Indium-116m2

Properties and data of the isotope ^116m2In.

Contents

General data

Name of the isotope:Indium-116m2; In-116m2Symbol:^116m2In or 116m249InMass number A:116 (= number of nucleons)Atomic number Z:49 (= number of protons)Neutrons N:67Isotopic mass:115.90525999(24) u (atomic weight of Indium-116m2)
Excitation energy: 289.660(6) keVNuclide mass:115.8783811 u (calculated nuclear mass without electrons)Mass excess:-88.24975 MeVMass defect:1.05871595 u (per nucleus)Nuclear binding energy:986.18755513 MeV (per nucleus)
8.50161685 MeV (average binding energy per nucleon)Half-life:2.18(4) sDecay constant λ:0.3179574222752 s^-1Specific activity α:1.665029899481 × 10⁺²¹ Bq g^-1
45000808094.095 Ci g^-1Spin and parity:
(nuclear angular momentum)8-Magnetic dipole moment:μ(μ_N) = +3.210(11)Quadrupole moment Q:0.310(9) barn (100 fm²)Nuclear g-factor:g_l = 0.40125

Radioactive Decay

Half-life T_½ = 2.18(4) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹¹⁶In	100 %

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
¹¹⁶In		14.10(3) s	1+
^116m1In	127.267(6) keV	54.29(17) min	5+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 67) and isobaric (same nucleon number A = 116) with Indium-116m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 67	Isobar A = 116
38	¹⁰⁵Sr
39	¹⁰⁶Y
40	¹⁰⁷Zr
41	¹⁰⁸Nb
42	¹⁰⁹Mo	¹¹⁶Mo
43	¹¹⁰Tc	¹¹⁶Tc
44	¹¹¹Ru	¹¹⁶Ru
45	¹¹²Rh	¹¹⁶Rh
46	¹¹³Pd	¹¹⁶Pd
47	¹¹⁴Ag	¹¹⁶Ag
48	¹¹⁵Cd	¹¹⁶Cd
49	¹¹⁶In	¹¹⁶In
50	¹¹⁷Sn	¹¹⁶Sn
51	¹¹⁸Sb	¹¹⁶Sb
52	¹¹⁹Te	¹¹⁶Te
53	¹²⁰I	¹¹⁶I
54	¹²¹Xe	¹¹⁶Xe
55	¹²²Cs	¹¹⁶Cs
56	¹²³Ba	¹¹⁶Ba
57	¹²⁴La	¹¹⁶La
58	¹²⁵Ce
59	¹²⁶Pr
60	¹²⁷Nd
61	¹²⁸Pm
62	¹²⁹Sm
63	¹³⁰Eu