Silver-117

Properties and data of the isotope ¹¹⁷Ag.

Content

General data

Name of the isotope:Silver-117; Ag-117Symbol:¹¹⁷Ag or 11747AgMass number A:117 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:70Isotopic mass:116.911774(15) u (atomic weight of Silver-117)Nuclide mass:116.8859921 u (calculated nuclear mass without electrons)Mass excess:-82.18199 MeVMass defect:1.062546624 u (per nucleus)Nuclear binding energy:989.75580498 MeV (per nucleus)
8.45945132 MeV (average binding energy per nucleon)Separation energy:S_N = 7.711(14) MeV (first neutron)
S_P = 9.639(15) MeV (first proton)Half-life:ca. 72.8 sDecay constant λ:0.009521252480219 s^-1Specific activity α:4.942958930939 × 10⁺¹⁹ Bq g^-1
1335934846.1999 Ci g^-1Spin and parity:
(nuclear angular momentum)(1/2-)Year of discovery:1958

Radioactive Decay

Half-life T_½ = ca. 72.8 s respectively 7.28 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹⁷Cd	100 %	4.236(14) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁷Pd.

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
^117mAg	28.6(2) keV	5.34(5) s	(7/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 70) and isobaric (same nucleon number A = 117) with Silver-117. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 70	Isobar A = 117
39	¹⁰⁹Y
40	¹¹⁰Zr
41	¹¹¹Nb
42	¹¹²Mo	¹¹⁷Mo
43	¹¹³Tc	¹¹⁷Tc
44	¹¹⁴Ru	¹¹⁷Ru
45	¹¹⁵Rh	¹¹⁷Rh
46	¹¹⁶Pd	¹¹⁷Pd
47	¹¹⁷Ag	¹¹⁷Ag
48	¹¹⁸Cd	¹¹⁷Cd
49	¹¹⁹In	¹¹⁷In
50	¹²⁰Sn	¹¹⁷Sn
51	¹²¹Sb	¹¹⁷Sb
52	¹²²Te	¹¹⁷Te
53	¹²³I	¹¹⁷I
54	¹²⁴Xe	¹¹⁷Xe
55	¹²⁵Cs	¹¹⁷Cs
56	¹²⁶Ba	¹¹⁷Ba
57	¹²⁷La	¹¹⁷La
58	¹²⁸Ce
59	¹²⁹Pr
60	¹³⁰Nd
61	¹³¹Pm
62	¹³²Sm
63	¹³³Eu
64	¹³⁴Gd
65	¹³⁵Tb