Information about Cesium-135:


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Mass-Energy Data:

Atomic Mass:	134.905972	±	0.000003	amu
Excess Mass (Δ):	-87.586595	±	0.003115	MeV
Binding Energy:	1134.185737	±	0.003121	MeV
β^- Decay Energy:	0.269345	±	0.001195	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: 2300000 years ( 7.2542×10⁺¹³ sec., λ = 9.55512×10^-15 s^-1)
Mode of decay:
β^-
to
135
56
Ba
(Q = 0.269 MeV)
Meta state at 1.632 Mev
Spin: 19/2- 2300000
Half life: 53 min ( 3180 sec., λ = 0.000217971 s^-1)
Mode of decay: γ (IT) (Q = 1.633 MeV)
Possible parent nuclides:
β^- from
135
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	3x10*6 y	7/2+	+2.7324(2)		[133Cs]	AB/D	PR 105 590 (57)
			+2.73(1)		[133Cs]	ABLS	NP A367 1 (81)
				+0.050(2) st		"OL, OD, R"	NP A248 157 (75)
				+0.03(2) st		ABLS	NP A367 1 (81)
1633	53 m	19/2-	+2.18(1)		[133Cs]	ABLS	NP A367 1 (81)
				+0.89(7)		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.