204TL B- DECAY 
Parent state: G.S.
Half life: 3.783 Y(12)
Q(gs): 763.76(18) keV
Branch ratio:     0.9708( 7)
 image 

Beta ray: 

    Max.E(keV)    Avg.E(keV)     Intensity(rel)  Spin      2-
     763.4( 2)    244.05( 6)       100                     0+
C.J. CHIARA and F.G. KONDEV, Nuclear Data Sheet 111,141 (2010)

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