Indium-107

Properties and data of the isotope ¹⁰⁷In.

Content

General data

Name of the isotope:Indium-107; In-107Symbol:¹⁰⁷In or 10749InMass number A:107 (= number of nucleons)Atomic number Z:49 (= number of protons)Neutrons N:58Isotopic mass:106.910290(12) u (atomic weight of Indium-107)Nuclide mass:106.8834111 u (calculated nuclear mass without electrons)Mass excess:-83.56433 MeVMass defect:0.975701696 u (per nucleus)Nuclear binding energy:908.86027561 MeV (per nucleus)
8.49402127 MeV (average binding energy per nucleon)Separation energy:S_N = 11.027(17) MeV (first neutron)
S_P = 3.721(11) MeV (first proton)Half-life:32.4(3) minDecay constant λ:0.00035655719164606 s^-1Specific activity α:2.025695879920 × 10⁺¹⁸ Bq g^-1
54748537.295157 Ci g^-1Spin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μ_N) = + 5.577(8)Quadrupole moment Q:+0.807 barn (100 fm²)Nuclear g-factor:g_l = 1.2393333333333Charge radius:4.5494(82) femtometer fmYear of discovery:1949

Radioactive Decay

Half-life T_½ = 32.4(3) min (minutes) respectively 1.944 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹⁰⁷Cd	100 %	3.426(11) MeV

Parent Nuclides

Direct parent isotope is: ¹⁰⁷Sn.

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
^107mIn	678.5(3) keV	50.4(6) s	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 58) and isobaric (same nucleon number A = 107) with Indium-107. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 58	Isobar A = 107
32	⁹⁰Ge
33	⁹¹As
34	⁹²Se
35	⁹³Br
36	⁹⁴Kr
37	⁹⁵Rb
38	⁹⁶Sr	¹⁰⁷Sr
39	⁹⁷Y	¹⁰⁷Y
40	⁹⁸Zr	¹⁰⁷Zr
41	⁹⁹Nb	¹⁰⁷Nb
42	¹⁰⁰Mo	¹⁰⁷Mo
43	¹⁰¹Tc	¹⁰⁷Tc
44	¹⁰²Ru	¹⁰⁷Ru
45	¹⁰³Rh	¹⁰⁷Rh
46	¹⁰⁴Pd	¹⁰⁷Pd
47	¹⁰⁵Ag	¹⁰⁷Ag
48	¹⁰⁶Cd	¹⁰⁷Cd
49	¹⁰⁷In	¹⁰⁷In
50	¹⁰⁸Sn	¹⁰⁷Sn
51	¹⁰⁹Sb	¹⁰⁷Sb
52	¹¹⁰Te	¹⁰⁷Te
53	¹¹¹I
54	¹¹²Xe
55	¹¹³Cs
56	¹¹⁴Ba