Tellurium-118

Properties and data of the isotope ¹¹⁸Te.

Content

General data

Name of the isotope:Tellurium-118; Te-118Symbol:¹¹⁸Te or 11852TeMass number A:118 (= number of nucleons)Atomic number Z:52 (= number of protons)Neutrons N:66Isotopic mass:117.905854(20) u (atomic weight of Tellurium-118)Nuclide mass:117.8773296 u (calculated nuclear mass without electrons)Mass excess:-87.69643 MeVMass defect:1.07293212 u (per nucleus)Nuclear binding energy:999.42983219 MeV (per nucleus)
8.46974434 MeV (average binding energy per nucleon)Separation energy:S_N = 10.672(23) MeV (first neutron)
S_P = 6.346(20) MeV (first proton)Half-life:6.00(2) dDecay constant λ:1.337089468672 × 10^-6 s^-1Specific activity α:6.882171899730 × 10⁺¹⁵ Bq g^-1
186004.64593867 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.6956(105) femtometer fmYear of discovery:1948

Radioactive Decay

Half-life T_½ = 6.00(2) d respectively 5.18400 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE	¹¹⁸Sb	100 %	0.300(19) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁸I.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 66) and isobaric (same nucleon number A = 118) with Tellurium-118. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 66	Isobar A = 118
37	¹⁰³Rb
38	¹⁰⁴Sr
39	¹⁰⁵Y
40	¹⁰⁶Zr
41	¹⁰⁷Nb
42	¹⁰⁸Mo	¹¹⁸Mo
43	¹⁰⁹Tc	¹¹⁸Tc
44	¹¹⁰Ru	¹¹⁸Ru
45	¹¹¹Rh	¹¹⁸Rh
46	¹¹²Pd	¹¹⁸Pd
47	¹¹³Ag	¹¹⁸Ag
48	¹¹⁴Cd	¹¹⁸Cd
49	¹¹⁵In	¹¹⁸In
50	¹¹⁶Sn	¹¹⁸Sn
51	¹¹⁷Sb	¹¹⁸Sb
52	¹¹⁸Te	¹¹⁸Te
53	¹¹⁹I	¹¹⁸I
54	¹²⁰Xe	¹¹⁸Xe
55	¹²¹Cs	¹¹⁸Cs
56	¹²²Ba	¹¹⁸Ba
57	¹²³La	¹¹⁸La
58	¹²⁴Ce
59	¹²⁵Pr
60	¹²⁶Nd
61	¹²⁷Pm
62	¹²⁸Sm