Ion Beam Analysis for Forensic Science - SPIRIT

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Ion Beam Induced Luminescence • Analogous to cathodoluminescence on SEM (CL) • Visible light emitted under ion impact • Yields chemical information : – Impurities – Structural defects – Valence states Malquvist et al: NIMB 109/110 (1996) 337-233 Courtesy of S. Calusi, INFN Firenze, Florence, Italy
Why Use Ion Beams in Forensics • Analysis does not destroy the samples • Very high sensitivity to trace elements • Fully quantitative and absolute • Analysis can take place in air or in vacuum • Can produce elemental maps on a sub micron scale • Most samples do not need any preparation treatments prior to analysis
Page 1 and 2: Ion Beam Analysis for Forensic Scie
Page 3 and 4: Contents • Why use IBA techniques
Page 5 and 6: Background : IBA in forensics Court
Page 7 and 8: What Do Forensic Analysts Need •
Page 9 and 10: Particle Induced X-ray Emission •
Page 11: Rutherford Backscattering Spectrome
Page 17 and 18: Uniqueness of GSR LGC Forensics (UK
Page 19 and 20: SEM-EDSEDS • Technique of choice
Page 21 and 22: SEM-EDS results K Cu S Fe •Small
Page 23 and 24: PIXE and EDX spectra 100000 Cu K Pb
Page 25 and 26: Accurate Quantification of GSR part
Page 29 and 30: Quartz Grain Texture Analysis Examp
Page 31 and 32: Can PIXE be used to identify differ
Page 33 and 34: How reproducible is the technique T
Page 35 and 36: Typical PIXE maps for Sample 3 “M
Page 37 and 38: Can we distinguish i i one source f
Page 41 and 42: PIXE in casework • The paper cont
Page 45 and 46: Example 4 : Fingerprint Analysis by
Page 47 and 48: Can We Detect Moisturiser i in Fing
Page 49 and 50: Fingerprint i Analysis Using MeV SI
Page 51 and 52: Conclusions • PIXE / PIGE / RBS /
Page 53: Thank you

Ion Beam Analysis for Forensic Science - SPIRIT

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