At-16

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⋅ [

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! 3

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!

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 + M 

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<

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(

− $

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=

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< $

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-(

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′=

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λ

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D



λ

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] [

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*

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D

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µ D7

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7)

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,

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=

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)

) = D"

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?

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(

!

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⋅ .(

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) 

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&

*

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(

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!

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(

6

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$ * $ $( $ ( * 3 + $ - $( * )

$

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7D µD

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9

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7) =

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!

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*"

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$

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-(- ) ≈ H

*

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$( *

($

:

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<

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-) =

7 µ

7

µ

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λ

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$ ⋅-

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'

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θ θ2

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3

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∑  

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<

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$

% / *$ ( !

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6 !3

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)=

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(

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:

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B"BC

& ξ:

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^

)} "

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,

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σ +

=



σ

(

)

: " B"CD 3( )

+     +    Γ   



(

)

(

+



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+



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)=D



:

)

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σ

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π

=

$

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))

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σ

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+

=

⋅ σ +

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=

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r ξ−

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!

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r r ∆ ξ = ∆ξ /

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r ξ−E

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(

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8

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ε 4

}=



(

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* 3 +

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(

χ

=

1 " B"C 2 " F$

J ( <

! !(

$

γ4

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$