element

Information about Francium-212:


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

Mass-Energy Data:

Atomic Mass:	211.996195	±	0.000028	amu
Excess Mass (Δ):	-3.544346	±	0.025771	MeV
Binding Energy:	1646.600035	±	0.025773	MeV
β^- Decay Energy:	-3.342670	±	0.029038	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+
Half life: 20.0 min ( 1200 sec., λ = 0.000577623 s^-1)
Mode of decay:
E.C.
to
212
86
Rn
(Q = 5.117 MeV) Branch ratio: 57.00 %
Mode of decay:
α
to
208
85
At
(Q = 6.529 MeV) Branch ratio: 43.00 %
Possible parent nuclides:
α from
216
89
Ac

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	19.3 m	5+	+4.62(9)		[211Fr]	CFBLS	EPL 3 175 (87)
			+4.62(9)		[211Fr]	ABLS	PL 163B 66 (85)
				-0.10(1) st		ABLS	PL 163B 66 (85)
1551	27 ms	11+	9.89(4)			SOPAD	HFI 3 297 (77)
2492	604 ns	(15-)	+15.65(12)			TDPAD	PL B217 38 (89)
			15.60(15)			TDPAD	NP A448 137 (86)
				0.84(13)	[213Fr 2538]	TDPAD	NP A516 145 (90)
				-0.80(12)	[213Fr 2538]	LEMS	PR C43 514 (91)
4834	4.2 ns	22+	22(4)			TDPAD	NP A448 137 (86)
5854	312 ns	(27-)	21.9(3)			TDPAD	NP A448 137 (86)
				1.7(3)	[213Fr 2538]	TDPAD	NP A516 145 (90)
				-1.5(3)	[213Fr 2538]	LEMS	PR C43 514 (91)

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