钾离子3s光吸收光谱中的新窗口共振
New Window Resonances in the Potassium 3s Photoabsorption Spectrum
摘要：
用单色化同步辐射和光离子飞行时间法测量了钾原子在3s -> np激发区的光离子谱。发现了一个不寻常的具有成对窗口结构的谱，而不是一个简单的正则Rydberg级数。在Ar的3s -> np共振中没有观察到这样的辅助窗口，Ar具有封闭的外壳。基于Dirac-Fock计算，在36.7 eV和37.4 eV处的双窗口结构被指定为3s^{-1 $> 3 p ^{6} 4s 4p共振。用Fano公式拟合了谱线的形状，得到了谱线的Fano参数。
英文摘要：
The photoion spectrum of atomic potassium was measured over the 3s -> np excitation region with the photoion time-of-flight method and monochromatized synchrotron radiation. An unusual spectrum with paired windows structure was found instead of a simple regular Rydberg series. Such subsidiary windows have not been observed in the 3s -> np resonances of Ar, which has a closed outer shell. Based on Dirac-Fock calculations, the dual window structure at 36.7 eV and at 37.4 eV was assigned to the 3s^{-1}3p^{6}4s4p resonance. The line shape can be fitted by Fano's formula and the Fano parameters were obtained.
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