Tellurium-119

Properties and data of the isotope ¹¹⁹Te.

Content

General data

Name of the isotope:Tellurium-119; Te-119Symbol:¹¹⁹Te or 11952TeMass number A:119 (= number of nucleons)Atomic number Z:52 (= number of protons)Neutrons N:67Isotopic mass:118.906407(9) u (atomic weight of Tellurium-119)Nuclide mass:118.8778826 u (calculated nuclear mass without electrons)Mass excess:-87.18132 MeVMass defect:1.081044036 u (per nucleus)Nuclear binding energy:1006.98603327 MeV (per nucleus)
8.46206751 MeV (average binding energy per nucleon)Separation energy:S_N = 7.556(20) MeV (first neutron)
S_P = 6.474(8) MeV (first proton)Half-life:16.05(5) hDecay constant λ:1.199631672827 × 10^-5 s^-1Specific activity α:6.122331282890 × 10⁺¹⁶ Bq g^-1
1654684.130511 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2+Magnetic dipole moment:μ(μ_N) = 0.25(5)Nuclear g-factor:g_l = 0.5Year of discovery:1948

Radioactive Decay

Half-life T_½ = 16.05(5) h (hours) respectively 5.7780 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹¹⁹Sb	97.04 %	2.293(11) MeV
β⁺	¹¹⁹Sb	2.06 %	?

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^119mTe	260.96(5) keV	4.70(4) d	11/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 67) and isobaric (same nucleon number A = 119) with Tellurium-119. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 67	Isobar A = 119
38	¹⁰⁵Sr
39	¹⁰⁶Y
40	¹⁰⁷Zr
41	¹⁰⁸Nb
42	¹⁰⁹Mo
43	¹¹⁰Tc	¹¹⁹Tc
44	¹¹¹Ru	¹¹⁹Ru
45	¹¹²Rh	¹¹⁹Rh
46	¹¹³Pd	¹¹⁹Pd
47	¹¹⁴Ag	¹¹⁹Ag
48	¹¹⁵Cd	¹¹⁹Cd
49	¹¹⁶In	¹¹⁹In
50	¹¹⁷Sn	¹¹⁹Sn
51	¹¹⁸Sb	¹¹⁹Sb
52	¹¹⁹Te	¹¹⁹Te
53	¹²⁰I	¹¹⁹I
54	¹²¹Xe	¹¹⁹Xe
55	¹²²Cs	¹¹⁹Cs
56	¹²³Ba	¹¹⁹Ba
57	¹²⁴La	¹¹⁹La
58	¹²⁵Ce	¹¹⁹Ce
59	¹²⁶Pr
60	¹²⁷Nd
61	¹²⁸Pm
62	¹²⁹Sm
63	¹³⁰Eu