element

Information about Dysprosium-149:


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

Mass-Energy Data:

Atomic Mass:	148.927334	±	0.000012	amu
Excess Mass (Δ):	-67.687950	±	0.011088	MeV
Binding Energy:	1218.679724	±	0.011090	MeV
β^- Decay Energy:	-6.013690	±	0.018570	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: (7/2-)
Half life: 4.20 min ( 252 sec., λ = 0.00275058 s^-1)
Mode of decay:
E.C.
to
149
65
Tb
(Q = 3.812 MeV)
Meta state at 2.661 Mev
Spin: 27/2-) 4.20
Half life: 0.490 s ( 0.49 sec., λ = 1.41459 s^-1)
Mode of decay: γ (IT) (Q = 2.661 MeV) Branch ratio: 99.30 %
Mode of decay:
E.C.
to
149
65
Tb
(Q = 6.473 MeV) Branch ratio: 0.70 %
Possible parent nuclides:
E.C. from
149
67
Ho

α from
153
68
Er

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	4.23 m	7/2-	-0.119(7)		[163Dy]	CFBLS	PC Neugart (87)
				-0.62(5)	[163Dy]	CFBLS	PC Neugart (87)

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