Marie Curie: The Radio-Active Substances

Marie Curie: The Radio-Active Substances
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"The object of the present work is the publication of researches which I have been carrying on for more than four years on radio-active bodies. I began these researches by a study of the phosphorescence of uranium, discovered by M. Becquerel. The results to which I was led by this work promised to afford so interesting a field that Pierre Curie put aside the work on which he was engaged, and joined me, our object being the extraction of new radio-active substances and the further study of their properties."

Оглавление

Marie Curie. Marie Curie: The Radio-Active Substances

Marie Curie: The Radio-Active Substances

Table of Contents

Introduction

Historical

Chapter I. Radio-activity of Uranium and Thorium. Radio-active Minerals

Measurement of the Intensity of Radiation

Radio-activity of the Compounds of Uranium and Thorium

Is Atomic Radio-activity a general Phenomenon?

Radio-active Minerals

Chapter II. Method of Research

Polonium, Radium, Actinium

Spectrum of Radium

Extraction of the New Radio-active Substances

Polonium

Preparation of the Pure Chloride of Radium

Determination of the Atomic Weight of Radium

Characteristics of the Radium Salts

Fractionation of Ordinary Barium Chloride

Chapter III. Radiation of the New Radio-active Substances

Methods of Investigation of the Radiation

Energy of Radiation

Complex Nature of the Radiation

Action of the Magnetic Field

Deflected β-Rays

Charge of the Deflected Rays

Action of the Electric Field upon the Deflected β-Rays of Radium

Relation of the Charge to the Mass for a Particle Negatively Charged Emitted by Radium

Action of the Magnetic Field upon the α-Rays

Action of the Magnetic Field on the Rays of other Radio-active Substances

Proportion of β-Rays in the Radiation of Radium

Penetrating Power of the Radiation of Radio-active Bodies

Ionising Action of Radium Rays on Insulating Liquids

Various Effects and Applications of the Ionising Action of the Rays Emitted by Radio-active Substances

Fluorescent and Luminous Effects

Evolution of Heat by the Salts of Radium

Chemical Effects produced by the New Radio-active Bodies

Physiological Effects

Influence of Temperature upon Radiation

Chapter IV. Communication of Radio-activity to Substances Initially Inactive

Activity Induced in an Enclosed Space

Part played by Gases in the Phenomena of Induced Radio-activity

Dissipation in Free Air of the Induced Activity of Solid Bodies

Dissipation of Activity in a Confined Space. Velocity of Destruction of the Emanation

Variation of Activity of Liquids rendered Active and of Radium Solutions

Theory of Radio-activity

Another Form of Induced Radio-activity

Induced Radio-activity with Slow Dissipation

Radio-activity Induced upon Substances in Solution with Radium

Dissemination of Radio-active Particles and Induced Radio-activity of the Laboratory

Activity Induced Outside the Influence of Radio-active Substances

Variations of Activity of Radio-active Bodies. Effects of Solution

Variations of the Activity of Radium Salts on Heating

Theory of Interpretation of the Causes of Variations of Activity of Radium Salts after Solution and after Heating

Nature and Cause of the Phenomena of Radio-activity

Conclusions

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Marie Curie

Published by

.....

Penetrating Power of the Radiation of Radio-active Bodies.

Ionising Action of Radium Rays on Insulating Liquids.

.....

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