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中国激光

NaK（E）态的离解和Na（3PJ）精细结构分支比

沈异凡, 李万兴

Published Jan 1, 2002• 0 citations
OpenAlex

Abstract

研究了Na(3S)+K(4S)+nhν→Na(3PJ)+K(4S)+(n-1)hν过程,激光频率ν调到Na共振跃迁的两翼,分支比定义为I(D1)/I(D2),I(D1),I(D2)分别是NaD1,D2线的强度,在K密度2～8×1020 m-3范围内,测量了从Na共振跃迁的蓝翼300 cm-1到红翼100 cm-1的分支比,得到了离解率之比和精细结构转移截面,在近翼,分支比与ν有很大的关系.用对Na3PJ态共振激发的方法,也得到了精细结构转移截面,对结果进行了讨论.

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ACTA PHOTONICA SINICA•Jan 1, 2002•0 citations
研究了Na(3S)+K(4S)+nhν→Na(3PJ)+K(4S)+(n-1)hν过程,激光频率ν调到Na共振跃迁的两翼,分支比定义为I(D1)/I(D2),I(D1),I(D2)分别是NaD1,D2线的强度,在K密度2～8×1020 m-3范围内,测量了从Na共振跃迁的蓝翼300 cm-1到红翼100 cm-1的分支比,得到了离解率之比和精细结构转移截面,在近翼,分支比与ν有很大的关系.用对Na3PJ态共振激发的方法,也得到了精细结构转移截面,对结果进行了讨论.
Experimental ratios for branching into the fine‐structure levels of the Na 3p multiplet, as a consequence of an optical collision with He, Ne, Ar, Kr, or Xe, are reported. The process studied is Na(3s2S1/2) +RG+nhν → Na(3p2 Pj)+RG+(n−1)hν, where RG represents a rare gas atom and where the laser frequency ν is tuned in the wings of the Na resonance transitions. The branching ratios are defined as I(D1)/I(D2) where I(D1) and I(D2) are measured intensities of the atomic Na D1 and D2 lines. The ratios are determined for detunings ranging from about 650 cm−1 blue to 170 cm−1 red of the Na 3p multiplet. The branching is found to be strongly detuning dependent in the vicinity of the NaKr and NaXe near red‐wing satellites. The blue wing branching ratios show a detuning‐dependent approach to a recoil or sudden statistical limit of 0.5, irrespective of the rare gas.
构造了由多模复共轭虚相干态、多模复共轭虚相干态的相反态和多模复共轭相干态的线性叠加所组成的一种新型的三态叠加多模叠加态光场|Ψ(3)〉q.利用多模压缩态理论,研究了态|Ψ(3)〉q中广义电场分量的偶数次等幂次N次方Y压缩特性.结果发现:态|Ψ(3)〉q是一种典型的三态叠加多模非经典光场;当压缩次数N等于2P且P为2m′+1(m′=0,1,2,…,…)时,如果各模的初始相位φj(j=1,2,3,…,…,q)、态间的初始相位差(θ1-θ2)、(θ1-θ3)和(θ2-θ3),以及各单模相干态光场的总的平均光子数等分别满足各自的取值条件,则在这种情况下态|Ψ(3)〉q的广义电场分量可呈现出偶数次的广义非线性等幂次2(2m′+1)次方Y压缩效应.