Silver-131

Properties and data of the isotope ¹³¹Ag.

Content

General data

Name of the isotope:Silver-131; Ag-131Symbol:¹³¹Ag or 13147AgMass number A:131 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:84Isotopic mass:130.95665(54) u (atomic weight of Silver-131)Nuclide mass:130.9308681 u (calculated nuclear mass without electrons)Mass excess:-40.38026 MeVMass defect:1.138979448 u (per nucleus)Nuclear binding energy:1060.95252194 MeV (per nucleus)
8.09887421 MeV (average binding energy per nucleon)Separation energy:S_N = 2.75(71) MeV (first neutron)Half-life:35(8) msDecay constant λ:19.804205158856 s^-1Specific activity α:9.174131775824 × 10⁺²² Bq g^-1
2479495074547.1 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2012

Radioactive Decay

Half-life T_½ = 35(8) ms respectively 3.5 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	¹³¹Cd	100 %	14.84(51) MeV
β^-, n	¹³⁰Cd	?	12.67(50) MeV
β^-, 2n	¹²⁹Cd	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 84) and isobaric (same nucleon number A = 131) with Silver-131. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 84	Isobar A = 131
47	¹³¹Ag	¹³¹Ag
48	¹³²Cd	¹³¹Cd
49	¹³³In	¹³¹In
50	¹³⁴Sn	¹³¹Sn
51	¹³⁵Sb	¹³¹Sb
52	¹³⁶Te	¹³¹Te
53	¹³⁷I	¹³¹I
54	¹³⁸Xe	¹³¹Xe
55	¹³⁹Cs	¹³¹Cs
56	¹⁴⁰Ba	¹³¹Ba
57	¹⁴¹La	¹³¹La
58	¹⁴²Ce	¹³¹Ce
59	¹⁴³Pr	¹³¹Pr
60	¹⁴⁴Nd	¹³¹Nd
61	¹⁴⁵Pm	¹³¹Pm
62	¹⁴⁶Sm	¹³¹Sm
63	¹⁴⁷Eu	¹³¹Eu
64	¹⁴⁸Gd
65	¹⁴⁹Tb
66	¹⁵⁰Dy
67	¹⁵¹Ho
68	¹⁵²Er
69	¹⁵³Tm
70	¹⁵⁴Yb
71	¹⁵⁵Lu
72	¹⁵⁶Hf
73	¹⁵⁷Ta
74	¹⁵⁸W
75	¹⁵⁹Re