Radioactive Substances and Their Radiations (Classic Reprint) - Tapa blanda

Excerpt from Radioactive Substances and Their Radiations

A collected account of radio-active phenomena entitled Radio activity. This was followed a year later by a revised and enlarged edition. In the seven years that have elapsed since the latter publication there has been a steady and rapid growth of our knowledge of the properties of the radiations from active sub stances, and of the remarkable series of transformations that occur in them. In the present work I have endeavoured to give an accurate and concise account of the whole subject as it stands to-day within the compass of a Single volume. A few pages from the earlier book have been utilised, but, otherwise, the present.

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PREFAOE IN 1904 I published through the Cambridge University Press a collected account of radio-active phenomena entitled Radioactivity: This was followed a year later by a revised and enlarged edition. In the seven years that have elapsed since the latter publication there has been a steady and rapid growth of our knowledge of the properties of the radiations from active substances, and of the remarkable series of transformations that occur in them. In the present work I have endeavoured to give in accurate and concise account of the whole subject as it stands to-day within the compass of a single volume. A few pages from the earlier book have been utilised, but, otherwise, the present volume is an entirely new work. It is of interest to signalise some of the main directions of advance since the publication of the second edition of my Radioactivity. There has been a very great increase in the amount and accuracy of our knowledge of the radiations from active substances

Table of Contents

TABLE OF CONTENTS; Radio-active Substances; Ionisation of Gases; ]!ethods of ]deasurement; The Alpha Rays ; The Beta Rays; The Gamma or Very Penetrating Rays; Properties of the Radiations; Continuous Production' and Decay of Radio-active ]!atter; Radio-active Gases; Active Deposits; Theory of Successive Transformations; Uranium, Ionium, and the Origin of Radium; Radium and its Emanation; Active Deposit of Radium ,; Actinium and its Products; Thorium and its Products; Production of Helium and Emission of Heat; General Results and Relations; Radio-activity of the Earth and Atmosphere; Appendix A Comparison of quantities of Radium and; PAGE; 1; 26; 87; 114; 193; 257; 296; 329; 347; 391; 410; 444; 469; 486; 519; 1)34; 553; 587; 624; International Radium Standard 657; Appendix B The Tracks of Ionising Particles in Gases;; Counting o