The Design of Multimass Ion Image Detector and Its Application on The Detection of Photodissociation Experiment

• Main Authors: Shang-Ting Tsai, 蔡尚庭
• Other Authors: 李遠哲
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/40585659922654039544

博士 === 國立臺灣大學 === 物理學研究所 === 88 === To study the photodissociation process of chemical molecules is important. There are many methods to study the process. Two of them are usually used. One is to study the spectrum of phodissociation products. This method only can be used in few and small size of molecules. The other is to study the available energy distribution of phodissociation products. This method can be used in any molecules. By matching the momentum of two products, the process and the available energy can be precisely detected. The lifetime and dissociation rate of the hot molecule of parent molecule are detected. The lifetime at 193 nm of hot molecule of C6D6、C6D5CD3 and C6H5CF3 are 22μs、17μs and 9μs. The 193 nm single photon photodissociation products of C6D6、C6D5CD3 and C6H5CF3 are only directly bond breaking products. The ring-opening process of C6D6、C6D5CD3 and C6H5CF3 at 193 nm are all multiphoton process.