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Measurement of Photoionization Cross Section of Sodium |
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PP: 15-20 |
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Author(s) |
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M. Atif,
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Abstract |
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| An atomic beam apparatus has been used to observe the sodium spectrum using two-step laser excitation schemes. An R6G dye laser pumped by an excimer laser 308 nm excites the atom from the 3s 2S1/2 ground state to the 3p 2P1/2 or 3p 2P3/2 multiplets of the first excited state which are further ionized by a photon from the 308 nm of the Excimer laser. The ions are directed to the channeltron by applying a negative voltage. The ions signal from the channeltron has been recorded on a computer after processing through a box car averager. The absolute value of the photoionization cross sections for Na has been measured as 4.520.8 Mb The present measured value of photoionization cross sections are in excellent agreement with the existing experimental and theoretical work. |
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