Antimony-112

Properties and data of the isotope ¹¹²Sb.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Antimony-112; Sb-112Symbol:¹¹²Sb or 11251SbMass number A:112 (= number of nucleons)Atomic number Z:51 (= number of protons)Neutrons N:61Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.1960784313725 (= neutron-proton ratio)Neutron excess (N-Z):10Isotopic mass:111.912400(19) u (atomic weight of Antimony-112)Nuclide mass:111.8844241 u (calculated nuclear mass without electrons)Mass excess:-81.59887 MeVMass defect:1.015236508 u (per nucleus)Nuclear binding energy:945.68671578 MeV (per nucleus)
8.44363139 MeV (average binding energy per nucleon)Separation energy:S_N = 8.834(20) MeV (first neutron)
S_P = 2.949(19) MeV (first proton)Half-life:53.5(6) sDecay constant λ:0.012956022066541 s^-1Specific activity α:7.029098186410 × 10⁺¹⁹ Bq g^-1
1899756266.5975 Ci g^-1Spin and parity:
(nuclear angular momentum)(3+)Year of discovery:1959

Radioactive Decay

Half-life T_½ = 53.5(6) s respectively 5.35 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹¹²Sn	100 %	7.056(18) MeV

Parent Nuclides

Direct parent isotope is: ¹¹²Te.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 61) and isobaric (same nucleon number A = 112) with Antimony-112. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 61	Isobar A = 112
34	⁹⁵Se
35	⁹⁶Br
36	⁹⁷Kr
37	⁹⁸Rb
38	⁹⁹Sr
39	¹⁰⁰Y
40	¹⁰¹Zr	¹¹²Zr
41	¹⁰²Nb	¹¹²Nb
42	¹⁰³Mo	¹¹²Mo
43	¹⁰⁴Tc	¹¹²Tc
44	¹⁰⁵Ru	¹¹²Ru
45	¹⁰⁶Rh	¹¹²Rh
46	¹⁰⁷Pd	¹¹²Pd
47	¹⁰⁸Ag	¹¹²Ag
48	¹⁰⁹Cd	¹¹²Cd
49	¹¹⁰In	¹¹²In
50	¹¹¹Sn	¹¹²Sn
51	¹¹²Sb	¹¹²Sb
52	¹¹³Te	¹¹²Te
53	¹¹⁴I	¹¹²I
54	¹¹⁵Xe	¹¹²Xe
55	¹¹⁶Cs	¹¹²Cs
56	¹¹⁷Ba
57	¹¹⁸La
58	¹¹⁹Ce