Chinese Physics C > 2004, Vol. 28 > Issue(10): 1121-1125

Determination of the Photoabsorption Cross-Sections of Al and Fe Films in the Soft X-Ray Region Using Synchrotron Radiation

Institute of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
Photoabsorption cross sections at the Al and Fe L _2,3edges on thin films have been measured at the Beijing Synchrotron Radiation Facility (BSRF) using monochromatic soft X-ray radiation. The measured Fe and Al cross sections are in good agreement with theoretical predictions for energy below the edge, while a poor agreement is observed near the edge region probably because the independent atom approximation is not suitable for photon energy near the absorption edge. Experimental data have been also compared with previous data available in the literature. This work demonstrates that cross section determinations of thin films of low Z atoms in the transmission mode are difficult but are feasible and can be substantially improved using synchrotron radiation.

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ZHENG Lei, CUI Ming-Qi, ZHU Jie and ZHAO Yi-Dong. Determination of the Photoabsorption Cross-Sections of Al and Fe Films in the Soft X-Ray Region Using Synchrotron Radiation[J]. Chinese Physics C, 2004, 28(10): 1121-1125.

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Received: 2003-09-11
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Determination of the Photoabsorption Cross-Sections of Al and Fe Films in the Soft X-Ray Region Using Synchrotron Radiation

Corresponding author:CUI Ming-Qi,

Institute of High Energy Physics,CAS,Beijing 100039,China

Received Date:2003-09-11
Accepted Date:1900-01-01
Available Online:2004-10-05

Abstract:Photoabsorption cross sections at the Al and Fe L_2,3edges on thin films have been measured at the Beijing Synchrotron Radiation Facility (BSRF) using monochromatic soft X-ray radiation. The measured Fe and Al cross sections are in good agreement with theoretical predictions for energy below the edge, while a poor agreement is observed near the edge region probably because the independent atom approximation is not suitable for photon energy near the absorption edge. Experimental data have been also compared with previous data available in the literature. This work demonstrates that cross section determinations of thin films of low Z atoms in the transmission mode are difficult but are feasible and can be substantially improved using synchrotron radiation.