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Submitted on 1 Jan 1980
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DEPENDENCE OF LAUE REFLECTION OF MÖSSBAUER RADIATION OF MAGNETIC FIELD
DIRECTION IN 57FeBO3 SINGLE CRYSTAL
V. Labushkin, V. Sarkissyan, E. Smirnov
To cite this version:
V. Labushkin, V. Sarkissyan, E. Smirnov. DEPENDENCE OF LAUE REFLECTION OF MÖSS- BAUER RADIATION OF MAGNETIC FIELD DIRECTION IN 57FeBO3 SINGLE CRYSTAL.
Journal de Physique Colloques, 1980, 41 (C1), pp.C1-471-C1-472. �10.1051/jphyscol:19801185�. �jpa- 00219674�
JOURNAL DE PHYSIQUE Colloque C1, supplPment au n O 1, Tome 41, janvier 1980, page Cl-471
OEPEWENCE OF WE RE~ECTION OF MSSBAUER ~ I A T I O N OF MAGNETIC FIELD DIRECTION IN 5 7 ~ ~ ~ SINGLE 'CRYSTAL
V. G. Labushkin, V .A. Sarkissyan and E .V. Smirnov
~ Z Z - ~ n i o n Research Institute df Physico-~echnicaZ and ~adiotec&nicai! Measurements, Mosch, USSR.
The Mijssbauer spectrum of Laue-diff- -
ratted r a d i a t i o n from t h e (321) r e f l e c t i - N, Jd 4.4
'
, . . , . -
on was s t u d i e d - a s a function of the mag
-
, , :, .. 1.0
.
n e t i c f i e l d kpplied i n two ~ u t u -
, . .
a l l y perpendicular d i r e c t i o n s t o a s c a t
-
0.9-
. . - . ,
t e r i n g 57pesjj single c i i s t a ~ . f o r G o
, ,
t r a n s i t i o n s Am = I and h i = O ( ~ i g . i) and t h e . . .dependence .of the d i f s r a e t e d ra-
, , .
d i a t i o n . i n t e n s i t y . a s a f q c t i o n of t h e
pig. 2. - ~ependense of i n t e n s i t y magnetic f i e l d d i r e c t i o n a t t h e nuclei
.' . of $-quanta on- magnetic
ndar t h e resQneces (Fig. 21, f o r r - q u a -
, . . . , , . - , . . . ,
t a with various .fixed energy yaiues.
f i e i d d i r e c t i o n a t t h e nuclei 5 7 ~ e
The tuni,ng t o the &iffraction:
maxim
N
1I ! 1
was accomplished by. u t i l i z i n g the! b r e q s ia
I strahlung , of an X-ray tube. ,,It 9.m Be: de-
scrib.bd.
6s'
fdilows.The. crys%al i s irradia%ed by a 'beam of X-ray quanta possessin@; the continuous energy spectrumwEavbg s e t a'.radiation detector approximately-, a t t h e , double. Bragg
1
' I-7 - 6 - 5 - 4
- j
mm angle $9 o r -.a require.& ref laction, .we xot'ate5 t h e ' c r y s t a l and. d e t e c t o r t o superpose t h e .Fig.$. Dependence ,of i n t e n s i t y 0.f. diff.~acte.d r a d i a t i o n l i n e with t h e 14.4
d i f f r a c t e d t ~ s s b a u e r radi-
a t i o n on 'ener& i f ' \j-quanta ksV l i n e prelimisari-ly re.giste.re@, by .a.
multichannel pulse analyser using a, ;
57
..
C,Q source. In t h e -case of t h e s t r u c t u r a le:&hction of the. X-ray r a d i a t i o n d u e t o
Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:19801185
Cl-472 JOURNAL DE PHYSIQUE
t h e odd r e f l e c t i o n orders, t h e tuning i s performed using t h e second r e f l e c t i o n o r
double energy 28.8 keV 3
Fig. 3 . The amplitude s p e c t r a of dif- f r a c t e d X-ray r a d i a t i o n
The dependence of d i f f r a c t e d beam in- t e n s i t y on t h e magnetic f i e l d s t r e n g t h
(Fig. 2) i n t h e presence of high absorp
-
t i o n of resonant J-quanta can be explai
-
ned by t h e p o l a r i z a t i o n p r o p e r t i e s of the nuclear t r a n s i t i o n s responsible f o r t h e s c a t t e r i n g . The p r o p e r t i e s of t h e Am = i)
t r a n s i t i o n a r e such f o r f -quanta with
%(0)
= i t
p o l a r i z a t i o n t h e nucleaf s c a t t e r i n g amplitude i s t h e g r e a t e s t whe- r e a s f o r quanta whith $(O)=\~sP$olariaa-iza- t i o n t h e nuclear s c a t t e r i n g a w l i t u d e turn^ t o zero. T n the process t h e r a d i a t i - on with t h e 'i;2(0) p o l a r i z a t i o n does not i n t e r a c t with n u c l e i but experiences t h e R a y l e ~ g h s c a t t e r i n g on t h e e l e c t r o n s h e l l s of atoms. I n s c a t t e r i n g v i a t h e Am = 2 I nuclear t r a n s i t i o n t h e strong i n t e r a c t i o n with n u c l e i i s experienced, generally spe- aking, by r-quanta of any p o l a r i z a t i o n . The geometry of t h i s experiment, however, i s such t h a t t h e amplitude of t h e nuclear['Lq
p o l a r i z a t i o n than f o r t h e SI(21) =Li; [z%G]\
p o l a r i z a t i o n , I n ttais case one can assume only Y-quanta with t h ep o l a r i z a t i o n i n t e r a c t with n u c l e i whereas t h e r a d i a t i o n with t h e s2(21) p o l a r i z a t i - on i s s c a t t e r e d by electrons.
Thus, if energy of t h e
V
-radiation i s e ~ u a l ( o r almost) t o t h e energy of one of t h e MEssbauer t r a n s i t i o n s (a) o r ( 8 ) t h e quanta with t h e%
p o l a r i z a t i o n do not pass through t h e c r y s t a l due t o t h e high absorption.The corresponding s c a t t e r i n g amplitu- des take t h e from
where
jo
is t h e Rayleigh s c a t t e r i n g amp- l i t u d e without t h e p o l a r i z a t i o n f a c t o r3
-
taken i n t o consideration, and
6
and5
t h e stapdard ~ a y l e i g h p o l a r i z a t i o n s
It should be pointed out t h a t t h e de- pendence of t h e d i f f r a c t e d r a d i a t i o n i n
-
t e n s i t y on t h e magnetic f i e l d s t r e n g t h i s calculated numerically in a kinematic ap- proximation f o r t h e case of an i s o l a t e d nuclear resonance, i e
.
t h e i n t e r f e r e n c ebetween d i f f e r e n t nuclear t r a n s i t i o n s i s not taken i n t o accouat.
s c a t t e r i n g v i a t h e O m =
