Information about Gadolinium-155:


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Mass-Energy Data:

Atomic Mass:	154.922619	±	0.000003	amu
Excess Mass (Δ):	-72.080112	±	0.002949	MeV
Binding Energy:	1273.064530	±	0.002956	MeV
β^- Decay Energy:	-0.821215	±	0.011878	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: 14.80%
Spin: 3/2-
Stable Isotope
Meta state at 0.121 Mev
Spin: 11/2-
Half life: 31.97 ms ( 0.03197 sec., λ = 21.6812 s^-1)
Mode of decay: γ (IT) (Q = 0.121 MeV)
Possible parent nuclides:
β^- from
155
63
Eu

E.C. from
155
65
Tb

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	3/2-	-0.2572(4)			ENDOR	JP C11 203 (78)
			-0.2591(5)			AB/D	JP B2 122 (69)
				+1.27(5) st		ABLS	PR A42 1416 (90)
				1.27(3) a		Mu-X	PR C27 1772 (83)
				+1.30(2) a		"Mu-X, AB"	PL 108B 8 (82)/JP B2 122 (69)
60	0.19 ns	5/2-		-0.44(2) a		Mu-X	PR C27 1772 (83)
87	6.35 ns	5/2+	-0.525(2)		[155Gd]	ME	HFI 5 479 (78)
			-0.518(5)		[155Gd]	ME	Phca 92B 52 (77)
			-0.533(4)		[155Gd]	ME	PL 43B 380 (73)
				+0.13(3)	[155Gd]	ME	HFI 5 479 (78)
				+0.111(7)	[155Gd]	ME	Phca 92B 52 (77)
				+0.113(8)	[155Gd]	ME	PL 43B 380 (73)
105	1.18 ns	3/2+	+0.143(5)		[155Gd]	ME	HFI 5 479 (78)
				+0.96(3)	[155Gd]	ME	HFI 5 479 (78)
				+1.30(4)	[155Gd]	ME	NP A233 385 (74)

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