Tin-126

Properties and data of the isotope ¹²⁶Sn.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Tin-126; Sn-126Symbol:¹²⁶Sn or 12650SnMass number A:126 (= number of nucleons)Atomic number Z:50 (= number of protons)Neutrons N:76Isotopic mass:125.907659(11) u (atomic weight of Tin-126)Nuclide mass:125.8802316 u (calculated nuclear mass without electrons)Mass excess:-86.01509 MeVMass defect:1.142126216 u (per nucleus)Nuclear binding energy:1063.88371745 MeV (per nucleus)
8.44352157 MeV (average binding energy per nucleon)Separation energy:S_N = 8.19(1) MeV (first neutron)
S_P = 12.827(29) MeV (first proton)Half-life:2.30(14) × 10⁵ aDecay constant λ:9.556327352038 × 10^-14 s^-1Specific activity α:460396395.34114 Bq g^-1
0.012443145820031 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1962

Radioactive Decay

Half-life T_½ = 2.30(14) × 10⁵ a respectively 7.25328 × 10¹² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹²⁶Sb	100 %	0.38(3) MeV

Parent Nuclides

Direct parent isotopes are: ¹²⁶In, ¹²⁷In.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 76) and isobaric (same nucleon number A = 126) with Tin-126. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 76	Isobar A = 126
42	¹¹⁸Mo
43	¹¹⁹Tc
44	¹²⁰Ru
45	¹²¹Rh	¹²⁶Rh
46	¹²²Pd	¹²⁶Pd
47	¹²³Ag	¹²⁶Ag
48	¹²⁴Cd	¹²⁶Cd
49	¹²⁵In	¹²⁶In
50	¹²⁶Sn	¹²⁶Sn
51	¹²⁷Sb	¹²⁶Sb
52	¹²⁸Te	¹²⁶Te
53	¹²⁹I	¹²⁶I
54	¹³⁰Xe	¹²⁶Xe
55	¹³¹Cs	¹²⁶Cs
56	¹³²Ba	¹²⁶Ba
57	¹³³La	¹²⁶La
58	¹³⁴Ce	¹²⁶Ce
59	¹³⁵Pr	¹²⁶Pr
60	¹³⁶Nd	¹²⁶Nd
61	¹³⁷Pm	¹²⁶Pm
62	¹³⁸Sm
63	¹³⁹Eu
64	¹⁴⁰Gd
65	¹⁴¹Tb
66	¹⁴²Dy
67	¹⁴³Ho
68	¹⁴⁴Er
69	¹⁴⁵Tm