20.500.12556/RUL-182655 Enhancing laser ablation inductively coupled plasma mass spectrometry analysis through empirical modeling of crater geometry Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) systems are engineered to produce uniform, flat-top beam profiles for optimal surface sampling. In practice, however, rounder beam profiles are prevalent. Their geometrical characteristics can be mathematically described using the two-dimensional super-Gaussian or even a Gaussian function for smaller beam sizes, with the super-Gaussian factor (n) serving as a quantifier. Since the beam profile and the ablation grid have a direct influence on the amount of sampled surface material, the idea is to reduce the ablation grid by sub-pixel mapping to improve the accuracy of surface scanning, increase pixel density, improve spatial resolution, and increase signal-to-noise ratio (SNR). This paper explores the relationship between super-Gaussian order (n), beam size, and laser fluence for circular beams, using two laser ablation systems with different wavelengths – 193 nm and 213 nm nanosecond lasers. An empirical model was developed to yield the factor n, facilitating the determination of the contraction factor (k). Identifying the precise contraction factor for each beam size brings the beam profile closer to a flat-top shape, producing smoother post-ablation surfaces and enhancing image quality due to heightened pixel density. Ultimately, such models improve our understanding of crater geometry optimization, leading to better analytical outcomes in LAICP-MS analysis. LA-ICP-MS mapping crater geometry modeling laser wavelength kemijska tehnologija laserska ablacija materiali analize žarki true false true Angleški jezik Slovenski jezik Članek v reviji 2026-05-20 10:56:53 2026-05-20 10:56:54 2026-05-21 04:57:13 0000-00-00 00:00:00 2025 0 0 7 str. art. 107305 Vol. 233 Nov. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66 1873-3565 10.1016/j.sab.2025.107305 249740035 1-s2.0-S0584854725001909-main.pdf 1-s2.0-S0584854725001909-main.pdf 1 DED167CF25AEE374A33DE82CA042BB54 507741be1f5830d1930d93ae82c999e1382410b25a0dbbabed29d47d4f913525 ef86c3a8-5429-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=234112 https://www.sciencedirect.com/science/article/pii/S0584854725001909 1 88501294-5429-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=234110 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0