Photoexcitation study of the 4s 2S1/2 state of atomic sodium

被引：12
|
作者：
Rafiq, M. [1 ]
Kalyar, M. A. [1 ]
Baig, M. A. [1 ]
机构：
[1] Quaid I Azam Univ, Dept Phys, Atom & Mol Phys Lab, Islamabad 45320, Pakistan
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2008年 / 41卷 / 11期
关键词：
D O I：
10.1088/0953-4075/41/11/115701
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the first measurements of oscillator strengths for 4s S-2(1/2)-> np P-2(1/2,3/2) (19 <= n <= 57) Rydberg transitions in atomic sodium using a thermionic diode ion detector in conjunction with an Nd:YAG pumped dye laser system. The f-values have been calibrated with the measured photoionization cross-section from the 4s S-2(1/2) excited state at the first ionization threshold as 0.65(0.10) Mb. The binding energy of the 4s S-2(1/2) level is determined as 15 709.444(8) cm(-1) by employing the Rydberg relation to the observed np P-2(1/2,3/2) Rydberg series. Addition of the binding energy to the known energy of the 4s S-2(1/2) level yields the first ionization potential of sodium as 41 449.44(1) cm(-1), which is in excellent agreement with the recognized value.
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页数：7
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