element

Information about Radium-216:


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

Mass-Energy Data:

Atomic Mass:	216.003518	±	0.000010	amu
Excess Mass (Δ):	3.277370	±	0.009144	MeV
Binding Energy:	1671.281257	±	0.009148	MeV
β^- Decay Energy:	-4.846438	±	0.028423	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: 182 ns ( 1.82×10⁺¹¹ sec., λ = 3.8085×10^-12 s^-1)
Mode of decay:
α
to
212
86
Rn
(Q = 9.526 MeV)
Mode of decay: E.C. to
216
87
Fr
(Q = 0.308 MeV) Branch ratio: <1.0E-8 %
Meta state at 1.507 Mev
Spin: 6+ 182
Half life: <0.2 ns ( 0 sec., λ = inf s^-1)
Mode of decay:
α
to
212
86
Rn
(Q = 11.034 MeV) Branch ratio: 0.58 %
Meta state at 1.711 Mev
Spin: 8+ <0.2
Half life: 1.42 ns ( 1.42×10⁺⁰⁹ sec., λ = 4.88132×10^-10 s^-1)
Mode of decay:
α
to
212
86
Rn
(Q = 11.237 MeV) Branch ratio: 1.86 %
Meta state at 2.026 Mev
Spin: 10+ 1.42
Half life: 0.6 ns ( 6×10⁺⁰⁸ sec., λ = 1.15525×10^-09 s^-1)
Mode of decay:
α
to
212
86
Rn
(Q = 11.552 MeV) Branch ratio: 0.12 %
Possible parent nuclides:
α from
220
90
Th

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
1508	0.5 ns	6+	g(avge) = 0.1(3)			TDPAD	HFI 59 165 (90)
1711	1.7 ns	8+	g(avge) = 0.1(3)			TDPAD	HFI 59 165 (90)
			+3(3)			IPAD	Cf83Meguro 155 (83)
2026	0.6 ns	10+	+1(3)			TDPAD	HFI 59 165 (90)
2679	0.8 ns	13-	-1(3)			TDPAD	HFI 59 165 (90)
3763	5.3 ns	19-	+9.3(10)			TDPAD	HFI 59 165 (90)
			+9.7(6)			TDPAD	NP A442 361 (85)
5170	6.6 ns	25-	+18(5)			TDPAD	HFI 59 165 (90)
		25-/24+	g = 0.63(6)			TDPAD	NP A442 361 (85)

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