Information about Europium-152:


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Mass-Energy Data:

Atomic Mass:	151.921740	±	0.000003	amu
Excess Mass (Δ):	-72.898338	±	0.002904	MeV
Binding Energy:	1250.451140	±	0.002912	MeV
β^- Decay Energy:	1.818758	±	0.001081	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: 3-
Half life: 13.537 years ( 4.26957×10⁺⁰⁸ sec., λ = 1.62346×10^-09 s^-1)
Mode of decay:
E.C.
to
152
62
Sm
(Q = 1.874 MeV) Branch ratio: 72.10 %
Mode of decay:
β^-
to
152
64
Gd
(Q = 1.819 MeV) Branch ratio: 27.90 %
Meta state at 0.045 Mev
Spin: 0- 13.537
Half life: 9.3116 h ( 33521.8 sec., λ = 2.06775×10^-05 s^-1)
Mode of decay:
β^-
to
152
64
Gd
(Q = 1.865 MeV) Branch ratio: 72.00 %
Mode of decay:
E.C.
to
152
62
Sm
(Q = 1.920 MeV) Branch ratio: 28.00 %
Meta state at 0.147 Mev
Spin: 8- 9.3116
Half life: 96 min ( 5760 sec., λ = 0.000120338 s^-1)
Mode of decay: γ (IT) (Q = 0.148 MeV)

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	13.54 y	3-	-1.9401(8)		[151Eu]	CFBLS	Cf93Bern 209(93)
			-1.950(12)		[151Eu]	CFBLS	YadF 44 1134 (86)
			-1.96(6)		[151Eu]	CFBLS	ZP A321 35 (85)
			-1.9414(13)		[151Eu]	"AB, O, R"	PR 129 1344(63)/PL 31B 295 (70)/
							ZP 245 411 (71)
				Q/Q(153Eu) = 1.1822(5)	[153Eu]	CFBLS	Cf93Bern 209(93)
				+2.71(3)	[151Eu]	CFBLS	YadF 44 1134 (86)
				+2.5(2)	[151Eu]	CFBLS	ZP A321 35 (85)

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