Information about Iodine-123:


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Iodine-123 is widely used to diagnose thyroid disorders.

Mass-Energy Data:

Atomic Mass:	122.905598	±	0.000004	amu
Excess Mass (Δ):	-87.934936	±	0.003627	MeV
Binding Energy:	1039.242911	±	0.003631	MeV
β^- Decay Energy:	-2.676000	±	0.015000	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: 5/2+
Half life: 13.27 h ( 47772 sec., λ = 1.45095×10^-05 s^-1)
Mode of decay:
E.C.
to
123
52
Te
(Q = 1.242 MeV)
Possible parent nuclides:
E.C. from
123
54
Xe

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
0	13.3 h	5/2+	2.818(7)		[131I]	NMR/ON	NP A323 1 (79)
2660	29 ns	21/2+	+10.9(9)			TDPAD	Cf83Gron NP14 (83)

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