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VI Reunião de Trabalho Física Nuclear.pdf - Sociedade Brasileira ...

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window to the process <strong>de</strong>picted in Fig. (3). Similarly the<br />

parity <strong>de</strong>pen<strong>de</strong>nt window can be attached to the diagram shown in<br />

Fig. (3c). This diagram does give rise to a (-) t term since<br />

BSI<br />

Fig. 3 - Ccntriliuting<br />

processes to snomalous<br />

scattering.<br />

16o<br />

i2<br />

c<br />

"s<br />

a)<br />

16o<br />

16o<br />

'es(<br />

a<br />

24<br />

Mg<br />

2°Ne 24Mg 20<br />

Si<br />

4<br />

a ;a<br />

28 ---- -- ----<br />

SI ,<br />

2°Ne<br />

it represents an effective elastic transfer process.<br />

We en<strong>de</strong>avour here to present a short account of how<br />

these diagrams generate t and E windows.<br />

-<br />

The T-matrixrepresenting the scattering in the<br />

elastic and a-transfer channels subspace may be given by<br />

-r =<br />

0<br />

(#1 .<br />

S2_ 7-<br />

. 0<br />

-(2 (*)<br />

' 24Mg<br />

21Ve<br />

c)<br />

where ? is diagonal and represents the "optical" E-18-type<br />

contribution,<br />

operator<br />

/<br />

o<br />

is the corresponding Muller distorting<br />

. 112<br />

b)<br />

(1)<br />

(2)

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