Silver-109m

Properties and data of the isotope ¹⁰⁹Ag.

Content

General data

Name of the isotope:Silver-109m; Ag-109mSymbol:¹⁰⁹Ag or 10947AgMass number A:109 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:62Isotopic mass:108.904755(9) u (atomic weight of Silver-109m)
Excitation energy: 88.03337(10) keVNuclide mass:108.8789731 u (calculated nuclear mass without electrons)Mass excess:-88.72015 MeVMass defect:1.000246296 u (per nucleus)Nuclear binding energy:931.72342325 MeV (per nucleus)
8.54792131 MeV (average binding energy per nucleon)Half-life:39.79(21) sDecay constant λ:0.017420135223924 s^-1Specific activity α:9.713565566446 × 10⁺¹⁹ Bq g^-1
2625287990.9314 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2+Magnetic dipole moment:μ(μ_N) = 4.394(6)Quadrupole moment Q:+1.02(12) barn (100 fm²)Nuclear g-factor:g_l = 1.2554285714286

Radioactive Decay

Half-life T_½ = 39.79(21) s respectively 3.979 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹⁰⁹Ag	100 %

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
¹⁰⁹Ag		stable	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 62) and isobaric (same nucleon number A = 109) with Silver-109m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 62	Isobar A = 109
35	⁹⁷Br
36	⁹⁸Kr
37	⁹⁹Rb
38	¹⁰⁰Sr
39	¹⁰¹Y	¹⁰⁹Y
40	¹⁰²Zr	¹⁰⁹Zr
41	¹⁰³Nb	¹⁰⁹Nb
42	¹⁰⁴Mo	¹⁰⁹Mo
43	¹⁰⁵Tc	¹⁰⁹Tc
44	¹⁰⁶Ru	¹⁰⁹Ru
45	¹⁰⁷Rh	¹⁰⁹Rh
46	¹⁰⁸Pd	¹⁰⁹Pd
47	¹⁰⁹Ag	¹⁰⁹Ag
48	¹¹⁰Cd	¹⁰⁹Cd
49	¹¹¹In	¹⁰⁹In
50	¹¹²Sn	¹⁰⁹Sn
51	¹¹³Sb	¹⁰⁹Sb
52	¹¹⁴Te	¹⁰⁹Te
53	¹¹⁵I	¹⁰⁹I
54	¹¹⁶Xe	¹⁰⁹Xe
55	¹¹⁷Cs
56	¹¹⁸Ba
57	¹¹⁹La
58	¹²⁰Ce
59	¹²¹Pr