서지주요정보
이테르븀(Yb) 원자의 3단계 광이온화 [$6s^2 1^So$ → $6s6p 3^P_1$ → $4f^{13}(2^F_{7/2})6s 2^6p_{3/2}$ (J=2) → 자동이온화 준위] 과정에 관한 실험 및 이론적 연구 = Experimental and theoretical investigation on the three step photoionization [$6s^2 1^So$ → $6s6p 3^P_1$ → $4f^{13}(2^F_{7/2})6s 2^6p_{3/2}$ (J=2) → autoionizing state] process in ytterbium (Yb) at
서명 / 저자 이테르븀(Yb) 원자의 3단계 광이온화 [$6s^2 1^So$ → $6s6p 3^P_1$ → $4f^{13}(2^F_{7/2})6s 2^6p_{3/2}$ (J=2) → 자동이온화 준위] 과정에 관한 실험 및 이론적 연구 = Experimental and theoretical investigation on the three step photoionization [$6s^2 1^So$ → $6s6p 3^P_1$ → $4f^{13}(2^F_{7/2})6s 2^6p_{3/2}$ (J=2) → autoionizing state] process in ytterbium (Yb) atom / 이종훈.
저자명 이종훈 ; Yi, Jong-Hoon
발행사항 [대전 : 한국과학기술원, 1995].
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소장정보

등록번호

8005872

소장위치/청구기호

학술문화관(문화관) 보존서고

DPH 95022

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초록정보

A three step photoionizaion process in ytterbium (Yb) atom was investigated experimentally and theoretically. The investigated photoionization scheme consisted of the excitation from ground state ($6s^2,^1S_0$) to the state of $4f^{13}6s^{2}6p$ $(7/2, 3/2)_2$ via firstly excited state (6s6p $^3P_1$) and the ionization by use of the autoionizing state. For the $6s^2\,^1S_0\,-\,6s6p\,^3P_1$ transition, we have measured the resonance line profile and Rabi oscillation. Fitting a set of density matrix equation to the resonance line profile and Rabi oscillation curve, we could measure the amount of phase diffusion of the laser and the oscillator strength of the transition. The effect of the laser spectral characteristics on the selective photoionization was investigated in 6s6p $^3P_1-4f^{13}6s^{2}6p$ $(7/2, 3/2)_2$ transition by using a multi-mode laser (5.2 GHz linewidth) and a single-mode laser (400 MHz linewidth). Notable increase of isotope selectivity was observed only for the case of the single-mode laser and therefore, in this case, we investigated the laser intensity and frequency dependencies of isotope excitation processes. Theoretical interpretation was made by using the rate equations including laser linewidth, Doppler broadening, and natural broadening effects. In the ionization stage, the autoionizing states of ytterbium in $50400 cm^{-1}$ - $60000 cm^{-1}$ energy range were investigated by three-photon polarization spectroscopy. In this work, 17 autoionizing states including many new ones were investigated and some states were suggested for efficient photoionization. For all these states, Fano parameters and J values are measured.

서지기타정보

서지기타정보
청구기호 {DPH 95022
형태사항 iii, 99 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jong-Hoon Yi
지도교수의 한글표기 : 공홍진
지도교수의 영문표기 : Hong-Jin Kong
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 94-99
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