Neutron diffraction by GE Bacon

622
Book Reviews
Works intended for notice in this column should be sent direct to the Editor (A. J. C. Wilson, Department of Physics, University College, Cathays Park, Cardiff, Great Britain). A s far as practicable books will be reviewed in a country different
from that of publication.
Neutron diffraction.
P a r G. E. B A c o n .
O x f o r d : C l a r e n d o n Press, 1962.
P p . 426.
I1 s ' a g i t d:une seconde ddition de l'ouvrage paru en 1955.
Cette nouvelle @dition a cent pages de plus que la pr4c4d e n t e e t e s t divis4e, comme elle, en deux parties sensiblemerit 6gales.
L a premibre est une exposition des principes et des
techniques gTn@rales de la diffraction des neutrons. Les
p r i n c i p a u x ehapitres out pour sujet: la diffusion des
neutrons p a r les atomes, leur diffraction p a r les cristaux,
la diffusion magn4tique et les techniques expdrimentales.
Cette partie se termine p a r un chapitre n o u v e a u sur la
diffusion in41astique d e n t le d4veloppement a 6t6 consid@rable depuis 1955.
L a seconde partie du livre a 6t4 remani4e d a v a n t a g e .
Le hombre des publications est m a i n t e n a n t si g r a n d
qu'fl ne p o u v a i t plus etre question pour l ' a u t e u r de les
analyser toutes. I1 s:est done attach@ i~ donner plus de
place aux 6tudes qui 4clairent le mieux les principes fond a m e n t a u x de la diffraction des neutrons. Les premiers
sujets traitds s e n t la localisation des atomes 14gers, la
distinction entre atomes de nombres atomiques voisins
et deux domaines qui n'Ttaient pas abord4s darts la
premibre 6dition: l:@tude des structures moldculaires et
la diffraction p a r des corps non cristallins.
Darts ces ehapitres, comme darts la premibre p a t t i e du
livre, l ' a u t e u r a eu le souci de comparer point p a r p o i n t
la diffraction des n e u t r o n s /~ celle des r a y o n s X et de
dTgager leurs limites respectives. Cela rend l'utilisation
de co livre agr@able a u x lecteurs habitu4s a u x techniques
de la diffraction des r a y o n s X.
Une p a r t essentielle est 6videmment faite darts cette
seconde partie a u x 6tudes faites sur les milieux magnTtiques. Cet expos@ fair done le point des 6tudes faites
jusqu'~ m a i n t e n a n t darts le domaine de la diffraction des
n e u t r o n s et il f a u t signaler enfin que les tr@s nombreuses
r@f@rences cit4es au tours de Fouvrage contribuent largemerit k le rendre utile.
J. PETIAIJ
Laboratoire de mingralogie-cristallographie
Sorbonne
1 rue Victor.Cousin
Paris Ve
France
Plasticity
of crystals.
E d i t e d b y M. V. KLASS~.~'-
~EKLYUDOVA. Pp. 196. T r a n s l a t i o n f r o m t h e R u s sian. N e w Y o r k : C o n s u l t a n t s B u r e a u , 1962. P r i c e
$12.50.
This little book contains a n introduction b y t h e editor
followed b y five reviews b y R u s s i a n workers of problems
in the plasticity of crystals. The i n t r o d u c t i o n gives a short
historical account of the progress of t h i s b r a n c h of physics
in Russia, a n d t h e suggestion is m a d e t h a t t h e relatively
slow development of this field in R u s s i a in the 1940's
a n d 1950's was due to the e x t r a o r d i n a r y progress a n d
prospects of nuclear physics. There is no doubt t h a t m u c h
of the original m o m e n t u m gained in the 1920's a n d 1930:s
b y R u s s i a n pioneers, such as Ioffe, Frenkel, Obreimova,
R e b i n d e r a n d others, was lost during this period. D u r i n g
recent years there has again been a n increasing interest in
this field in Russia, a n d t h e articles in this volume give
examples of some of the more recent work, in particular
in the Laboratory of the Mechanical Properties of Crystals
of the I n s t i t u t e of Crystallography during 1957-58.
The contribution b y V. R. Regel is a review of t h e
t e m p e r a t u r e a n d strain-rate dependence of t h e flow stress
a n d work h a r d e n i n g characteristics of single crystals, a n d
contains m a n y useful references to R u s s i a n work in this
field. The n e x t two articles b y A. A. U r u s o v s k a y a review
the experimental d a t a on X - r a y asterism, and inhomogeneities of plastically deformed crystals, such as k i n k
bands, etc. There has been considerable interest in Russia
in this aspect of plasticity.
I n the n e x t contribution V. L. I n d e n b o m gives a
review of dislocation theory, including an account of the
t h e o r y of continuous distributions. The final article is
a n account of t h e structure a n d properties of grain
boundaries b y V. F. Minskov.
This volume, in the original Russian, m u s t be of particular value to R u s s i a n workers in this field, as it reviews
so m a n y topics which are n o t covered otherwise in this
language. To n o n - R u s s i a n scientists its m a i n value lies
in the numerous references to R u s s i a n work, which h a v e
been m a d e so readily accessible in this way.
P. B. Hlxse~r
Cavendish Laboratory
Cambridge
England