- Genie2000, Canberra (2000)
2.3.5 Ti so tiet dien dong phan
Trong qua trinh kich boat, cac dong vi tao thanh co the ton tai hai trang thai do la trang thai niia ben va trang thai ca ban. Tii trang thai nira ben co mot
xac suai p nao do chuyen ve trang thai co ban. Khi xac dinh suat Igng phan ling chiing ta can tinh den xac suat p chuyen tir trang thai niia ben ve trang
thai ca ban dua vao ti so tiet dien dong phan xac dinh theo cong thiic sau:
X-l. \ -X_lr x^(1 -ê-'')e-^-'»{\-e-'-'-) f^ /v;,f /;-" f;; ?ii\-e-''')e-''''{\-e-''') C Ạ Ạ. - A . Ạ + P Ạ. - A . (2.31)
Trong do: G^, G^ la tiet dien tao thanh trang thai nua ben va trang thai CO ban; X^, X^ hang só phan ra ciia trang thai niJra ben va trang thai co ban; p la
ti so phan nhanh tir trang thai nira ben ve trang thai co ban; yv),"' va Á),)]' dien tich dinh háp thu toan phan ciia biic xa gamma dac trng 6 trang thai niia ben
va trang thai co ban; /;"" va /;"" la hieu suat phat, ^^^ va é;;' hieu suat ghi
ciia dinh hap thu toan phan ciia biic xa gamma dac trung 6 trang thai nira ben
va trang thai co ban; l„ t,,, t,, la thoi gian kich hoat, thoi gian phoi, thoi gian do
mau;
Con C doc xac dinh theo cong thuc sau:
c=c:c:c:/c^c!:c^
Trong do: C",C",C" • la he so hieu chinh sir tu hap thu tia gamma trong mau, hieu chinh sir cong xung va thofi gian chet 6 trang thai niia ben; Cf,.C^.c;',: la
he so hieu chinh sir tir hap thu tia gamma trong mau, hieu chinh cong xung va
CHironVG 3. NGHIEN ClTU PHAN BO CUA BlTC XA HAM VA NOTRON TREN MAY GIA TOC ELECTRON