Tellurium-111

Properties and data of the isotope ¹¹¹Te.

Content

General data

Name of the isotope:Tellurium-111; Te-111Symbol:¹¹¹Te or 11152TeMass number A:111 (= number of nucleons)Atomic number Z:52 (= number of protons)Neutrons N:59Isotopic mass:110.921001(7) u (atomic weight of Tellurium-111)Nuclide mass:110.8924766 u (calculated nuclear mass without electrons)Mass excess:-73.58709 MeVMass defect:0.997130708 u (per nucleus)Nuclear binding energy:928.82127172 MeV (per nucleus)
8.3677592 MeV (average binding energy per nucleon)Separation energy:S_N = 9.429(9) MeV (first neutron)
S_P = 3.427(9) MeV (first proton)Half-life:19.3(4) sDecay constant λ:0.035914361687044 s^-1Specific activity α:1.96619404521 × 10⁺²⁰ Bq g^-1
5314037960.0514 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2)+Year of discovery:1967

Radioactive Decay

Half-life T_½ = 19.3(4) s respectively 1.93 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹¹¹Sb	100 %	7.249(11) MeV
β⁺, p	¹¹⁰Sb	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 111) with Tellurium-111. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 59	Isobar A = 111
33	⁹²As
34	⁹³Se
35	⁹⁴Br
36	⁹⁵Kr
37	⁹⁶Rb
38	⁹⁷Sr
39	⁹⁸Y
40	⁹⁹Zr	¹¹¹Zr
41	¹⁰⁰Nb	¹¹¹Nb
42	¹⁰¹Mo	¹¹¹Mo
43	¹⁰²Tc	¹¹¹Tc
44	¹⁰³Ru	¹¹¹Ru
45	¹⁰⁴Rh	¹¹¹Rh
46	¹⁰⁵Pd	¹¹¹Pd
47	¹⁰⁶Ag	¹¹¹Ag
48	¹⁰⁷Cd	¹¹¹Cd
49	¹⁰⁸In	¹¹¹In
50	¹⁰⁹Sn	¹¹¹Sn
51	¹¹⁰Sb	¹¹¹Sb
52	¹¹¹Te	¹¹¹Te
53	¹¹²I	¹¹¹I
54	¹¹³Xe	¹¹¹Xe
55	¹¹⁴Cs
56	¹¹⁵Ba
57	¹¹⁶La