Information about Antimony-122:


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Mass-Energy Data:

Atomic Mass:	121.905175	±	0.000002	amu
Excess Mass (Δ):	-88.328519	±	0.002239	MeV
Binding Energy:	1033.129878	±	0.002245	MeV
β^- Decay Energy:	1.982545	±	0.001962	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: 2-
Half life: 2.7238 days ( 235336 sec., λ = 2.94535×10^-06 s^-1)
Mode of decay:
β^-
to
122
52
Te
(Q = 1.979 MeV) Branch ratio: 97.59 %
Mode of decay:
E.C.
to
122
50
Sn
(Q = 1.620 MeV) Branch ratio: 2.41 %
Meta state at 0.137 Mev
Spin: (5)+ 2.7238
Half life: 0.53 ms ( 0.00053 sec., λ = 1307.82 s^-1)
Mode of decay: γ (IT) (Q = 0.137 MeV)
Meta state at 0.164 Mev
Spin: (8)- 0.538
Half life: 4.191 min ( 251.46 sec., λ = 0.00275649 s^-1)
Mode of decay: γ (IT) (Q = 0.164 MeV)

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	2.68 d	2-	_1.90(2)		"[121,123Sb]"	NO/D	PR 112 935 (58)
				+0.85(11) st	[121Sb]	AB	PhMg 5 1309 (60)
				+0.9(2)	[121Sb]	NO/S	ZP A322 281 (85)
61	1.86 ms	3+	+2.983(12)			SOPAD	PR C7 2128 (73)
				+0.41(4) st	[121Sb]	TDPAD	PR C26 493 (82)
137	530 ms	5+	+3.05(10)			TDPAD	RRou 22 541 (75)

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