کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10716195 | 1027545 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Outer sub-shell photoabsorption cross-sections determined by X-ray photoelectron spectroscopy up to 14.5Â keV
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
 We determined sub-shell photoabsorption cross-sections between 5 and 14.5 keV for the 6s, 5d, 5p, 4f and 5s levels of Au by using the well-established cross-sections of C 1 s as the reference. Spectra were recorded with a commercially available hemispherical analyzer, which we equipped with a pre-retarding lens, allowing us to detect electrons with energies up to 14.5 keV. A comparison with existing relativistic central-field Hartree-Slater calculations reveals that most measured cross-sections are at least twice as large as the theoretical values. In particular, the 6 s derived conduction band electrons have a cross-section almost one order of magnitude larger than given by the (atomic) calculations, which suggests that this may be a solid state effect. These findings are beyond the error of our measurements, which is mostly determined by a lack of precise data for electron escape depths and exact values for the angular anisotropy of electron emission.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 547, Issue 1, 21 July 2005, Pages 73-86
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 547, Issue 1, 21 July 2005, Pages 73-86
نویسندگان
C. Kunz, S. Thiess, B. Cowie, T.-L. Lee, J. Zegenhagen,