LACAME 2006 : Proceedings of the 10th Latin American Conference on the Applications of the Mössbauer Effect, (LACAME 2006) Held in Rio De Janeiro City, Brazil, 5-9 November 2006

Proceedings of the 10th Latin American Conference on the Applications of the Mössbauer Effect, LACAME 2006, held in Rio de Janeiro City, Brazil, 5-9 November 2006. This volume demonstrates the way in which researchers, on a wide range of topics, many interdisciplinary, find the applications of the Mössbauer Effect an outstanding method whose results, sometimes unique, complements and improves the information obtained by other techniques to deepen the understanding of the matter under research. This volume comprises research papers recording original investigations on applications to diverse areas like archaeology, metallurgy, soil science, geology, industrial applications, new instrumentation, corrosion, and chemical applications. The papers present the latest scientific work of various regional investigators. Reprinted from Hyperfine Interactions (HYPE) Volume a2_title page.pdf 1 a4_Ed Board.pdf 2 a5 printed.pdf 3 a6-a7 toc.pdf 4 a8_Committee.pdf 6 A9_preface.pdf 7 Improving detector signal processing with pulse height analysis in Mössbauer spectrometers 8 Abstract 8 Introduction 8 Waveform peak detection and scintillation detectors 9 Transmission Mössbauer spectrometry with NaI:Tl and YAP:Ce scintillators 9 Conversion X-ray Mössbauer spectrometry with NaI:Tl detector 10 WPkD and gas-flow conversion electron detectors 11 Conclusion 14 References 15 Room... 16 Abstract 16 Introduction 16 Background 17 Experimental 17 Results and discussion 18 Conclusions 19 References 21 The metallurgic furnaces at the Curamba Inca site 22 Abstract 22 Introduction 22 Experimental procedures 23 Experimental conditions for MS and XRD measurements 24 Results and discussion 25 Conclusions 25 References 28 Study of the structural modifications in activated clays by Mössbauer spectroscopy and X-ray diffractometry 29 Abstract 29 Introduction 29 Experimental 30 Sample selection and acid activation treatment 30 Measuring conditions for MS and XRD 30 Results and discussion 31 Structural changes in clays due to activation 32 Conclusions 34 References 34 Magnetic and structural properties of mechanically alloyed Tb0.257−xNdxFe0.743 alloys, with x = 0 and 0.257 35 Abstract 35 Introduction 35 Experimental procedure 36 Results and discussion 36 Conclusions 39 References 40 Mössbauer and magnetic studies of parent material from argentine pampas soils 41 Abstract 41 Introduction 42 Experimental 42 Results and discussion 44 Conclusions 46 References 47 Multivariate analysis in provenance studies: Cerrillos obsidians case, Peru 48 Abstract 48 Introduction 48 Experimental 50 Results and discussion 50 Conclusion 52 References 53 Synthesis and characterization of Fe6W6C by mechanical alloying 54 Abstract 54 Introduction 54 Experimental procedure 55 Results and discussions 55 Conclusions 59 References 59 Iron-containing pyrochlores: structural and magnetic characterization 60 Abstract 60 Introduction 60 Experimental 61 Results and discussions 62 Conclusions 66 References 66 Study of the effect of Mn and Cu in Fe–Mn–Al–C–Cu alloys by ICEMS and XRD 67 Abstract 67 Introduction 67 Experimental 68 Results and discussion 69 XRD 69 Mössbauer 71 Conclusions 73 References 74 Mössbauer investigation of maghemite-based glycolic acid nanocomposite 75 Abstract 75 Introduction 76 Experimental 76 Results and discussion 78 Conclusions 79 References 79 Structural, Mössbauer and magnetic studies on Mn-substituted barium hexaferrites prepared by high energy ball milling 80 Abstract 80 Introduction 80 Experimental 81 Results and discussions 81 Conclusions 87 References 87 Provenance... 88 Abstract 88 Introduction 89 Sampling and experimental conditions 89 Results and discussion 90 Conclusion 92 References 92 Mössbauer investigation of magnetite nanoparticles incorporated in a mesoporous polymeric template 94 Abstract 94 Introduction 94 Experimental 95 Discussion 96 Conclusion 97 References 97 Distribution of Fe-bearing compounds in an Ultisol as determined with selective chemical dissolution and Mössbauer spectroscopy 98 Abstract 98 Introduction 99 Materials and methods 99 Soil collection and fraction separations 99 Mineralogical analysis 99 Chemical analyses and dissolutive methods 100 Results and discussion 100 Conclusions 103 References 103 Structural, magnetic and hyperfine characterization of zinc-substituted magnetites 105 Abstract 105 Introduction 105 Experimental details 106 Synthesis method 106 Characterization 106 Results and discussion 107 Conclusions 112 References 113 Magnetic investigation of iron-nitride-based magnetic fluid 114 Abstract 114 Introduction 114 Experimental 115 Discussion 117 Conclusion 121 References 121 Front Matter....Pages i-vii Improving detector signal processing with pulse height analysis in Mössbauer spectrometers....Pages 1-8 Room temperature 57 Fe Mössbauer spectroscopy of ordinary chondrites from the Atacama Desert (Chile): constraining the weathering processes on desert meteorites....Pages 9-14 The metallurgic furnaces at the Curamba Inca site (Peru): a study by Mössbauer spectroscopy and X-ray diffractometry....Pages 15-21 Study of the structural modifications in activated clays by Mössbauer spectroscopy and X-ray diffractometry....Pages 23-28 Magnetic and structural properties of mechanically alloyed Tb 0.257−x Nd x Fe 0.743 alloys, with x = 0 and 0.257....Pages 29-34 Mössbauer and magnetic studies of parent material from argentine pampas soils....Pages 35-41 Multivariate analysis in provenance studies: Cerrillos obsidians case, Peru....Pages 43-48 Synthesis and characterization of Fe 6 W 6 C by mechanical alloying....Pages 49-54 Iron-containing pyrochlores: structural and magnetic characterization....Pages 55-61 Study of the effect of Mn and Cu in Fe–Mn–Al–C–Cu alloys by ICEMS and XRD....Pages 63-70 Mössbauer investigation of maghemite-based glycolic acid nanocomposite....Pages 71-75 Structural, Mössbauer and magnetic studies on Mn-substituted barium hexaferrites prepared by high energy ball milling....Pages 77-84 Provenance study of obsidians from the archaeological site of La Maná (Ecuador) by electron spin resonance (ESR), SQUID magnetometry and 57 Fe Mössbauer spectroscopy....Pages 85-90 Mössbauer investigation of magnetite nanoparticles incorporated in a mesoporous polymeric template....Pages 91-94 Distribution of Fe-bearing compounds in an Ultisol as determined with selective chemical dissolution and Mössbauer spectroscopy....Pages 95-101 Structural, magnetic and hyperfine characterization of zinc-substituted magnetites....Pages 103-111 Magnetic investigation of iron-nitride-based magnetic fluid....Pages 113-120 Back Matter....Pages viii-ix This title presents proceedings of the 10th Latin American Conference on the Applications of the Mossbauer Effect (LACAME 2006) held in Rio de Janeiro City, Brazil, 5-9 November 2006. This volume demonstrates the way in which researchers, on a wide range of topics, many interdisciplinary, find the applications of the Mossbauer Effect an outstanding method whose results, sometimes unique, complements and improves the information obtained by other techniques to deepen the understanding of the matter under research. This volume comprises research papers recording original investigations on applications to diverse areas like archaeology, metallurgy, soil science, geology, industrial applications, new instrumentation, corrosion, and chemical applications. The papers present the latest scientific work of various regional investigators