Silver-115m

Properties and data of the isotope ^115mAg.

Contents

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

General data

Name of the isotope:Silver-115m; Ag-115mSymbol:^115mAg or 115m47AgMass number A:115 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:68Isotopic mass:114.908767(20) u (atomic weight of Silver-115m)
Excitation energy: 41.16(10) keVNuclide mass:114.8829851 u (calculated nuclear mass without electrons)Mass excess:-84.98299 MeVMass defect:1.048223792 u (per nucleus)Nuclear binding energy:976.41417291 MeV (per nucleus)
8.49055803 MeV (average binding energy per nucleon)Half-life:18.0(7) sDecay constant λ:0.038508176697775 s^-1Specific activity α:2.03422512573 × 10⁺²⁰ Bq g^-1
5497905745.2189 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2+

Radioactive Decay

Half-life T_½ = 18.0(7) s respectively 1.80 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹⁵Cd	79.0(3) %
Iso	¹¹⁵Ag	21.0(3) %

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
¹¹⁵Ag		20.0(5) min	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 68) and isobaric (same nucleon number A = 115) with Silver-115m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 68	Isobar A = 115
38	¹⁰⁶Sr
39	¹⁰⁷Y
40	¹⁰⁸Zr
41	¹⁰⁹Nb	¹¹⁵Nb
42	¹¹⁰Mo	¹¹⁵Mo
43	¹¹¹Tc	¹¹⁵Tc
44	¹¹²Ru	¹¹⁵Ru
45	¹¹³Rh	¹¹⁵Rh
46	¹¹⁴Pd	¹¹⁵Pd
47	¹¹⁵Ag	¹¹⁵Ag
48	¹¹⁶Cd	¹¹⁵Cd
49	¹¹⁷In	¹¹⁵In
50	¹¹⁸Sn	¹¹⁵Sn
51	¹¹⁹Sb	¹¹⁵Sb
52	¹²⁰Te	¹¹⁵Te
53	¹²¹I	¹¹⁵I
54	¹²²Xe	¹¹⁵Xe
55	¹²³Cs	¹¹⁵Cs
56	¹²⁴Ba	¹¹⁵Ba
57	¹²⁵La
58	¹²⁶Ce
59	¹²⁷Pr
60	¹²⁸Nd
61	¹²⁹Pm
62	¹³⁰Sm
63	¹³¹Eu