Information about Iodine-128:


Wikipedia	Neutron Cross Sections	X-Ray Transitions	X-Ray Attenuation

Mass-Energy Data:

Atomic Mass:	127.905805	±	0.000004	amu
Excess Mass (Δ):	-87.741827	±	0.003691	MeV
Binding Energy:	1079.406416	±	0.003695	MeV
β^- Decay Energy:	2.118979	±	0.003829	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: 1+
Half life: 24.99 min ( 1499.4 sec., λ = 0.000462283 s^-1)
Mode of decay:
β^-
to
128
54
Xe
(Q = 2.119 MeV) Branch ratio: 93.10 %
Mode of decay:
E.C.
to
128
52
Te
(Q = 1.252 MeV) Branch ratio: 6.90 %

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)

Magnetic Dipole Moments and Electric Quadrupole Moments
Ex(kev)	T_1/2	Spin	m(nm)	Q(b)	Ref. Std.	Method	Reference
138	845 ns	4-	-0.72(3)			R	IzF 46 52 (82)

N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published. 2000 Courtesy of T. Burrows at BNL/NNDC.