Complete sets of the series are available to school and public librarians, and to teachers who can make them available for reference or for use by groups. Requests should be made on school or library letterheads and indicate the proposed use.
Students and teachers who need other material on specific aspects of nuclear science, or references to other reading material, may also write to the Oak Ridge address. Requests should state the topic of interest exactly, and the use intended.
In all requests, include “Zip Code” in return address.
Printed in the United States of America
USAEC Division of Technical Information Extension, Oak Ridge, Tennessee
FOOTNOTES
[1]The early dangers from use of X rays, due to incomplete understanding and inadequate shielding, have now been eliminated.
[2]Gamma rays are high-energy electromagnetic radiation.
[3]Alpha particles are large positively charged particles, identical to helium nuclei. For definitions of unfamiliar words see Nuclear Terms, A Brief Glossary, a companion booklet in this series.
[4]For detailed descriptions of these waves and particles, see Our Atomic World, a companion booklet in this series.
[5]An equivalent statement is that nuclei of isotopes have the same number of protons but different numbers of neutrons.