Antimony-136

Properties and data of the isotope ¹³⁶Sb.

Contents

See also: List of individual Antimony isotopes (and general data sources).

General data

Name of the isotope:Antimony-136; Sb-136Symbol:¹³⁶Sb or 13651SbMass number A:136 (= number of nucleons)Atomic number Z:51 (= number of protons)Neutrons N:85Isotopic mass:135.930749(6) u (atomic weight of Antimony-136)Nuclide mass:135.9027731 u (calculated nuclear mass without electrons)Mass excess:-64.50689 MeVMass defect:1.204845492 u (per nucleus)Nuclear binding energy:1122.30634673 MeV (per nucleus)
8.25225255 MeV (average binding energy per nucleon)Separation energy:S_N = 2.888(6) MeV (first neutron)
S_P = 11.164(7) MeV (first proton)Half-life:923(14) msDecay constant λ:0.75097202660882 s^-1Specific activity α:3.34996987119 × 10⁺²¹ Bq g^-1
90539726248.459 Ci g^-1Spin and parity:
(nuclear angular momentum)(1-)Year of discovery:1976

Radioactive Decay

Half-life T_½ = 923(14) ms respectively 9.23 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	¹³⁶Te	81.5 %	9.95 MeV
β^-, n	¹³⁵Te	18.5(18) %	5.31 MeV
β^-, 2n	¹³⁴Te	< 1 %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 85) and isobaric (same nucleon number A = 136) with Antimony-136. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 85	Isobar A = 136
47	¹³²Ag
48	¹³³Cd
49	¹³⁴In	¹³⁶In
50	¹³⁵Sn	¹³⁶Sn
51	¹³⁶Sb	¹³⁶Sb
52	¹³⁷Te	¹³⁶Te
53	¹³⁸I	¹³⁶I
54	¹³⁹Xe	¹³⁶Xe
55	¹⁴⁰Cs	¹³⁶Cs
56	¹⁴¹Ba	¹³⁶Ba
57	¹⁴²La	¹³⁶La
58	¹⁴³Ce	¹³⁶Ce
59	¹⁴⁴Pr	¹³⁶Pr
60	¹⁴⁵Nd	¹³⁶Nd
61	¹⁴⁶Pm	¹³⁶Pm
62	¹⁴⁷Sm	¹³⁶Sm
63	¹⁴⁸Eu	¹³⁶Eu
64	¹⁴⁹Gd	¹³⁶Gd
65	¹⁵⁰Tb	¹³⁶Tb
66	¹⁵¹Dy
67	¹⁵²Ho
68	¹⁵³Er
69	¹⁵⁴Tm
70	¹⁵⁵Yb
71	¹⁵⁶Lu
72	¹⁵⁷Hf
73	¹⁵⁸Ta
74	¹⁵⁹W
75	¹⁶⁰Re
76	¹⁶¹Os