Osmium-160m

Properties and data of the isotope ^160mOs.

Contents

General Data

Radioactive Decay

Isotones und Isobares

Literature

Osmium-160m is a nuclear isomer of the isotope Osmium-160.

General data

Name of the isotope:Osmium-160m; Os-160mSymbol:^160mOs or 160m76OsMass number A:160 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:84Isotopic mass:160 u (atomic weight of Osmium-160m)
Excitation energy: 1844(18) keVNuclide mass:159.9583122 u (calculated nuclear mass without electrons)Mass excess:0 MeVMass defect:1.322555376 u (per nucleus)Nuclear binding energy:1231.95239741 MeV (per nucleus)
7.69970248 MeV (average binding energy per nucleon)Half-life:41 μsDecay constant λ:16906.028794145 s^-1Specific activity α:6.363155423780 × 10⁺²⁵ Bq g^-1
1.719771736156 × 10⁺¹⁵ Ci g^-1Spin and parity:
(nuclear angular momentum)8+Year of discovery:2023

Radioactive Decay

Osmium-160m decays by emitting an alpha particle and with a half-life of 41+15-9 μs to Tungsten-156.

Half-life T_½ = 41 μs respectively 4.1 × 10^-5 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁵⁶W		8.890(10) MeV

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
¹⁶⁰Os		97 μs	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 84) and isobaric (same nucleon number A = 160) with Osmium-160m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 84	Isobar A = 160
47	¹³¹Ag
48	¹³²Cd
49	¹³³In
50	¹³⁴Sn
51	¹³⁵Sb
52	¹³⁶Te
53	¹³⁷I
54	¹³⁸Xe
55	¹³⁹Cs
56	¹⁴⁰Ba
57	¹⁴¹La
58	¹⁴²Ce
59	¹⁴³Pr	¹⁶⁰Pr
60	¹⁴⁴Nd	¹⁶⁰Nd
61	¹⁴⁵Pm	¹⁶⁰Pm
62	¹⁴⁶Sm	¹⁶⁰Sm
63	¹⁴⁷Eu	¹⁶⁰Eu
64	¹⁴⁸Gd	¹⁶⁰Gd
65	¹⁴⁹Tb	¹⁶⁰Tb
66	¹⁵⁰Dy	¹⁶⁰Dy
67	¹⁵¹Ho	¹⁶⁰Ho
68	¹⁵²Er	¹⁶⁰Er
69	¹⁵³Tm	¹⁶⁰Tm
70	¹⁵⁴Yb	¹⁶⁰Yb
71	¹⁵⁵Lu	¹⁶⁰Lu
72	¹⁵⁶Hf	¹⁶⁰Hf
73	¹⁵⁷Ta	¹⁶⁰Ta
74	¹⁵⁸W	¹⁶⁰W
75	¹⁵⁹Re	¹⁶⁰Re
76	¹⁶⁰Os	¹⁶⁰Os