Osmium (Os) Isotopes

Enriched stable Osmium (Os) isotopes:
Nominal mass	Accurate mass	% Natural abundance	Chemical form	Enrichment available %

¹⁸⁴ Os	183.952488 (4)	0.02 (1)	metal	enquire

¹⁸⁶ Os	185.953830 (4)	1.59 (3)	metal	67 - 79+

¹⁸⁷Os	186.955741 (3)	1.96 (2)	metal	70

¹⁸⁸Os	187.955830 (3)	13.24 (8)	metal	86 - 94+

¹⁸⁹Os	188.958137 (4)	16.15 (5)	metal	94 - 95+

¹⁹⁰ Os	189.958436 (4)	26.26 (2)	metal	96 - 97+

¹⁹² Os	191.961467 (4)	40.78 (19)	metal	98 - 99+

Osmium isotopes are used for the production of radioisotopes and in scientific experiments. Os-192 can be used for the production of the medical radioisotope Pt-195m. Os-184 is used for the production of the radioisotope Os-185. Os-191 can be used for the production of the radioisotopes Os-192. Os-190 has been used as a tracer to determine Os abundance in meteorites using isotope dilution ICP-MS. Finally, Os-189 has been used to experiment with nuclear excitation by electronic transition.

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