Information about Iodine-138:


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Mass-Energy Data:

Atomic Mass:	137.922384	±	0.000085	amu
Excess Mass (Δ):	-72.299139	±	0.079194	MeV
Binding Energy:	1144.676956	±	0.079194	MeV
β^- Decay Energy:	7.820000	±	0.070000	MeV

"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra, Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.

Radioactive Decay Data:

Spin: (2-)
Half life: 6.49 s ( 6.49 sec., λ = 0.106802 s^-1)
Mode of decay:
β^-
to
138
54
Xe
(Q = 7.820 MeV)
Mode of decay: β^- +
1
0
n to
137
54
Xe
(Q = 2.010 MeV) Branch ratio: 5.50 %

R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)