Osmium-175

Properties and data of the isotope ¹⁷⁵Os.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Osmium-175; Os-175Symbol:¹⁷⁵Os or 17576OsMass number A:175 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:99Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.3026315789474 (= neutron-proton ratio)Neutron excess (N-Z):23Isotopic mass:174.956945(13) u (atomic weight of Osmium-175)Nuclide mass:174.9152572 u (calculated nuclear mass without electrons)Mass excess:-40.10547 MeVMass defect:1.495584116 u (per nucleus)Nuclear binding energy:1393.12763055 MeV (per nucleus)
7.96072932 MeV (average binding energy per nucleon)Separation energy:S_N = 8.181(16) MeV (first neutron)
S_P = 3.72(3) MeV (first proton)Half-life:1.4(1) minDecay constant λ:0.0082517521495232 s^-1Specific activity α:2.855931826765 × 10⁺¹⁹ Bq g^-1
771873466.6933 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1972

Radioactive Decay

Half-life T_½ = 1.4(1) min (minutes) respectively 8.4 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁷⁵Re	100 %	5.18(3) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁷⁹Pt, ¹⁷⁵Ir.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 99) and isobaric (same nucleon number A = 175) with Osmium-175. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 99	Isobar A = 175
57	¹⁵⁶La
58	¹⁵⁷Ce
59	¹⁵⁸Pr
60	¹⁵⁹Nd
61	¹⁶⁰Pm
62	¹⁶¹Sm
63	¹⁶²Eu
64	¹⁶³Gd
65	¹⁶⁴Tb
66	¹⁶⁵Dy
67	¹⁶⁶Ho	¹⁷⁵Ho
68	¹⁶⁷Er	¹⁷⁵Er
69	¹⁶⁸Tm	¹⁷⁵Tm
70	¹⁶⁹Yb	¹⁷⁵Yb
71	¹⁷⁰Lu	¹⁷⁵Lu
72	¹⁷¹Hf	¹⁷⁵Hf
73	¹⁷²Ta	¹⁷⁵Ta
74	¹⁷³W	¹⁷⁵W
75	¹⁷⁴Re	¹⁷⁵Re
76	¹⁷⁵Os	¹⁷⁵Os
77	¹⁷⁶Ir	¹⁷⁵Ir
78	¹⁷⁷Pt	¹⁷⁵Pt
79	¹⁷⁸Au	¹⁷⁵Au
80	¹⁷⁹Hg	¹⁷⁵Hg
81	¹⁸⁰Tl
82	¹⁸¹Pb