectroscopy
Table 1. Ionization thresholds
e + CH4
CH3 + H + e
Parent
neutral
CH4+
CH3+
CH2+
CH+
C+
CH4
12.6
14.3
15.1
22.2
25
9.8
15.1
17.7
25
10.3
17.4
20.2
13.0
20.3
CH3
CH2
CH
e + CH3
CH3+ +2e
C
16.8
Non-radiative CH3 Radical
from CH4 by Electron Impact
-16
Absolute cross section (10
cm2 )
CH3 nuetral radical
1.5
present work
Sugai et al.
Moore et al.
1.0
0.5
0.0
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Impact energy (eV)
1.4
CH3ラジカル
1.2
1.0
0.8
0.6
0.4
0.2
0.0
4
6
8
10
12
Impact energy (eV)
Absolute Cross Section ( ×10-16cm2 )
-16
Absolute cross section (10
cm2 )
Radical production near threshold
14
1.6x10-16
Moore
Sugai
1.4x10-16
1.2x10-16
1.0x10-16
8.0x10-17
6.0x10-17
4.0x10-17
？
2.0x10-17
0.0
8
10
12
Impact Energy (eV)
14
16
Trapped electron current
Electronic excitation of CH4 by electron impact
Energy Loss
Triplet
Singlet
1
3T
Threshold Energy
1 1T2
2
Ethr
2
4
6
8
10
12
14
16
1 3 T2:
7.5 eV
1 1 T2:
8.5 eV
18
Electron acceleration voltage Va (V)
―
Optical excitation spectrum
H.H.Brongersma and L. J. Oosterhoff, Chem. Phys.Lett. 3 437 (1969)
Comparison of present and optical results
CH4 photoab., Kameta et al.
CH4 neutral diss., Kameta et al.
CH4 photoab., Au et al.
1.0
2
1.5
Cross sections (10 cm )
1.0
-16
-16
Absolute cross section (10
cm2 )
present work
1
T2
0.5
0.0
3
4
5
6
0.5
T2
7 8 9 10 11 12 13 14 15
Impact energy (eV)
0.0
K. Kameta, N. Kouchi, M. Ukai, Y. Hatano
J. Electron Spectrosc. Relat. Phenom. 123, 225
(2002)
-16
Absolute cross section (10
cm2 )
Low Lying 3T2 contribution for producing CH3
0.16
CH3ラジカル
0.14
0.12
8.5 eV
0.10
1 1T2
0.08
+
0.06
1 3T2
0.04
Other
channels
0.02
0.00
7
9
8
Impact energy (eV)
10
present work
CH4 photoab., Kameta et al.
CH4 neutral diss., Kameta et al.
CH4 photoab., Au et al.
2
1.5
Cross sections (10 cm )
1.0
-16
-16
Absolute cross section (10
cm2 )
Higher electronic excitation states
0.5
0.5
4s Rydberg
0.0
5
6
Jahn-Teller
7
8
9 10 11 12
Impact energy (eV)
13
0.0
Negative ion formation on CH4 + e
20
CH4
CH4 + e  CH3
CH2CHC-
Total
CH2
-
gas phase or surface
Intensity (arb. units)
?
-
CH
CH3
15
C
-
10
5
?
0
8
9
10
11
12
13
Impact Energy (eV)
14
15
Electron impact cross section
from vibrationally excited CO2
Synchrotron Radiation Experiments : hot Molecules
CO2: Molecular Properties
B1 state
(linear)
Photon Energy
Energy (arb. units)
A1 state
(bent)
1s*core
excited states
0deg ARIY
spectra
h
Electronic
ground state
2=1
2=0
100 180 100
Bond angle (deg)
Angle resolved ion yield spectra of hot-CO2
 resonance
T. Tanaka et al, PRL 95 203002 (2005)
Angle resolved ion yield spectra of hot-N2O
in the region of shape resonance
Intensity (arb. units)
0.6
initial state
ground (0,0,0)
bending excited (0,1,0)
* shape resonance
0.4
*
*
Rydberg
(Nc)
(Nt)
-1
Nt1s
-1
Nc1s
0.2
0.0
400
410
420
430
440
450
Photon energy (eV)
T. Tanaka et a, PRL submitted
Outlook
EELS:
Elastic Scattering: CH3)O, C6H5 X (X=H, CH3, CF3)
Vibrational Excitation :CH3)O, C6H5X (X=H, CH3, CF3), CH3X (X=I, Br), (CH3)O
Electronic Excitation : H2, CO, NO, H2O, C6H5 X (X=H, CH3, CF3), CH3X(X=I, Br)
QMSS:
Radical Detection: CHx (X=1,2,3) from CH4
Negative Ion Detection: CH4, F2CO & Condensed-Phase (in progress)
QMSS:
Radical Detection: CHx (X=1,2,3) from CH4
Negative Ion Detection: CH4, F2CO & Condensed-Phase (in progress)
Database prepared for IAEA &NIFS Report
SR:
Inner-shell soft X-ray photoelectron & Auger electron spectroscopy
Excited Molecular Target: vibratinally excited H2, CO2 (in progress)
A revised Database being prepared for AAMOP
Molecules investigated
A. Fusion Plasma-Related Gases
CH4, C2H6, C3H8, C2H4, C3H6, isomer- C3H4
B. Processing Plasma-Related Gases
CF4, C2F6, C3F8, C3F6 cyclo-C4F8, C2F4, C6F6,
CH3F, CH2F2, CHF3 NF3, (SF6 )
SiH4, Si2H6, GeH4, SiF4
F2CO
C. Environmental Issues -Related Gases
CF3Cl, CF3Br,
CF3I, CF2Cl2, CFCl3
CO2, N2O,( H2O), OCS, CS2 H2CO,
C6H5X(X=H,CH3,CF3), (CH3)2O, CH3I
Review Articles previously published
Review articles after 1990,
1. International Bulletin on Atomic and Molecular Data for Fusion, 42(1992)-58(2000)
published by IAEA,
2. Collision Data Involving Hydro-Carbon Molecules, H. Tawara, Y. Itikawa, H. Nishimura,
H. Tanaka, and Y. Nakamura, NIFS-DATA-6 July (1990)
3. Atomic Data and Nuclear Data Tables 76 (2000) 1
4. One Century of Experiments on Electron-Atom and Molecule Scattering: a Critical
Review of Integral Cross-sections Ⅱ-Polyatomic Moecules,Ⅲ-Hydrocarbons and
Halides, G. P. Karwasz, R. S. Brusa, and A. Zecca,
La Rivista del Nuvo Cimento 24 (1) (4) 2001
5. Analytic Cross Sections for Electron Collisions with Hydrocarbons: CH4, C2H6, C2H4,
C2H2, C3H8, and C3H6, T. Shirai, T. Tabata, H. Tawara, and Y. Itikawa, Atomic Data and
Nuclear Data Tables 80, 147-204 (2002)
6. Interaction of Photons and Electrons with Molecules, M.J.Brunger and S.J.Buckman,
Photon and Electron Interactions with Atoms, Molecules, and Ions, vilI/17, sub-volume
C ed Y. Itikawa, Landorf-Beurnstein (2003, Berlin: Springer) p6-118
7. Collision Processes of C2, 3Hy and C2, 3Hy Hydrocarbons with electrons and Protons
R. K .Janev and D. Reiter, Phys. Plasma 11 (2004) 780
8. Vibrational Excitation of Polyatomic Molecules by Electron Collisions
Y. Itikawa, J. Phys. B: At. Mol. Opt. Phys 37 R1-24 (2004)