Information about Xenon-129:


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

Mass-Energy Data:

Atomic Mass:	128.904779	±	0.000001	amu
Excess Mass (Δ):	-88.697350	±	0.000813	MeV
Binding Energy:	1087.650909	±	0.000832	MeV
β^- Decay Energy:	-1.195955	±	0.004592	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: 26.4%
Spin: 1/2+
Stable Isotope
Meta state at 0.236 Mev
Spin: 11/2-
Half life: 8.88 days ( 767232 sec., λ = 9.03439×10^-07 s^-1)
Mode of decay: γ (IT) (Q = 0.236 MeV)
Possible parent nuclides:
β^- from
129
53
I

E.C. from
129
55
Cs

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	1/2+	-0.777976(8)		[2H]	N	HPAc 41 367 (68)
40	0.98 ns	3/2+	+0.58(8)		[129Xe]	ME	JPCo 35 C6-301 (74)
				-0.41(4)	[131Xe]	ME	PR 135 B1102 (64)
236	8.89 d	11/2-	-0.8906(12) d		[129Xe]	CFBLS	PC Neugart (90)
			-0.891223(4)		[131Xe 164]	"N/OP, NO/S"	PR C34 1974 (86)/ZP 267 145 (74)
			0.8911(5)		[133Xe]	NMR/ON	ZP A326 255 (87)
				+0.64(2)	[131Xe]	CFBLS	PC Neugart (90)

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