Iridium-175

Properties and data of the isotope ¹⁷⁵Ir.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Iridium-175; Ir-175Symbol:¹⁷⁵Ir or 17577IrMass number A:175 (= number of nucleons)Atomic number Z:77 (= number of protons)Neutrons N:98Isotopic mass:174.964150(13) u (atomic weight of Iridium-175)Nuclide mass:174.9219138 u (calculated nuclear mass without electrons)Mass excess:-33.39406 MeVMass defect:1.487539232 u (per nucleus)Nuclear binding energy:1385.63386937 MeV (per nucleus)
7.91790782 MeV (average binding energy per nucleon)Separation energy:S_N = 10.602(27) MeV (first neutron)
S_P = 0.688(16) MeV (first proton)Half-life:9(2) sDecay constant λ:0.077016353395549 s^-1Specific activity α:2.665536371647 × 10⁺²⁰ Bq g^-1
7204152355.8041 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1967

Radioactive Decay

Half-life T_½ = 9(2) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷¹Re	0.85(28) %	5.43(3) MeV
EC/β⁺	¹⁷⁵Os	99.15(28) %	6.711(17) MeV

Parent Nuclides

Direct parent isotope is: ¹⁷⁹Au.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 98) and isobaric (same nucleon number A = 175) with Iridium-175. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 98	Isobar A = 175
57	¹⁵⁵La
58	¹⁵⁶Ce
59	¹⁵⁷Pr
60	¹⁵⁸Nd
61	¹⁵⁹Pm
62	¹⁶⁰Sm
63	¹⁶¹Eu
64	¹⁶²Gd
65	¹⁶³Tb
66	¹⁶⁴Dy
67	¹⁶⁵Ho	¹⁷⁵Ho
68	¹⁶⁶Er	¹⁷⁵Er
69	¹⁶⁷Tm	¹⁷⁵Tm
70	¹⁶⁸Yb	¹⁷⁵Yb
71	¹⁶⁹Lu	¹⁷⁵Lu
72	¹⁷⁰Hf	¹⁷⁵Hf
73	¹⁷¹Ta	¹⁷⁵Ta
74	¹⁷²W	¹⁷⁵W
75	¹⁷³Re	¹⁷⁵Re
76	¹⁷⁴Os	¹⁷⁵Os
77	¹⁷⁵Ir	¹⁷⁵Ir
78	¹⁷⁶Pt	¹⁷⁵Pt
79	¹⁷⁷Au	¹⁷⁵Au
80	¹⁷⁸Hg	¹⁷⁵Hg
81	¹⁷⁹Tl
82	¹⁸⁰Pb