Influence of chemical effects on Al high-resolution Ka X-ray spectra in proton and alpha particle induced X-ray spectra

Fazinić, Stjepko; Božičević Mihalić, Iva; Mioković, Anja; Rodriguez Ramos, Mauricio; Petrić, Marko (2023) Influence of chemical effects on Al high-resolution Ka X-ray spectra in proton and alpha particle induced X-ray spectra. Journal of Analytical Atomic Spectrometry, 38 (10). pp. 2179-2187. ISSN 0267-9477

PDF - Accepted Version - article Download (798kB)

Abstract

Ka X-ray emission induced by 2 MeV protons and 3 MeV He ions in thick pelletized Al metal, Al2O3, Al2S3, AlN, AlPO4 was measured using a wavelength-dispersive spectrometer with a flat diffraction crystal to study the chemical sensitivity of related X-ray spectra. The energy shifts and relative intensities of KaL1 multiple ionization satellites were determined for proton excitation. For He excitation we were able to study KaL1, KaL2 and KaL3 multiple ionization satellite components of Al Ka spectra. Intensity ratios of two major KaL1 components (Ka3 and Ka4) were determined for both 2 MeV proton and 3 MeV He excitations. Relative intensities of Ka diagram lines (KaL0) and KaL1, KaL2 and KaL3 multiple ionization satellites were determined for 3 MeV He excitation. The energy shifts of Ka1,2 and multiple ionization satellite (MIS) peaks were determined using the spectra obtained from the Al and Al compounds mixed with MgBr, where Br La and Lb peaks were used as internal calibration standards. The results confirm statistically relevant energy shifts for Al Ka1,2 X-ray peaks from the measured compounds. The Al Ka1,2 energy shifts show a linear decrease with the increase of the calculated effective charge on Al atoms. Similar linear dependances of the peak energy shift vs. the effective charge on Al atoms have been observed on KaL1 multiple ionization satellite components Ka′ and Ka4 measured by 3 MeV He excitation. The work reported here demonstrates the importance of studying chemical effects of the Ka X-ray band for low-Z elements and suggests future directions for the construction of an extensive and accurate database of diagram lines and related multiple ionization satellites for proton and He ion excitation in the MeV energy range.

Item Type:	Article
Uncontrolled Keywords:	ion beam analysis; PIXE; wavelength-dispersive X-ray spectrometry; chemical effects
Subjects:	NATURAL SCIENCES > Physics > Nuclear Physics NATURAL SCIENCES > Physics > Atomic and Molecular Physics
Divisions:	Division of Experimental Physics
Projects:	Project title Project leader Project code Project type Visoko razlučiva spektrometrija x-zraka fokusiranim ionskim snopovima-Hi-REXS Stjepko Fazinić; Dony Domagoj Cosic; Marin Vukšić; Domagoj Mudronja; Vladan Desnica; John Campbell IP-2019-04-9429 HRZZ
Depositing User:	Stjepko Fazinić
Date Deposited:	16 Jan 2025 14:21
URI:	http://fulir.irb.hr/id/eprint/9437
DOI:	10.1039/d3ja00178d

Actions (login required)

View Item