Information about Terbium-154:


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Mass-Energy Data:

Atomic Mass:	153.924686	±	0.000054	amu
Excess Mass (Δ):	-70.154308	±	0.050087	MeV
Binding Energy:	1262.285050	±	0.050087	MeV
β^- Decay Energy:	0.246091	±	0.050679	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: 0
Half life: 21.5 h ( 77400 sec., λ = 8.95539×10^-06 s^-1)
Mode of decay:
E.C.
to
154
64
Gd
(Q = 3.560 MeV)
Mode of decay: β^- to
154
66
Dy
(Q = 0.250 MeV) Branch ratio: <0.10 %
Meta state at 0.000 Mev
Spin: 3- 21.5
Half life: 9.4 h ( 33840 sec., λ = 2.04831×10^-05 s^-1)
Mode of decay:
E.C.
to
154
64
Gd
(Q = 3.560 MeV) Branch ratio: 78.20 %
Mode of decay: γ (IT) Branch ratio: 21.80 %
Mode of decay: β^- to
154
66
Dy
(Q = 0.250 MeV) Branch ratio: <0.10 %
Meta state at 0.000 Mev
Spin: 7- 9.4
Half life: 22.7 h ( 81720 sec., λ = 8.48198×10^-06 s^-1)
Mode of decay:
E.C.
to
154
64
Gd
(Q = 3.560 MeV) Branch ratio: 98.20 %
Mode of decay: γ (IT) Branch ratio: 1.80 %

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 + x	9.4 h	3-	+1.6(2)		[159Tb]	CFBLS	ZP A337 367 (90)
			1.8(4)		[159Tb]	NO/S	JP G9 213 (83)
				+2.9(15)	[159Tb]	NO/S	JP G9 213 (83)
0 + y	22.7 h	7-	0.9(3)		[est]	NO/S	JP G9 213 (83)

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