Silver-111m

Properties and data of the isotope ^111mAg.

Contents

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

General data

Name of the isotope:Silver-111m; Ag-111mSymbol:^111mAg or 111m47AgMass number A:111 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:64Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.3617021276596 (= neutron-proton ratio)Neutron excess (N-Z):17Excitation energy:59.82(4) keVIsotopic mass:110.9052968(16) u (atomic weight of Silver-111m)Nuclide mass:110.8795149 u (calculated nuclear mass without electrons)Mass excess:-88.21546 MeVMass defect:1.017034328 u (per nucleus)Nuclear binding energy:947.36137433 MeV (per nucleus)
8.53478716 MeV (average binding energy per nucleon)Half-life:64.8(8) sDecay constant λ:0.010696715749382 s^-1Specific activity α:5.856102634680 × 10⁺¹⁹ Bq g^-1
1582730441.8054 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2+

Radioactive Decay

Half-life T_½ = 64.8(8) s respectively 6.48 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹¹Cd	0.7(2) %
Iso	¹¹¹Ag	99.3(2) %

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
¹¹¹Ag		7.45(1) d	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 64) and isobaric (same nucleon number A = 111) with Silver-111m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 64	Isobar A = 111
36	¹⁰⁰Kr
37	¹⁰¹Rb
38	¹⁰²Sr
39	¹⁰³Y
40	¹⁰⁴Zr	¹¹¹Zr
41	¹⁰⁵Nb	¹¹¹Nb
42	¹⁰⁶Mo	¹¹¹Mo
43	¹⁰⁷Tc	¹¹¹Tc
44	¹⁰⁸Ru	¹¹¹Ru
45	¹⁰⁹Rh	¹¹¹Rh
46	¹¹⁰Pd	¹¹¹Pd
47	¹¹¹Ag	¹¹¹Ag
48	¹¹²Cd	¹¹¹Cd
49	¹¹³In	¹¹¹In
50	¹¹⁴Sn	¹¹¹Sn
51	¹¹⁵Sb	¹¹¹Sb
52	¹¹⁶Te	¹¹¹Te
53	¹¹⁷I	¹¹¹I
54	¹¹⁸Xe	¹¹¹Xe
55	¹¹⁹Cs
56	¹²⁰Ba
57	¹²¹La
58	¹²²Ce
59	¹²³Pr
60	¹²⁴Nd