mm

20 downloads 0 Views 254KB Size Report
We investigate the backscattering for converging beams in iron-doped lithium ... agates nearly along the +c axis of the crystal to re- ... to be negative, if the focal point is between the lens ... It is positive, if ... The intensity distribution of the incident laser spot on screen S1 .... top of the sample, the beam follows a thin straight.

 

      

             £

 ¦¥    ¨¢£      ©§ª

  ¤¡   !" 











  

              !       "#  $%  & '   (    )* +  %   $%    ! '       * ,   

#!$ %& '())* %++,

+    -     - '   )! ! %' -   . %  

          -  &-  '  

 /%%     '       %   !  - ' %!    %' . 0% -  

'      1 !  

) %' !  %     ' !.

         

" (" ( -  .$/* -"$$  ")/ (#- 0 "- 1#//" /#") 2"# #-" 2"# 2*)/#")# $ 23/#")# 2)2)"-4 5#)*-"/ /- $-2/*- -") 2")0)#"! 2)2)"-

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

" $-"#  - #)-$ 0)") " ( ()7" -2#7/-  '4% 4 5 -/) )-/"- ) /- ("$ (* - -2/ $  /-  ."  ? C+ ) ,+4 ") #("- 0 /-$ -2/- $ " 2)$# "- -># (" /* )-/"  -2#7/-4 9 )$) " !)0* .") " )") );#"$ ( 0 '4%$ -  2- ##* -0" - /-- " +4=34 - . 7. (/7 "- - .// - $ 0#"- 0 " #)*-"/- #" - -#"") #")- 0) / )2# -#"")4 9 $$" -// -#/ ;#" "- 0 " 2"/#")# 2)")- 0 " #)*-"//- 2/* " )/ 0 -#"") #")-4 ') 12/

-// -#/ -2"/ !)" 0 " 2" /!# " -) - #-$)$ -  7* 2)") 0) /" $#$ (#7.)$ -#"")   #" /" ("4   ( - 0#-$ "  ( :' #)*-"/ / " B 1- " -2"/ !)"- 0 " 2" /!# "-) )-/"  -// -#/ -"#-"# )0)#"! $1 $/"- .# #" - )$ -#"") #")- 0 (#7-#"")4 5 "" .7/* -#"")$ ()"$ 0) " -#"") #")- .// ( 2/6$ (* ". .! #2/ 0 " #$" ( $ " "" -#"")$ (-4 5- )-/"-  (#7-#" ") -2#7/-4 9 ) 12)"/ #$" " 2" ( 2)2"- / " B $)#" .# 2/- "" " /#/ )-2- #-$ (* " $0 0- 6/$ 2/*-  $#-! )/4 5- - ""  

 



  ' ?    $                 

") #$" 0) " ")-" - " -3 0 " -2/4 ) -2/ 2)!$- /)) 2/6# "4 5)0)  ")-" "7- 2/#  " - 2/- "" ) " -Æ#"/* "#74 ') 12/ - 2/ # " )-/"  " ")-"  ) 12) "4 5- 7$ 0 2- #