서지주요정보
$CF_3I$ 기체의 전기 펄스 방전으로 생기는 1.315μm(I[$5^2P_\frac{1}{2}$]→I[$5^2P_\frac{3}{2}$]) 복사 = 1.315μm(I[$5^2P_\frac{1}{2}$]→I[$5^2P_\frac{3}{2}$]) emission from pulsed electric discharge in gaseous $CF_3I$
서명 / 저자 $CF_3I$ 기체의 전기 펄스 방전으로 생기는 1.315μm(I[$5^2P_\frac{1}{2}$]→I[$5^2P_\frac{3}{2}$]) 복사 = 1.315μm(I[$5^2P_\frac{1}{2}$]→I[$5^2P_\frac{3}{2}$]) emission from pulsed electric discharge in gaseous $CF_3I$ / 이용탁.
저자명 이용탁 ; Lee, Yong-Tak
발행사항 [서울 : 한국과학기술원, 1979].
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소장정보

등록번호

4000613

소장위치/청구기호

학술문화관(문화관) 보존서고

MAP 7906

SMS전송

도서상태

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반납예정일

초록정보

The excitation of the dissociated iodine atom to the state of $I(5^2 P_{\frac{1}{2}})$ is achieved by the short electric pulse discharge in the mixture of gaseous $CF_3I$ and the buffer gases Ar, $N_2$. The infrared radiation (1.315 μm) emitted by the transition of iodine atom from $5^2P_{\frac{1}{2}}$ to $5^2P_{\frac{3}{2}}$ state is detected by a Ge PIN photodiode with the infrared filter with narrow bandpass transmission at $\lambda$ = 1.3 μm. The buffer gases Ar, $N_2$ are found to play an important role in formations of glow discharge and for the stabilization of the cavity in the discharge process. The measured value of the effective life time $\tau_{eff}$ of the excited iodine atom $I(S^2P_{\frac{1}{2}})$ is about 200 $\mu\sec$ at the pressure 0.5torr of $CF_3I$ and 40-100 torr of Ar, and 100-200 $\mu\sec$ at the pressure 0.5 torr of $CF_3I$ and 15-20 torr of $N_2$, which is far smaller than the life time, 0.13 $\sec$, of the spontaneous transition calculated by Gastang or Zuev. Over the pressure 0.5 torr of $CF_3I$, the cavity is very unstable and glow discharge is impossible. The quenching effect or the deactivation effect of $O_2$ and $I_2$ upon the iodine $5^2P_{\frac{1}{2}}$ state seems quite large, but the pressure of the buffer gases has the least effect on the life time of the excited iodine atom. So, the oxygen should be removed most in a vacuum system prior to the inlet of $CF_3I$ gas. Another important factor for glow discharge is electrode shape. The design of the discharge chamber and electrodes are changed several times for the uniform glow discharge and finally the Change's profile is adopted.

서지기타정보

서지기타정보
청구기호 {MAP 7906
형태사항 iii, 56 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Yong-Tak Lee
지도교수의 한글표기 : 이상수
지도교수의 영문표기 : Sang-Soo Lee
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 53-56
주제 Infrared radiation.
Iodine --Spectra.
기체 방전. --과학기술용어시소러스
방사 (복사) --과학기술용어시소러스
요오드. --과학기술용어시소러스
Glow discharges.
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