Silver-118

Properties and data of the isotope ¹¹⁸Ag.

Content

General data

Name of the isotope:Silver-118; Ag-118Symbol:¹¹⁸Ag or 11847AgMass number A:118 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:71Isotopic mass:117.9145955(27) u (atomic weight of Silver-118)Nuclide mass:117.8888136 u (calculated nuclear mass without electrons)Mass excess:-79.55378 MeVMass defect:1.06839004 u (per nucleus)Nuclear binding energy:995.19891192 MeV (per nucleus)
8.43388908 MeV (average binding energy per nucleon)Separation energy:S_N = 5.443(14) MeV (first neutron)
S_P = 10.418(8) MeV (first proton)Half-life:3.76(15) sDecay constant λ:0.18434765440424 s^-1Specific activity α:9.488611470267 × 10⁺²⁰ Bq g^-1
25644895865.587 Ci g^-1Spin and parity:
(nuclear angular momentum)1(-)Year of discovery:1967

Radioactive Decay

Half-life T_½ = 3.76(15) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹⁸Cd	100 %	7.148(20) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁸Pd.

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
^118mAg	127.63(10) keV	2.0(2) s	4(+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 71) and isobaric (same nucleon number A = 118) with Silver-118. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 71	Isobar A = 118
40	¹¹¹Zr
41	¹¹²Nb
42	¹¹³Mo	¹¹⁸Mo
43	¹¹⁴Tc	¹¹⁸Tc
44	¹¹⁵Ru	¹¹⁸Ru
45	¹¹⁶Rh	¹¹⁸Rh
46	¹¹⁷Pd	¹¹⁸Pd
47	¹¹⁸Ag	¹¹⁸Ag
48	¹¹⁹Cd	¹¹⁸Cd
49	¹²⁰In	¹¹⁸In
50	¹²¹Sn	¹¹⁸Sn
51	¹²²Sb	¹¹⁸Sb
52	¹²³Te	¹¹⁸Te
53	¹²⁴I	¹¹⁸I
54	¹²⁵Xe	¹¹⁸Xe
55	¹²⁶Cs	¹¹⁸Cs
56	¹²⁷Ba	¹¹⁸Ba
57	¹²⁸La	¹¹⁸La
58	¹²⁹Ce
59	¹³⁰Pr
60	¹³¹Nd
61	¹³²Pm
62	¹³³Sm
63	¹³⁴Eu
64	¹³⁵Gd
65	¹³⁶Tb