Photoionization and excited-state dynamics of molecules with photoelectron imaging spectroscopy = 고분해 광전자영상분광장치를 이용한 분자의 들뜬상태 및 광이온화 동역학 연구

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The quantum mechanics provides accurate analysis for a wide variety of phenomena in physics and chemistry, such as transitions induced by emission or absorption of a photon. When the molecule absorbs photons, it can not only be photoexcited to another state or photoionized but also dissociated to their photofragments via photodissociation process The photodissociation process reflects molecular dynamics related to energy transfer between the various molecular modes, the breaking of chemical bonds and the creation of new ones, transitions between different electronic states. The detailed study of photodissociation provides intrinsic properties of bonding characters and the nature of an elementary chemical reaction in detailed state-to-state level. Studying the photoionization dynamics also provide important information such as the interaction between the photoelectron and motions of the atomic nuclei in the molecular system. Various photoelectron spectroscopic studies with the optical selection of specific excited state have been used to investigate the excited state specific photoionization/photodissociation dynamics in many molecular systems. To investigate and understand the photoionization or photodissociation dynamics of the molecule, the photoelectron imaging is employed. The photoelectron imaging provides electron kinetic energy and photoelectron angular distribution. The kinetic energies of the photoelectrons provide information on the internal states of the ion formed, which in turn reflect the levels populated in the excited sate. Analysis of photoelectron spectrum with theoretical simulations and propensity rule provides how many changes occur upon photoionization of molecule. The geometrical changes upon ionization can be reflected on change between initial and final ionized state. These allow us to understand the quantum state specific changes in photoionization of molecule. The photoelectron angular distributions are expected to yield useful ...
Advisors
Kim, Sang-Kyuresearcher김상규
Description
한국과학기술원 : 화학과,
Publisher
한국과학기술원
Issue Date
2013
Identifier
566088/325007  / 020097072
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 화학과, 2013.8, [ xii, 96 p. ]

Keywords

Photoionization; 광분해; 분광학; 화학동역학; 광이온화; 들뜬상태; photoexcitation; optical spectroscopy; atomic transition; photochemistry; excited sate; cation state; photoelectron imaging; photoelectron angular distribution; predissociation

URI
http://hdl.handle.net/10203/196439
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=566088&flag=dissertation
Appears in Collection
CH-Theses_Ph.D.(박사논문)
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