Application Note
Strategies to monitor and mitigate sample damage during atomic resolution STEM-EELS spectrum imaging
April 1, 2025
Strontium
Element density: 2.63 g/cm3
Electron configuration: [Kr]5s2
Oxidation states: +2
Edges
Explore electron energy loss spectroscopy (EELS) reference spectra, featuring major and minor edges used for elemental identification and chemical state analysis in materials research.
Major edges | |||
|---|---|---|---|
K | 16105 |
|  |
L2 | 2007 |  |  |
L3 | 1940 | | |
M4 | 135 |
| |
M5 | 133 |
| |
N2,3 | 20 |  | |
Minor edges | |||
|---|---|---|---|
L1 | 2216 |
| |
M1 | 358 |
|  |
M2 | 280 |  |  |
M3 | 269 | | |
N1 | 38 |
| |
Considerations
M4,5-edges at low energy and delayed. L-edges typically give high SNR for mapping.
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Related spectral data
SrO on holey C film (0 – 170 eV)
Material analyzed: SrO
Related elements: Strontium, Oxygen
Data contributor: Gatan
Beam energy (keV): 200
Nominal energy range (eV): 0 – 170
Collection semi-angle effective (mrad): 100
Notes: Serial EELS; originally SrCO3 particles, reduced to SrO by irradiation; 7 sweeps 16.67 ms dwell
SrO on holey C film (0 – 920 eV)
Material analyzed: SrO
Related elements: Strontium, Oxygen
Data contributor: Gatan
Beam energy (keV): 200
Nominal energy range (eV): 0 – 920
Collection semi-angle effective (mrad): 100
Notes: Serial EELS; originally SrCO3 particles, reduced to SrO by irradiation; zero-loss peak intensity = 6.82e8; total elastic int. / zero-loss int. = 0.94; gain change factor = 633; 20 ms dwell; 40 sweeps
SrO on holey C film (1820 – 2840 eV)
Material analyzed: SrO
Related elements: Strontium, Oxygen
Data contributor: Gatan
Beam energy (keV): 120
Nominal energy range (eV): 1820 – 2840
Collection semi-angle effective (mrad): 21
Notes: Serial EELS; originally SrCO3 particles, reduced to SrO by irradiation; total elastic int. / zero-loss int. = 0.2
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