Information about Cesium-137:


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

Cesium-137 is used to treat cancers...to measure correct patient dosages of radioactive pharmaceuticals... to measure and control the liquid flow in oil pipelines... to tell researchers whether oil wells are plugged by sand... and to ensure the right fill level for packages of food, drugs and other products. (The products in these packages do not become radioactive.)

Mass-Energy Data:

Atomic Mass:	136.907084	±	0.000003	amu
Excess Mass (Δ):	-86.551145	±	0.002985	MeV
Binding Energy:	1149.292932	±	0.002991	MeV
β^- Decay Energy:	1.175630	±	0.000172	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: 30.07 years ( 9.48408×10⁺⁰⁸ sec., λ = 7.30854×10^-10 s^-1)
Mode of decay:
β^-
to
137
56
Ba
(Q = 1.176 MeV)
Possible parent nuclides:
β^- from
137
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	30.17 y	7/2+	+2.8513(7)		[133Cs]	AB/D	PR 105 590 (57)
			+2.838(7)		[133Cs]	CFBLS	PL 79B 209 (78)
			+2.84(1)		[133Cs]	ABLS	NP A367 1 (81)
				+0.051(1) st		"OL, OD, R"	NP A248 157 (75)
				+0.06(2) st		CFBLS	PL 79B 209 (78)
				+0.03(4) 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.