, , , - . , . . , , . "" .
"" ' (. 5.4):
( + I)0 - , ( + I)1 - .
( + I)0 ( + I)1. 0 1 ³ 1(∆E) , , .
. .
, (. 5.5). - , , .
( + I)1, 1 - . ( + I)2, , ( + I)1.
. , 1 - ∆E . - 2 - 1
5.3 "-'"
"-' (. 5.6). , , . , , "-".
, .
1 = S, , .
, 1 = S ' . : + I = .