Antimony-134m

Properties and data of the isotope ¹³⁴Sb.

Content

General data

Name of the isotope:Antimony-134m; Sb-134mSymbol:¹³⁴Sb or 13451SbMass number A:134 (= number of nucleons)Atomic number Z:51 (= number of protons)Neutrons N:83Isotopic mass:133.9205357(18) u (atomic weight of Antimony-134m)
Excitation energy: 279(1) keVNuclide mass:133.8925598 u (calculated nuclear mass without electrons)Mass excess:-74.02052 MeVMass defect:1.19772896 u (per nucleus)Nuclear binding energy:1115.67733987 MeV (per nucleus)
8.3259503 MeV (average binding energy per nucleon)Half-life:10.07(5) sDecay constant λ:0.068832887841107 s^-1Specific activity α:3.116701852446 × 10⁺²⁰ Bq g^-1
8423518520.1254 Ci g^-1Spin and parity:
(nuclear angular momentum)(7-)

Radioactive Decay

Half-life T_½ = 10.07(5) s respectively 1.007 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹³⁴Te	99.922 %
β^-, n	¹³³Te	0.088(4) %

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
¹³⁴Sb		0.78(6) s	(0-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 83) and isobaric (same nucleon number A = 134) with Antimony-134m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 83	Isobar A = 134
46	¹²⁹Pd
47	¹³⁰Ag
48	¹³¹Cd	¹³⁴Cd
49	¹³²In	¹³⁴In
50	¹³³Sn	¹³⁴Sn
51	¹³⁴Sb	¹³⁴Sb
52	¹³⁵Te	¹³⁴Te
53	¹³⁶I	¹³⁴I
54	¹³⁷Xe	¹³⁴Xe
55	¹³⁸Cs	¹³⁴Cs
56	¹³⁹Ba	¹³⁴Ba
57	¹⁴⁰La	¹³⁴La
58	¹⁴¹Ce	¹³⁴Ce
59	¹⁴²Pr	¹³⁴Pr
60	¹⁴³Nd	¹³⁴Nd
61	¹⁴⁴Pm	¹³⁴Pm
62	¹⁴⁵Sm	¹³⁴Sm
63	¹⁴⁶Eu	¹³⁴Eu
64	¹⁴⁷Gd	¹³⁴Gd
65	¹⁴⁸Tb
66	¹⁴⁹Dy
67	¹⁵⁰Ho
68	¹⁵¹Er
69	¹⁵²Tm
70	¹⁵³Yb
71	¹⁵⁴Lu
72	¹⁵⁵Hf
73	¹⁵⁶Ta
74	¹⁵⁷W