Information about Tantalum-181:


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Mass-Energy Data:

Atomic Mass:	180.947996	±	0.000003	amu
Excess Mass (Δ):	-48.441085	±	0.002892	MeV
Binding Energy:	1452.238715	±	0.002903	MeV
β^- Decay Energy:	-0.187890	±	0.004549	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:

Atomic Percent Abundance: 99.988%
Spin: 7/2+
Stable Isotope
Possible parent nuclides:
β^- from
181
72
Hf

E.C. from
181
74
W

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	stable	7/2+	+2.3705(7)			N	JCP 59 3911 (73)/PR 120 1812 (60)
				+3.17(2) a		Pi-X	NP A403 572 (83)
				+3.28(6) a		Mu-X	NP A360 187 (81)
				+3.35(2) a		Pi-X	NP A355 383 (81)
				+3.35(11) a		Ka-X	NP A355 383 (81)
				3.4(2)		AB	ZP A298 159 (80)
				+3.30(6) a		Pi-X	NP A300 369 (78)
				3.18(3) a		Mu-X	NP A278 477 (77)
				3.44(6) a		Mu-X	PR C13 1644 (76)
6	6.05 ms	9/2-	+5.28(9)		[181Ta]	ME	PL 32B 364 (70/PRL 21 961 (68)
			+5.3(2)		[181Ta]	ME	ZP A288 369 (78)
				+3.71(7)	[181Ta]	ME	PL 93A 259 (83)
136	40 ps	9/2+	+2.6(7)		[182Ta]	IPAC	IzF 47 31 (83)
482	10.8 ns	5/2+	+3.29(3)			TDPAC/CDPAC	PL 1 126 (62)/NP 58 651 (64)
							NP 40 656 (63)
				+2.35(6)	[181Ta]	TDPAC	PL 97A 217 (83)
717	3.0 ps	15/2+	+2(2)			TF	ARJAERI 11 (96)
965	1.93 ps	17/2+	+4(2)			TF	ARJAERI 11 (96)
1239	1.12.ps	19/2+	+4(5)			TF	ARJAERI 11 (96)

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