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Chin. Phys. B, 2017, Vol. 26(12): 124208    DOI: 10.1088/1674-1056/26/12/124208

Time-resolved spectroscopy for 5s'4D7/2 state transitions undergoing electron-ion recombination in femtosecond laser-produced copper plasma

Hai-Ying Song(宋海英)1, Hui Li(李辉)1, Yan-Jie Zhang(张艳杰)1, Peng Gu(谷鹏)1, Hai-Yun Liu(刘海云)1, Wei Li(李维)2, Xun Liu(刘勋)2, Shi-Bing Liu(刘世炳)1
1. Strong-field and Ultrafast Photonics Laboratory, Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China;
2. Beijing Institute of Space Mechanics and Electricity, China Academy of Space Technology, Beijing 100094, China
Abstract  In the femtosecond laser-produced Cu-plasma, the transient transition dynamics that the excited state 5s'4D7/2 via electron-ion recombination transfers to 4p'4F9/20 (465.11 nm, Λ1 line) and 4p'4D7/20 (529.25 nm, Λ2 line) states are investigated by using the time-resolved spectroscopy. The occupation number and relevant lifetime of the excited state 5s'4D7/2, the temporal evolutions of spectral intensities for Λ1 line and Λ2 line emissions are demonstrated to be in direct proportion to the employed laser intensity, which reveals the transient features of transition dynamics clearly differing from that resulted in the traditional collision excitation. Furthermore, some unique characteristics for Λ1 and Λ2 transitions stemming from electron-ion recombination are examined in detail.
Keywords:  time-resolved spectroscopy      recombination transition      laser-produced plasma  
Received:  21 June 2017      Revised:  31 July 2017      Accepted manuscript online: 
PACS:  42.50.Dv (Quantum state engineering and measurements)  
  78.47.J- (Ultrafast spectroscopy (<1 psec))  
  78.47.N- (High resolution nonlinear optical spectroscopy)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51705009) and the NSAF of China (Grant No. U1530153).
Corresponding Authors:  Shi-Bing Liu     E-mail:

Cite this article: 

Hai-Ying Song(宋海英), Hui Li(李辉), Yan-Jie Zhang(张艳杰), Peng Gu(谷鹏), Hai-Yun Liu(刘海云), Wei Li(李维), Xun Liu(刘勋), Shi-Bing Liu(刘世炳) Time-resolved spectroscopy for 5s'4D7/2 state transitions undergoing electron-ion recombination in femtosecond laser-produced copper plasma 2017 Chin. Phys. B 26 124208

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