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9 Polyynes (C 2n H 2 , n¼2-5)
and Other Products from
Laser-Ablated Graphite:
A Time-of-Flight Mass
Spectroscopic Study in
Combination with
One-Photon Ionization
Tomonari Wakabayashi, Yoshiyasu Kato,
Takamasa Momose and Tadamasa Shida
CONTENTS
9.1 Introductory Remarks.......................................... 182
9.2 Outline of the Study .......................................... 182
9.3 Experimental .................................................. 183
9.4 Results ........................................................ 185
9.4.1 Comparison of One-Photon and Multi-Photon
Ionization in the He Buffer Gas ........................ 185
9.4.2 One-Photon Ionization in the H 2 Buffer Gas ............ 187
9.4.3 Effect of Ablation Laser Power on the Mass
Spectral Pattern ........................................ 191
9.4.4 Structure and Formation Mechanism of the
Ablated Products ...................................... 193
9.5 Concluding Remarks .......................................... 193
Acknowledgment . ................................................... 194
References .......................................................... 194
181
 
 
 
 
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