Information about Tellurium-138:


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Mass-Energy Data:

Atomic Mass:	137.929220	±	0.000220	amu #
Excess Mass (Δ):	-65.931000	±	0.205000	MeV #
Binding Energy:	1139.091000	±	0.205000	MeV #
β^- Decay Energy:	6.368000	±	0.220000	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: 0+
Half life: 1.4 s ( 1.4 sec., λ = 0.495105 s^-1)
Mode of decay: β^- to
138
53
I
(Q = 6.370 MeV)
Mode of decay: β^- +
1
0
n to
137
53
I
(Q = 2.500 MeV) Branch ratio: 6.30 %

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)