Information about Barium-131:


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Mass-Energy Data:

Atomic Mass:	130.906931	±	0.000007	amu
Excess Mass (Δ):	-86.693390	±	0.006887	MeV
Binding Energy:	1100.224888	±	0.006889	MeV
β^- Decay Energy:	-2.960000	±	0.100000	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: 11.50 days ( 993600 sec., λ = 6.97612×10^-07 s^-1)
Mode of decay:
E.C.
to
131
55
Cs
(Q = 1.370 MeV)
Meta state at 0.187 Mev
Spin: 9/2- 11.50
Half life: 14.6 min ( 876 sec., λ = 0.000791264 s^-1)
Mode of decay: γ (IT) (Q = 0.187 MeV)
Possible parent nuclides:
E.C. from
131
57
La

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	11.8 d	1/2+	0.708113(15)		[137Ba]	TIS	EPL 4 1361 (87)/JPCo 42 339 (81)
			-0.71(2)		"[135,137Ba]"	"ABLRFS, R"	NP A403 234 (83)/ZP A291 219 (79)
188	14.6 m	9/2-	-0.87(2)		"[135,137Ba]"	CFBLS	NP A403 234 (83)
				+1.46(13) st	"[135,137Ba]"	CFBLS	NP A403 234 (83)

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