Platinum-183

Properties and data of the isotope ¹⁸³Pt.

Content

General data

Name of the isotope:Platinum-183; Pt-183Symbol:¹⁸³Pt or 18378PtMass number A:183 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:105Isotopic mass:182.961597(17) u (atomic weight of Platinum-183)Nuclide mass:182.9188123 u (calculated nuclear mass without electrons)Mass excess:-35.77216 MeVMass defect:1.558571676 u (per nucleus)Nuclear binding energy:1451.80016476 MeV (per nucleus)
7.93333423 MeV (average binding energy per nucleon)Separation energy:S_N = 7.675(20) MeV (first neutron)
S_P = 4.010(26) MeV (first proton)Half-life:6.5(10) minDecay constant λ:0.0017773004629742 s^-1Specific activity α:5.880853702451 × 10⁺¹⁸ Bq g^-1
158941991.95815 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μ_N) = + 0.521(27)Nuclear g-factor:g_l = 1.042Charge radius:5.4038(36) femtometer fmYear of discovery:1963

Radioactive Decay

Half-life T_½ = 6.5(10) min (minutes) respectively 3.90 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷⁹Os	0.0096(5) %	4.822(9) MeV
EE/β⁺	¹⁸³Ir	99.9904 %	4.431(29) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁸⁷Hg, ¹⁸³Au.

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
^183mPt	34.74(7) keV	43(5) s	(7/2)-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 105) and isobaric (same nucleon number A = 183) with Platinum-183. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 105	Isobar A = 183
63	¹⁶⁸Eu
64	¹⁶⁹Gd
65	¹⁷⁰Tb
66	¹⁷¹Dy
67	¹⁷²Ho
68	¹⁷³Er
69	¹⁷⁴Tm
70	¹⁷⁵Yb	¹⁸³Yb
71	¹⁷⁶Lu	¹⁸³Lu
72	¹⁷⁷Hf	¹⁸³Hf
73	¹⁷⁸Ta	¹⁸³Ta
74	¹⁷⁹W	¹⁸³W
75	¹⁸⁰Re	¹⁸³Re
76	¹⁸¹Os	¹⁸³Os
77	¹⁸²Ir	¹⁸³Ir
78	¹⁸³Pt	¹⁸³Pt
79	¹⁸⁴Au	¹⁸³Au
80	¹⁸⁵Hg	¹⁸³Hg
81	¹⁸⁶Tl	¹⁸³Tl
82	¹⁸⁷Pb	¹⁸³Pb
83	¹⁸⁸Bi
84	¹⁸⁹Po
85	¹⁹⁰At