Information about Americium-243:


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Mass-Energy Data:

Atomic Mass:	243.061373	±	0.000002	amu
Excess Mass (Δ):	57.168280	±	0.002178	MeV
Binding Energy:	1829.839589	±	0.002203	MeV
β^- Decay Energy:	-0.008908	±	0.001434	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: 7370 years ( 2.3245×10⁺¹¹ sec., λ = 2.98192×10^-12 s^-1)
Mode of decay:
α
to
239
93
Np
(Q = 5.438 MeV)
Mode of decay: SF Branch ratio: 3.7E-9 %
Possible parent nuclides:
β^- from
243
94
Pu

E.C. from
243
96
Cm

α from
247
97
Bk

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	7370 y	5/2-	m/m(241Am) = 0.951(7)		[241Am]	ABLS	JRNC 143 93 (90)
			+1.50(1)			ABLS	JRNC 143 93 (90)
			+1.61(4)		[241Am]	O	PR 144 994 (66)/PR 102 1108 (56)
				Q/Q(241Am) = 0.909(2)	[241Am]	ABLS	Cf89Tash 131 (89)
				+2.86(3)		ABLS	JRNC 143 93 (90)
				+4.2(13)	[241Am]	O	PR 102 1108 (56)
84	2.3 ns	5/2+	+2.9(2)		[243Am]	ME	PL 115A 71 (86)
				4.1(12)	[243Am]	ME	PC73 Meeker (73)

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