Fluence-based and microdosimetric event-based methods for radiation protection in space [[electronic resource]]

• Record Nr.: UNINA9911006577203321
• Pubbl/distr/stampa: Bethesda, Md., : National Council on Radiation Protection and Measurements, 2001
• ISBN: 1-4294-9891-9; 1-60119-390-4
• Descrizione fisica: 1 online resource (120 p.)
• Collana: NCRP report ; ; no. 137
• Disciplina: 616.9/80214
• Soggetti: Extraterrestrial radiation - Safety measures; Radiation dosimetry; Microdosimetry; Manned space flight - Safety measures
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: "April 2001."; Prepared by the Scientific Committee 88 on Fluence as the Basis for a Radiation Protection System for Astronauts.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: ""Cover Page""; ""Preface""; ""Contents""; ""1. Summary""; ""2. Introduction""; ""2.1 The Radiation of Space""; ""2.2 Particle-Traversal Frequencies""; ""2.3 Microdosimetric-Event Frequencies""; ""2.4 Various Types of Radiation Field Descriptors and Their Relationship to Risk Estimation""; ""2.5 Variation of Risk with Other Quantities""; ""2.6 Content of this Report""; ""3. Conventional Method for Assessing Risk from the Mixed High and Low Linear Energy-Transfer Radiation Environment in Space""; ""3.1 Conventional Procedure""; ""3.2 Total Cancer Risk and Cancer Tissue Weighting Factors""; ""3.3 Radiation Transport and Risk Calculations""""3.4 Limitations of the Conventional System""; ""3.5 Applicability of the Conventional System""; ""4. Fluence-Based and Microdosimetric Event-Based Systems""; ""4.1 Fluence-Based Approach""; ""4.1.1 Introduction""; ""4.1.2 Idealized Application of the Fluence-Based System""; ""4.1.3 Relation to the Conventional System""; ""4.1.4 Low Linear Energy-Transfer Baseline Value of Risk Cross Section""; ""4.1.5 Treatment of Photons and Neutrons""; ""4.1.6 Strengths and Limitations""; ""4.2 The ; Microdosimetric Event-Based Approach""; ""4.2.1 Introduction""""4.2.2 Microdosimetric-Based Quality Functions""; ""4.2.3 Low Linear Energy-Transfer Baseline from the Hiroshima Data""; ""4.2.4 Strengths and Limitations""; ""5. Practical Aspects of Radiation Measurements""; ""5.1 Introduction""; ""5.2 The Conventional Approach""; ""5.2.1 Introduction""; ""5.2.2 Cavity Ion Dosimeters""; ""5.2.3 Thermoluminescent Dosimeters""; ""5.2.4 Solid-State Nuclear Track Detectors""; ""5.2.5 Current Practice""; ""5.3 The Fluence-Based Approach""; ""5.3.1 Introduction""; ""5.3.2 Charged-Particle Telescopes""; ""5.3.3 Bubble Detectors""; ""5.3.4 Neutron Recoil Spectrometers""""5.3.5 Solid-State Nuclear Track Detectors""; ""5.4 The Microdosimetric Event-Based Approach""; ""5.4.1 Introduction""; ""5.4.2 Lineal-Energy Spectrometers""; ""5.4.3 Variance Method for Measuring Dose-Mean Lineal Energy""; ""5.5 Comparison of the Practical Limitations to Implement Each Methodology""; ""6. The Biological Data Necessary""; ""6.1 Review of Available Data""; ""6.2 The Mouse Leukemia and the Rat Mammary Carcinoma Model Systems""; ""6.3 Experimental Design Considerations""; ""7. Implementation and Comparison of Methods""; ""7.1 Introduction""; ""7.2 Risk Assessment""""7.3 The Fluence-Based System""; ""7.4 The Microdosimetric Event-Based System""; ""7.5 Comparison of Fluence-Based and Microdosimetric Event-Based Systems""; ""7.6 Comparison of All Three Methods for a Given Space Radiation Scenario""; ""7.6.1 Introduction""; ""7.6.2 Conventional Method""; ""7.6.3 Risk Cross-Section Approach""; ""7.6.4 Microdosimetric Event-Based Approach""; ""7.6.5 Comparison of Risks""; ""8. Conclusions, Recommendations and Suggestions for Future Research""; ""8.1 Conclusions""; ""8.2 Recommendations""; ""8.3 Suggestions for Future Research""; ""Glossary""