Information about Tin-121:


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Mass-Energy Data:

Atomic Mass:	120.904237	±	0.000003	amu
Excess Mass (Δ):	-89.202770	±	0.002487	MeV
Binding Energy:	1026.715160	±	0.002493	MeV
β^- Decay Energy:	0.390131	±	0.002081	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: 3/2+
Half life: 27.06 h ( 97416 sec., λ = 7.11533×10^-06 s^-1)
Mode of decay:
β^-
to
121
51
Sb
(Q = 0.388 MeV)
Meta state at 0.006 Mev
Spin: 11/2- 27.06
Half life: 55 years ( 1.7347×10⁺⁰⁹ sec., λ = 3.99578×10^-10 s^-1)
Mode of decay: γ (IT) (Q = 0.006 MeV) Branch ratio: 77.60 %
Mode of decay:
β^-
to
121
51
Sb
(Q = 0.394 MeV) Branch ratio: 22.40 %
Possible parent nuclides:
β^- from
121
49
In

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	27.1 h	3/2+	+0.6978(10)		"[115,7,9Sn]"	ABLRFS	PR C34 1052 (86)
				-0.02(2)		ABLRFS	PR C34 1052 (86)
6.3	55 y	11/2-	-1.3877(9)		[119Sn]	ABLRFS	PR C34 1052 (86)
				-0.14(3)		ABLRFS	PR C34 1052 (86)

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