Information about Europium-149:


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

Mass-Energy Data:

Atomic Mass:	148.917926	±	0.000005	amu
Excess Mass (Δ):	-76.451500	±	0.004708	MeV
Binding Energy:	1229.790334	±	0.004713	MeV
β^- Decay Energy:	-1.313877	±	0.004190	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: 5/2+
Half life: 93.1 days ( 8.04384×10⁺⁰⁶ sec., λ = 8.61712×10^-08 s^-1)
Mode of decay:
E.C.
to
149
62
Sm
(Q = 0.692 MeV)
Possible parent nuclides:
E.C. from
149
64
Gd

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	93.1 d	5/2+	+3.576(10)		[151 Eu]	CFBLS	YadF 44 1134 (86)
			+3.565(6)		[151 Eu]	CFBLS	ZP A321 35 (85)
			2.5(5)			NO/S	HFI 15 73 (83)
				+0.70(8)	[151 Eu]	CFBLS	YadF 44 1134 (86)
				+0.75(2)	[151 Eu]	CFBLS	ZP A321 35 (85)
497	2.43 ms	11/2-	+7.0(3)		[19F 197]	TDPAD	NP A350 61 (80)

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