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Rovibrational-state selected photoionization of acetylene by the two-color IR + VUV scheme: observation of rotationally resolved Rydberg transitions

Journal article published in 2003 by X.-M. Qian, T. Zhang, A. H. Kung, K. C. Lau ORCID, C. Y. Ng, X. M. Qian;A H. Kung;Tao Zhang;K C. Lau;C Y. Ng
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

2030165010033 ; 電機工程學系　 ; We have demonstrated a rovibrational-state-selected photoionization experiment using an IR laser and high-resolution VUV-synchrotron radiation. The VUV photoionization of acetylene [C2H2(X˜ 1Σg+;ν3=1,J′=8   or   10)] prepared by IR excitation reveals three strong autoionizing Rydberg series converging to C2H2+(X˜ 2Πu;ν3+=1) with little ion background interference. Rotational transitions resolved for the Rydberg states provide an estimate of ≈1.8  ps for their lifetimes. This experiment opens the way for state-selective photoionization studies of polyatomic molecules using VUV-synchrotron radiation.