WWW Table of Radioactive Isotopes
 
 
 
121mSn
5071

Half life: 55 y 5  
E(level):6.30 8 keV
Jp:11/2-
Sn (keV): 6170.8 6
Sp (keV): 10758 40
Prod. mode: Fission product
Fast neutron activation
Thermal neutron activation
 
ENSDF citation:NDS 64,323 (1991)
Literature cut-off date: 1-Aug-1991
Author(s): T. Tamura, H. Iimura, K. Miyano and S. Ohya
References since cut-off: 121Sn decay from 1991-98 (NSR)
 
Decay properties:
 
ModeBranching (%)Q-value (keV)   References        
IT 77.6 20 78Hu07 
b- 22.4 20390.1 21 68Sn01  78Hu07  82Ha31 
 
Data sets:
 
Mode  Data set nameDisplay data
IT121SN IT DECAY (55 Y)
Tables:
ENSDF data:
Java applets:
b-121SN B- DECAY (55 Y)
Tables:  
ENSDF data:
Java applets:


	
Gammas from 121mSn (55 y 5)
Eg (keV)     Ig (%)    Decay mode

6.29 8  IT 
37.138 10  1.9  b- 

* Relative intensity

	

	
X-rays from 121mSn (55 y 5)
E (keV)    I (%)    Assignment

3,188   0.023 3   Sb Ll
3,437   0.0117 12   Sb Lh
3,595   0.064 7   Sb La2
3,605   0.58 6   Sb La1
3,844   0.36 4   Sb Lb1
3,886   0.038 8   Sb Lb4
3,933   0.062 12   Sb Lb3
3,980   0.0043 5   Sb Lb6
4,101   0.098 11   Sb Lb2
4,349   0.044 5   Sb Lg1
4,600   0.0089 19   Sb Lg2
4,600   0.014 3   Sb Lg3
25,793   0.000317 10   Sb Ka3
26,111   4.46 10   Sb Ka2
26,359   8.34 19   Sb Ka1
29,679   0.745 17   Sb Kb3
29,726   1.43 3   Sb Kb1
29,959   0.0125 5   Sb Kb5
30,393   0.404 9   Sb Kb2
30,460   0.062 3   Sb Kb4

	

	
Betas from 121mSn (55 y 5)
Eb endpoint (keV)    Ib (%)    Decay mode

359,27  5.0 b- 

	

Sort gammas by:   Eg,Ig   Ig,Eg   Decay mode,Eg

Sort alphas by:   Ea,Ia   Ia,Ea


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