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Indium-115

Properties and data of the isotope 115In.


Contents

See also: list of Indium isotopes.

 

General data

Name of the isotope:Indium-115; In-115Symbol:115In or 11549InMass number A:115 (= number of nucleons)Atomic number Z:49 (= number of protons)Neutrons N:66Isotopic mass:114.903878773(12) u (atomic weight of Indium-115)Nuclide mass:114.8769999 u (calculated nuclear mass without electrons)Mass excess:-89.53635 MeVMass defect:1.051432251 u (per nucleus)Nuclear binding energy:979.40283321 MeV (per nucleus)
8.51654638 MeV (average binding energy per nucleon)
Separation energy:SN = 9.0379(3) MeV (first neutron)
SP = 6.81038(28) MeV (first proton)
Half-life:4.41(25) × 1014 aDecay constant λ:4.98402560310 × 10-23 s-1Specific activity α:0.26328512483705 Bq g-1
7.115814184785 × 10-12 Ci g-1
Spin and parity:
(nuclear angular momentum)
9/2+Magnetic dipole moment:μ(μN) = +5.5326(4)Charge radius:4.6156(26) femtometer fmYear of discovery:1924

 

Radioactive Decay

Half-life T½ = 4.41(25) × 1014 a respectively 1.3907376 × 1022 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
β-115Sn100 %0.497489(10) MeV

 

Parent Nuclides

Direct parent isotope is: 115Cd.

 

Occurrence

Comparison of the natural Indium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Indium
Isotopic mixture
114.818 u100 %
Isotope 113In112.904062(6) u4.281(52) %stable9/2+
Isotope 115In114.903878773(12) u95.719(52) %4.41(25) × 1014 a9/2+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 115In

Isotope:115In-NMRQuantity:95.719(52) %Spin:9/2+Nuclearmagnetic moment
μ/μN:
+5.5326(4)Gyromagnetic ratio γ:5.8971 · 107 rad T-1 s-1Nuclear g-factor:gl = 1.2294666666667Quadrupole moment Q:+ 0.772(5) barn (100 fm2)Resonance frequency:v0 = 9.3856 at 1 TRelative Sensitivity:0.35348 (H0 = const.)
7.2745 (v0 = const.)
[related to 1H = 1.000]

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
115mIn336.244(17) keV4.486(4) h1/2-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 66) and isobaric (same nucleon number A = 115) with Indium-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 66Isobar A = 115
37103Rb
38104Sr
39105Y
40106Zr
41107Nb115Nb
42108Mo115Mo
43109Tc115Tc
44110Ru115Ru
45111Rh115Rh
46112Pd115Pd
47113Ag115Ag
48114Cd115Cd
49115In115In
50116Sn115Sn
51117Sb115Sb
52118Te115Te
53119I115I
54120Xe115Xe
55121Cs115Cs
56122Ba115Ba
57123La
58124Ce
59125Pr
60126Nd
61127Pm
62128Sm

 

External data and identifiers

Adopted Levels, Gammas:NuDat 115In

 


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Last update: 2020-10-16


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