Lathdavong Lemthong, Westberg Jonas, Shao Jie, Dion Claude M, Kluczynski Pawel, Lundqvist Stefan, Axner Ove
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden.
Appl Opt. 2010 Oct 10;49(29):5597-613. doi: 10.1364/AO.49.005597.
We give a simple two-transition model of Faraday modulation spectrometry (FAMOS) addressing the electronic X(2)Π(ν('') = 0) - A(2)Σ(+)(ν(') = 0) band in nitric oxide. The model is given in terms of the integrated line strength, S, and first Fourier coefficients for the magnetic-field-modulated dispersive line shape function. Although the two states addressed respond differently to the magnetic field (they adhere to the dissimilar Hund coupling cases), it is shown that the technique shares some properties with FAMOS when rotational-vibrational Q-transitions are targeted: the line shapes have a similar form and the signal strength has an analogous magnetic field and pressure dependence. The differences are that the maximum signal appears for larger magnetic field amplitudes and pressures, ∼1500 G and ∼200 Torr, respectively.
我们给出了一个简单的双跃迁模型，用于研究法拉第调制光谱法（FAMOS），该模型针对一氧化氮中的电子X(2)Π(ν('') = 0) - A(2)Σ(+)(ν(') = 0)能带。该模型是根据积分线强度S以及磁场调制色散线形状函数的一阶傅里叶系数给出的。尽管所涉及的两个态对磁场的响应不同（它们遵循不同的洪德耦合情况），但结果表明，当针对转动 - 振动Q跃迁时，该技术与FAMOS具有一些共同特性：线形状具有相似的形式，并且信号强度具有类似的磁场和压力依赖性。不同之处在于，最大信号分别出现在更大的磁场幅度和压力下，约为1500 G和约200 Torr。
