121SN B- DECAY (27.03 H)
Parent state: G.S.
Half life: 27.03 H(4)
Q(gs): 390.6(21) keV
Branch ratio:        1.0    
image

Beta ray: 

    Max.E(keV)    Avg.E(keV)     Intensity(rel)  Spin    3/2+
     390.6( -)    115.82(71)       100                   5/2+

S. OHYA, Nuclear Data Sheet 111, 1619 (2010)
121SN B- DECAY (43.9 Y)
Parent state: 6.30(8) keV
Half life: 43.9 Y(5)
Q(gs): 390.6(21) keV
Branch ratio:      0.224(20)
image

Beta ray: 

    Max.E(keV)    Avg.E(keV)     Intensity(rel)  Spin   11/2-
     359.8( -)    122.44(74)       100                   7/2+

Gamma ray: 
   Energy(keV)    Intensity(rel)
     37.15( 4)      8.26    

S. OHYA, Nuclear Data Sheet 111, 1619 (2010)

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