Silver-126

Properties and data of the isotope ¹²⁶Ag.

Content

General data

Name of the isotope:Silver-126; Ag-126Symbol:¹²⁶Ag or 12647AgMass number A:126 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:79Isotopic mass:125.93486(21) u (atomic weight of Silver-126)
Excitation energy: +xNuclide mass:125.9090781 u (calculated nuclear mass without electrons)Mass excess:-60.67752 MeVMass defect:1.117444868 u (per nucleus)Nuclear binding energy:1040.89318987 MeV (per nucleus)
8.26105706 MeV (average binding energy per nucleon)Separation energy:S_N = 4.23(48) MeV (first neutron)
S_P = 13.85(45) MeV (first proton)Half-life:52(10) msDecay constant λ:1.3329753472307 s^-1Specific activity α:6.421892243076 × 10⁺²¹ Bq g^-1
173564655218.29 Ci g^-1Spin and parity:
(nuclear angular momentum)(3+)Year of discovery:1994

Radioactive Decay

Half-life T_½ = 52(10) ms respectively 5.2 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹²⁶Cd	100 %	11.58(29) MeV
β^-, n	¹²⁵Cd	?	4.60(20) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 79) and isobaric (same nucleon number A = 126) with Silver-126. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 79	Isobar A = 126
44	¹²³Ru
45	¹²⁴Rh	¹²⁶Rh
46	¹²⁵Pd	¹²⁶Pd
47	¹²⁶Ag	¹²⁶Ag
48	¹²⁷Cd	¹²⁶Cd
49	¹²⁸In	¹²⁶In
50	¹²⁹Sn	¹²⁶Sn
51	¹³⁰Sb	¹²⁶Sb
52	¹³¹Te	¹²⁶Te
53	¹³²I	¹²⁶I
54	¹³³Xe	¹²⁶Xe
55	¹³⁴Cs	¹²⁶Cs
56	¹³⁵Ba	¹²⁶Ba
57	¹³⁶La	¹²⁶La
58	¹³⁷Ce	¹²⁶Ce
59	¹³⁸Pr	¹²⁶Pr
60	¹³⁹Nd	¹²⁶Nd
61	¹⁴⁰Pm	¹²⁶Pm
62	¹⁴¹Sm
63	¹⁴²Eu
64	¹⁴³Gd
65	¹⁴⁴Tb
66	¹⁴⁵Dy
67	¹⁴⁶Ho
68	¹⁴⁷Er
69	¹⁴⁸Tm
70	¹⁴⁹Yb
71	¹⁵⁰Lu