Iridium-193

Properties and data of the isotope ¹⁹³Ir.

Contents

General Data

Parent Nuclides

NMR Data

Isotones und Isobares

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

General data

Name of the isotope:Iridium-193; Ir-193Symbol:¹⁹³Ir or 19377IrMass number A:193 (= number of nucleons)Atomic number Z:77 (= number of protons)Neutrons N:116Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.5064935064935 (= neutron-proton ratio)Neutron excess (N-Z):39Isotopic mass:192.96292(2) u (atomic weight of Iridium-193)Nuclide mass:192.9206838 u (calculated nuclear mass without electrons)Mass excess:-34.5398 MeVMass defect:1.64473772 u (per nucleus)Nuclear binding energy:1532.06331775 MeV (per nucleus)
7.93815191 MeV (average binding energy per nucleon)Separation energy:S_N = 7.77199(20) MeV (first neutron)
S_P = 5.9430(24) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)3/2+Magnetic dipole moment:μ(μ_N) = + 0.1637(6)Charge radius:5.4032(1061) femtometer fmYear of discovery:1935

Parent Nuclides

Direct parent isotopes are: ¹⁹³Os, ¹⁹³Pt.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Iridium Isotopic mixture	192.217 u	100 %
Isotope ¹⁹¹Ir	190.96059(2) u	37.3(2) %	stable	3/2+
Isotope ¹⁹³Ir	192.96292(2) u	62.7(2) %	stable	3/2+

NMR data

Nuclear magnetic properties and parameters of the NMR active Nuclide ¹⁹³Ir

Isotope:¹⁹³Ir-NMRQuantity:62.7(2) %Spin:3/2+Nuclearmagnetic moment
μ/μ_N:+ 0.1637(6)Gyromagnetic ratio γ:0.508 · 10⁷ rad T^-1 s^-1
0.80851 MHz T^-1Nuclear g-factor:g_l = 0.10913333333333Quadrupole moment Q:+ 0.751(9) barn (100 fm²)Resonance frequency:v₀ = 0.8319 MHz at 1 TRelative Sensitivity:[related to ¹H = 1.000]:
0.00004 (H₀ = const.)
0.0977 (v₀ = const.)

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
^193mIr	80.239(6) keV	10.53(4) d	11/2-
^193m2Ir	2278.9(5) keV	124.8(21) μs	31/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 116) and isobaric (same nucleon number A = 193) with Iridium-193. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 116	Isobar A = 193
71	¹⁸⁷Lu
72	¹⁸⁸Hf
73	¹⁸⁹Ta	¹⁹³Ta
74	¹⁹⁰W	¹⁹³W
75	¹⁹¹Re	¹⁹³Re
76	¹⁹²Os	¹⁹³Os
77	¹⁹³Ir	¹⁹³Ir
78	¹⁹⁴Pt	¹⁹³Pt
79	¹⁹⁵Au	¹⁹³Au
80	¹⁹⁶Hg	¹⁹³Hg
81	¹⁹⁷Tl	¹⁹³Tl
82	¹⁹⁸Pb	¹⁹³Pb
83	¹⁹⁹Bi	¹⁹³Bi
84	²⁰⁰Po	¹⁹³Po
85	²⁰¹At	¹⁹³At
86	²⁰²Rn	¹⁹³Rn
87	²⁰³Fr
88	²⁰⁴Ra
89	²⁰⁵Ac