element

Information about Terbium-149:


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

Mass-Energy Data:

Atomic Mass:	148.923242	±	0.000005	amu
Excess Mass (Δ):	-71.499950	±	0.004791	MeV
Binding Energy:	1223.274077	±	0.004795	MeV
β^- Decay Energy:	-3.812000	±	0.010000	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: 4.118 h ( 14824.8 sec., λ = 4.67559×10^-05 s^-1)
Mode of decay:
E.C.
to
149
64
Gd
(Q = 3.636 MeV) Branch ratio: 83.30 %
Mode of decay:
α
to
145
63
Eu
(Q = 4.077 MeV) Branch ratio: 16.70 %
Meta state at 0.036 Mev
Spin: 11/2- 4.118
Half life: 4.16 min ( 249.6 sec., λ = 0.00277703 s^-1)
Mode of decay:
E.C.
to
149
64
Gd
(Q = 3.672 MeV) Branch ratio: 99.98 %
Mode of decay:
α
to
145
63
Eu
(Q = 4.113 MeV) Branch ratio: 0.02 %
Possible parent nuclides:
E.C. from
149
66
Dy

α from
153
67
Ho

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	4.12 h	1/2+	+1.35(2)		[159Tb]	CFBLS	ZP A337 367 (90)
2518	3.5 ns	(27/2)+	4.9(12) b			IPAD	JPJa 59 66 (90)
			+6(3)		[159Tb]	IPAD	ARINST 26 (87)

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