Absolute optical oscillator strengths for the electronic excitation of atoms at high resolution. III. The photoabsorption of argon, krypton, and xenon.
Absolute optical oscillator strengths for the electronic excitation of atoms at high resolution. III. The photoabsorption of argon, krypton, and xenon.
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DOI：
10.1103/physreva.46.149
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发表时间：
1992-07
期刊：
影响因子：
--
通讯作者：
W. Chan;G. Cooper;X. Guo;G. Burton;C. E. Brion
中科院分区：
文献类型：
--
作者：
W. Chan;G. Cooper;X. Guo;G. Burton;C. E. Brion
测量了氩、氪和氙在离散和连续区域中光吸收的绝对振荡器强度。在可能的情况下将结果与先前发表的实验和理论数据进行比较。目前的工作是最近报道的氦测量的延续 [Chan 等人，Phys. Rev. A 44, 186 (1991)] 和氖灯 [Chan et al., Phys. Rev. A 45, 1420 (1992)] 使用偶极 (e,e) 方法在低分辨率和高分辨率下获得。使用低分辨率偶极子（e，e）光谱仪[半峰全宽（FWHM）约为1 eV]，获得了氩、氪和氙的价态和内壳层的绝对光吸收振荡器强度光谱，等效光子能量分别为500、380和398 eV。采用高分辨率偶极子 (e,e) 光谱仪（半高宽为 0.048 eV）来获得从基态到 ${\mathit{ms}}^{2}$${\mathit{mp}}^{5}$ns 的离散电子跃迁的绝对光吸收振荡器强度，并且 ${\mathit{ms}}^{2}$${\mathit{mp}}^{5}$nd ${(}^{2}$${\mathit{P}}_{3/2,1/2}$) 流形，其中对于氩、氪和氙，m 分别为 3、4 和 5。使用最近报道的 Samson 和 Yin 的绝对光学数据，通过 Bethe-Born 转换的电子能量损失谱的单点连续归一化获得绝对光学振荡器强度尺度 [J.选择。苏克。是。 B 6, 2326 (1989)] 对于氩、氪和氙原子。在对应于氩、氪和氙的内价电子激发的自电离共振的能量区域中也获得了高分辨率绝对光吸收振荡器强度。
Absolute oscillator strengths for the photoabsorption of argon, krypton, and xenon in both the discrete and continuum regions have been measured. The results are compared where possible with previously published experimental and theoretical data. The present work is a continuation of recently reported measurements for helium [Chan et al., Phys. Rev. A 44, 186 (1991)] and neon [Chan et al., Phys. Rev. A 45, 1420 (1992)] obtained using the dipole (e,e) method at both low and high resolution. Using the low-resolution dipole (e,e) spectrometer [with a full width at half maximum (FWHM) of about 1 eV], absolute photoabsorption oscillator strength spectra for the valence and inner shells of argon, krypton, and xenon were obtained up to equivalent photon energies of 500, 380, and 398 eV, respectively. The high-resolution dipole (e,e) spectrometer (FWHM of 0.048 eV) was employed to obtain absolute photoabsorption oscillator strengths for the discrete electronic transitions from the ground states to the ${\mathit{ms}}^{2}$${\mathit{mp}}^{5}$ns and ${\mathit{ms}}^{2}$${\mathit{mp}}^{5}$nd ${(}^{2}$${\mathit{P}}_{3/2,1/2}$) manifolds where m=3, 4, and 5 for argon, krypton, and xenon, respectively. The absolute optical oscillator strength scales were obtained by single-point continuum normalization of the Bethe-Born converted electron-energy-loss spectra using the recently reported absolute optical data of Samson and Yin [J. Opt. Soc. Am. B 6, 2326 (1989)] for argon, krypton, and xenon atoms. High-resolution absolute photoabsorption oscillator strengths were also obtained in the energy regions of the autoionizing resonances corresponding to excitation of the inner-valence s electrons of argon, krypton, and xenon.