Information about Cesium-139:


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

Mass-Energy Data:

Atomic Mass:	138.913358	±	0.000005	amu
Excess Mass (Δ):	-80.706565	±	0.004316	MeV
Binding Energy:	1159.590998	±	0.004320	MeV
β^- Decay Energy:	4.212716	±	0.003122	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: 7/2+
Half life: 9.27 min ( 556.2 sec., λ = 0.00124622 s^-1)
Mode of decay:
β^-
to
139
56
Ba
(Q = 4.213 MeV)
Possible parent nuclides:
β^- from
139
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	9.4 m	7/2+	+2.696(4)		[133Cs]	CFBLS	ZP A289 227 (79)
			+2.70(1)		[133Cs]	ABLS	NP A367 1 (81)
			+2.70(3)		[133Cs]	AB	PS 19 516 (79)
				-0.075(11) st		CFBLS	ZP A289 227 (79)
				-0.06(3) st		ABLS	NP A367 1 (81)

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