Antimony-111

Properties and data of the isotope ¹¹¹Sb.

Contents

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

General data

Name of the isotope:Antimony-111; Sb-111Symbol:¹¹¹Sb or 11151SbMass number A:111 (= number of nucleons)Atomic number Z:51 (= number of protons)Neutrons N:60Isotopic mass:110.913218(9) u (atomic weight of Antimony-111)Nuclide mass:110.8852421 u (calculated nuclear mass without electrons)Mass excess:-80.83691 MeVMass defect:1.005753592 u (per nucleus)Nuclear binding energy:936.85343643 MeV (per nucleus)
8.44012105 MeV (average binding energy per nucleon)Separation energy:S_N = 11.458(11) MeV (first neutron)
S_P = 2.284(16) MeV (first proton)Half-life:75(1) sDecay constant λ:0.0092419624074659 s^-1Specific activity α:5.059672676363 × 10⁺¹⁹ Bq g^-1
1367479101.7199 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2+)Year of discovery:1972

Radioactive Decay

Half-life T_½ = 75(1) s respectively 7.5 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹¹¹Sn	100 %	5.102(10) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 60) and isobaric (same nucleon number A = 111) with Antimony-111. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 60	Isobar A = 111
34	⁹⁴Se
35	⁹⁵Br
36	⁹⁶Kr
37	⁹⁷Rb
38	⁹⁸Sr
39	⁹⁹Y
40	¹⁰⁰Zr	¹¹¹Zr
41	¹⁰¹Nb	¹¹¹Nb
42	¹⁰²Mo	¹¹¹Mo
43	¹⁰³Tc	¹¹¹Tc
44	¹⁰⁴Ru	¹¹¹Ru
45	¹⁰⁵Rh	¹¹¹Rh
46	¹⁰⁶Pd	¹¹¹Pd
47	¹⁰⁷Ag	¹¹¹Ag
48	¹⁰⁸Cd	¹¹¹Cd
49	¹⁰⁹In	¹¹¹In
50	¹¹⁰Sn	¹¹¹Sn
51	¹¹¹Sb	¹¹¹Sb
52	¹¹²Te	¹¹¹Te
53	¹¹³I	¹¹¹I
54	¹¹⁴Xe	¹¹¹Xe
55	¹¹⁵Cs
56	¹¹⁶Ba
57	¹¹⁷La