| Co-Investigator(Kenkyū-buntansha) |
YAKAKADO Hideo Wakayama Univ., Faculty of System Engineering, Associate Professor, システム学部, 助教授 (30242035)
YAMAKITA Yoshihiro Tohoku Univ., Graduate School of Science, Research Associate, 大学院・理学研究科, 助手 (30272008)
MISAIZU Fuminori Tohoku Univ., Graduate School of Science, Lecturer, 大学院・理学研究科, 講師 (20219611)
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| Research Abstract |
In this research project, we have developed a new apparatus for the study of photo-and Penning ionization spectroscopy by utilizing time-resolved imaging technique. Along with the development of a new experimental system, we also applied collision-energy-resolved Penning ionization spectroscopy to various molecules including organic molecules, transition metal-molecule complexes, and nonvolatile molecules.
As for the development of a new experimental apparatus, we construced an apparatus for the photo-and Penning ionization spectroscopy of various clusters and their ions. The apparatus consists of five-differentially evacuated chambers : (1) laser vaporization cluster ion source, (2) time-of-flight mass spectrometer for the mass-separation of the cluster ions, (3) magnetic-bottle-type electron energy analyzer, (4) nozzle discharge source for the production of rare-gas metastable atom beam, and (5) part for the production of pure and pulsed metastable beam. We have started experiment of the laser photoelectron spectroscopy of size-selected cluster negative ions. First we the checked performance of the time-of-flight mass spectrometer and the magnetic-bottle photoelectron energy analyzer for the silicon cluster negative ions, Si_n. Next the system of copper clusters reacted with NO molecules are investigated by this technique. Especially, the Cu_2N^- ions are found to have at least two different isomers : one has a structure of Cu_2^- with which an N atom is weakly bound, and another has a tightly bound structure. The imaging detection was also carried out in the magnetic-bottle electron spectrometer. The photoelectron image are found to be the one magnified almost 7 times from the original, which was a result almost as predicted. Finally, we are now optimizing the performance of the new metastable atomic beam. After this optimization, we can start the experiment of Penning ionization photoelectron spectroscopy of clusters.
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