Information about Cesium-129:


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

Mass-Energy Data:

Atomic Mass:	128.906063	±	0.000005	amu
Excess Mass (Δ):	-87.501395	±	0.004642	MeV
Binding Energy:	1085.672600	±	0.004645	MeV
β^- Decay Energy:	-2.431553	±	0.011326	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: 1/2+
Half life: 32.06 h ( 115416 sec., λ = 6.00564×10^-06 s^-1)
Mode of decay:
E.C.
to
129
54
Xe
(Q = 1.196 MeV)
Possible parent nuclides:
E.C. from
129
56
Ba

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	32.3 h	1/2+	+1.491(8)		[133Cs]	ABLS	NP A468 1 (87)
575	734 ns	11/2-	+6.55(10)			TDPAD	PR C18 2061 (78)

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