element

Information about Polonium-205:


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

Mass-Energy Data:

Atomic Mass:	204.981165	±	0.000032	amu
Excess Mass (Δ):	-17.544318	±	0.029437	MeV
Binding Energy:	1606.447808	±	0.029439	MeV
β^- Decay Energy:	-4.537266	±	0.042957	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: 1.66 h ( 5976 sec., λ = 0.000115988 s^-1)
Mode of decay:
E.C.
to
205
83
Bi
(Q = 3.530 MeV) Branch ratio: 99.96 %
Mode of decay:
α
to
201
82
Pb
(Q = 5.324 MeV) Branch ratio: 0.04 %
Possible parent nuclides:
E.C. from
205
85
At

α from
209
86
Rn

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	1.66 h	5/2-	+0.76(6)		[207Po]	NMR/ON	ZP A311 351 (83)
880	640 ms	13/2+	-0.95(5)			TDPAD	Cf74Upp 116 (74)

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