Silver-104m

Properties and data of the isotope ¹⁰⁴Ag.

Content

General data

Name of the isotope:Silver-104m; Ag-104mSymbol:¹⁰⁴Ag or 10447AgMass number A:104 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:57Isotopic mass:103.908624(4) u (atomic weight of Silver-104m)
Excitation energy: 6.90(22) keVNuclide mass:103.8828421 u (calculated nuclear mass without electrons)Mass excess:-85.1162 MeVMass defect:0.953052716 u (per nucleus)Nuclear binding energy:887.76288664 MeV (per nucleus)
8.5361816 MeV (average binding energy per nucleon)Half-life:33.5(20) minDecay constant λ:0.00034484934356216 s^-1Specific activity α:2.016244002318 × 10⁺¹⁸ Bq g^-1
54493081.143743 Ci g^-1Spin and parity:
(nuclear angular momentum)2+Magnetic dipole moment:μ(μ_N) = + 3.686(3)Nuclear g-factor:g_l = 1.843

Radioactive Decay

Half-life T_½ = 33.5(20) min (minutes) respectively 2.010 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹⁰⁴Pd	> 99.93 %
Iso	¹⁰⁴Ag	< 0.07 %

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
¹⁰⁴Ag		69.2(10) min	5+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 57) and isobaric (same nucleon number A = 104) with Silver-104m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 57	Isobar A = 104
32	⁸⁹Ge
33	⁹⁰As
34	⁹¹Se
35	⁹²Br
36	⁹³Kr
37	⁹⁴Rb
38	⁹⁵Sr	¹⁰⁴Sr
39	⁹⁶Y	¹⁰⁴Y
40	⁹⁷Zr	¹⁰⁴Zr
41	⁹⁸Nb	¹⁰⁴Nb
42	⁹⁹Mo	¹⁰⁴Mo
43	¹⁰⁰Tc	¹⁰⁴Tc
44	¹⁰¹Ru	¹⁰⁴Ru
45	¹⁰²Rh	¹⁰⁴Rh
46	¹⁰³Pd	¹⁰⁴Pd
47	¹⁰⁴Ag	¹⁰⁴Ag
48	¹⁰⁵Cd	¹⁰⁴Cd
49	¹⁰⁶In	¹⁰⁴In
50	¹⁰⁷Sn	¹⁰⁴Sn
51	¹⁰⁸Sb	¹⁰⁴Sb
52	¹⁰⁹Te
53	¹¹⁰I
54	¹¹¹Xe
55	¹¹²Cs