A Nanosecond Laser-Induced Breakdown Spectroscopy for Forensic Science Application

Daricha Guluma

dc.contributor.author	Daricha Guluma
dc.date.accessioned	2022-09-23T07:39:53Z
dc.date.available	2022-09-23T07:39:53Z
dc.date.issued	2022-05
dc.identifier.uri	http://ir.bdu.edu.et/handle/123456789/14277
dc.description.abstract	Laser-Induced Breakdown Spectroscopy (LIBS) is an analytical technique for classification and quntification of target materials. It uses different optics, target holder, vacuum chamber and Charge Coupled Device (CCD)/ICCD camera to take the fingureprint of the target material. When a laser is focused onto a target material, it emits a plasma radiation that comprises of electrons, neutral and ionic emission at different time scale. So, in this project work the literature review supported by NIST spectral analysis is used toquantify forensic science for the analysis of trace evidences collected from the scene of occurrence was expl ained using LIBS analytical technique.This work focus on the materials like DNA, alloys of elemen ts, Gunshoot Residue (GSR), glass, paint, soil, fingerprint, counterfeit currency,variation in the man ufacture of chemical composition and allows considerable discrimination even with very small remains emission spectra. The main parameters of plasmas radiation are electron density and electron temperature from the quantified spectra in the papers. Then, using this analytical parameter, the NIST spectra are plotted to show the fingerprints of the materials to be analyzed for forensic purpose. Finally, analytical prob lem facing for a forensic expert and techniques employed to challenge them and the future perspecti ves of the technique are presented	en_US
dc.language.iso	en_US	en_US
dc.subject	Physics	en_US
dc.title	A Nanosecond Laser-Induced Breakdown Spectroscopy for Forensic Science Application	en_US
dc.type	Thesis	en_US