Nucleon structure

NUCLEAR

INSTRUMENTS

AND

METHODS

33

ROBERT HOFSTADTER and LEONARD I. SCHIFF (editors), Nucleon Stnrctuve, Proceedings of the International Conference at Stanford University, June 24-27, 1963 (Stanford University Press, Stanford, California) 421 pp., $ 12.50. In his summary of the conference results A. Salam concluded, among other things, that nucleon structure seems to include the entire range of physics. Surely the contents of this book do very little to contradict him. The first 287 pages of the book reproduce the invited talks that were given during the conference, then follow one section of 23 contributed theoretical papers and one section of 18 contributed experimental papers. An excellent and amusing summary by A. Salam concludes the volume. In the very first invited talk G. F. Chew tries to answer the question: “What is the Nucleon?” and he suggests a “more accurate but less glamorous title” for this book: “S-Matrix Elements Involving the Nucleon”. The nucleon may be just another pole of the S-Matrix. The next several papers deal with electron scattering experiments and their interpretation and of course, this is very appropriate since this type of experiment has given outstanding contributions to the subject. Reviews are given of the Rosenbluth formula, of the theory for nucleon form factors and of the theory for electron-deuteron scattering and there are also reports from the experimental form factor work at the laboratories at Cornell, Cambridge (CEA), Stanford and Orsay. Strong interactions were treated in talks given by Fubini, Low, Lindenbaum and Cence, symmetry properties of particles by Isaev, Rosenfeld, Miller and Ne’eman, nucleon-nucleon interactions by Breit, Grishin and Palevsky, electromagnetic and weak interaction form factors by Tsai, Farley, Hughes and Wu and nucleon and antinucleon properties by Barashenkov and SandWeiss. No attempt has been made to reproduce the discussions, that followed each talk. It is unfortunate when the time delay between a conference and the publication of its proceedings is, as in this case, more than one year. For instance, most of the contributed papers have in the meantime been published elsewhere, often even including more recent results. The value of the present book, therefore, mainly lies in the invited papers. Since they are, as a rule, very thoroughly written and contain, for instance, in most cases extensive lists of references, the book can be warmly recommended to the reader who wants to follow recent progress in the study of nucleon structure. A. JOHANSSON

Exponential atrd Critical Experiments (Proceedings posium, Amsterdam, 2-6 September 1963), Vol. national Atomic Energy Agency, Vienna, 1964.

of a symI-III, Inter-

At the Symposium on Exponential and Critical Experiments organized by the IAEA in Amsterdam 1963 seventy-one papers were presented in nine sessions covering different aspects on

(1965)

180;

NORTH-HOLLAND

PUBLISHING

co.

reactor physics experiments. All the papers have afterwards been published in three volumes (I-111) each containing the material of three sessions. The general role of critical and exponential experiments was discussed in the first session. Review papers from several countries gave a good picture of experience gained as well as plans for the future. The pros and cons of exponential and critical assemblies respectively were discussed and some cost figures were also given. In the second session of fast assemblies, one may mention a paper about the theory of exponential experiments with fast neutrons. Subcritical Hz0 assemblies were treated in the third session where most of the contributions were from universities. Volume II is devoted to three sessions about water assemblies (Hz0 and/or D20). Amongst problems treated in this very informative volume we may mention pulsed neutron measurements, voideffects, neutron spectral distributions, and two-region experiments. The value of exponential and critical measurements was also discussed in a few papers. Volume III contains material from the last three sessions about a) graphite assemblies, b) rpecial techniques (theoretical and experimental) and c) organic-moderated and cooled assemblies. Several high-temperature experiments were presented in the graphite session. Amongst techniques presented the pulsedneutron and oscillation methods dominated. There are also three papers of the fourth session (in Vol. II) which should preferrably have been placed in the session on special techniques. The general conclusion drawn from the published material is that exponential and critical experiments will be important in reactor development work still for several years, though the measurements are gradually changing over to more sophisticated problems, e.g. non-uniform lattices, high temperatures, plutonium-bearing fuel. However, there is also a trend that some fundamental problems, notcloselyconnected with reactor projects, are taken over by educational institutions. R. PERSSON

International

Directory

of isotopes,

third

edition.

This is the latest edition of the wellknown catalogue of producers of isotopes, compiled by IAEA in Vienna. $9.00. The main chapters: “Radioisotopes” and “Compounds of selected radioisotopes” are revised and brought up-to-date. The part: “Compounds of selected radioisotopes” comprises compounds of Cl4, H3,1125,II31, P32, S35. Data given on the different radioisotopes and some of their compounds are mainly: Description and chemical form, supplier and code, specific activity, delivery remarks. In addition to these two chapters on radioisotopes this edition is enlarged with a chapter on stable isotopes from different suppliers. The last part of the directory is also new and deals with compounds of the stable isotopes C13, D2, N’s, 018. As distinguished from the earlier editions the price listings and some more detailed informations are omitted to avoid making the book unwieldy. E. JEANSSON