Silver-127

Properties and data of the isotope ¹²⁷Ag.

Content

General data

Name of the isotope:Silver-127; Ag-127Symbol:¹²⁷Ag or 12747AgMass number A:127 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:80Isotopic mass:126.93726(21) u (atomic weight of Silver-127)Nuclide mass:126.9114781 u (calculated nuclear mass without electrons)Mass excess:-58.44193 MeVMass defect:1.123709784 u (per nucleus)Nuclear binding energy:1046.72892154 MeV (per nucleus)
8.24196001 MeV (average binding energy per nucleon)Separation energy:S_N = 5.83(28) MeV (first neutron)
S_P = 13.87(45) MeV (first proton)Half-life:109(25) msDecay constant λ:6.3591484455041 s^-1Specific activity α:3.039340292704 × 10⁺²² Bq g^-1
821443322352.49 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1995

Radioactive Decay

Half-life T_½ = 109(25) ms respectively 1.09 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹²⁷Cd	100 %	10.31(20) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 80) and isobaric (same nucleon number A = 127) with Silver-127. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 80	Isobar A = 127
44	¹²⁴Ru
45	¹²⁵Rh	¹²⁷Rh
46	¹²⁶Pd	¹²⁷Pd
47	¹²⁷Ag	¹²⁷Ag
48	¹²⁸Cd	¹²⁷Cd
49	¹²⁹In	¹²⁷In
50	¹³⁰Sn	¹²⁷Sn
51	¹³¹Sb	¹²⁷Sb
52	¹³²Te	¹²⁷Te
53	¹³³I	¹²⁷I
54	¹³⁴Xe	¹²⁷Xe
55	¹³⁵Cs	¹²⁷Cs
56	¹³⁶Ba	¹²⁷Ba
57	¹³⁷La	¹²⁷La
58	¹³⁸Ce	¹²⁷Ce
59	¹³⁹Pr	¹²⁷Pr
60	¹⁴⁰Nd	¹²⁷Nd
61	¹⁴¹Pm	¹²⁷Pm
62	¹⁴²Sm
63	¹⁴³Eu
64	¹⁴⁴Gd
65	¹⁴⁵Tb
66	¹⁴⁶Dy
67	¹⁴⁷Ho
68	¹⁴⁸Er
69	¹⁴⁹Tm
70	¹⁵⁰Yb
71	¹⁵¹Lu