137BA IT DECAY (2.552 M) 
Parent state: 661.659(3) keV
Half life: 2.552 M(1)
Q(gs): () keV
Branch ratio:        1.0
image 

Gamma ray: 
   Energy(keV)    Intensity(rel)
   661.657( 3)     89.90(14)
E. BROWNE, J. K. TULI, Nuclear Data Sheet 108,2173 (2007)

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