Platinum-193

Properties and data of the isotope ¹⁹³Pt.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Platinum-193; Pt-193Symbol:¹⁹³Pt or 19378PtMass number A:193 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:115Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.474358974359 (= neutron-proton ratio)Neutron excess (N-Z):37Isotopic mass:192.9629846(15) u (atomic weight of Platinum-193)Nuclide mass:192.9201999 u (calculated nuclear mass without electrons)Mass excess:-34.47962 MeVMass defect:1.643833236 u (per nucleus)Nuclear binding energy:1531.22079633 MeV (per nucleus)
7.93378651 MeV (average binding energy per nucleon)Separation energy:S_N = 6.2625(23) MeV (first neutron)
S_P = 6.9330(4) MeV (first proton)Half-life:50(6) aDecay constant λ:4.395353079010 × 10^-10 s^-1Specific activity α:1378616425570.7 Bq g^-1
37.259903393803 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μ_N) = + 0.603(8)Nuclear g-factor:g_l = 1.206Charge radius:5.4191(27) femtometer fmYear of discovery:1948

Radioactive Decay

Half-life T_½ = 50(6) a respectively 1.577 × 10⁹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC	¹⁹³Ir	100 %	0.0566(19) MeV

Parent Nuclides

Direct parent isotope is: ¹⁹³Au.

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
^193mPt	149.78(4) keV	4.33(3) d	13/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 115) and isobaric (same nucleon number A = 193) with Platinum-193. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 115	Isobar A = 193
70	¹⁸⁵Yb
71	¹⁸⁶Lu
72	¹⁸⁷Hf
73	¹⁸⁸Ta	¹⁹³Ta
74	¹⁸⁹W	¹⁹³W
75	¹⁹⁰Re	¹⁹³Re
76	¹⁹¹Os	¹⁹³Os
77	¹⁹²Ir	¹⁹³Ir
78	¹⁹³Pt	¹⁹³Pt
79	¹⁹⁴Au	¹⁹³Au
80	¹⁹⁵Hg	¹⁹³Hg
81	¹⁹⁶Tl	¹⁹³Tl
82	¹⁹⁷Pb	¹⁹³Pb
83	¹⁹⁸Bi	¹⁹³Bi
84	¹⁹⁹Po	¹⁹³Po
85	²⁰⁰At	¹⁹³At
86	²⁰¹Rn	¹⁹³Rn
87	²⁰²Fr
88	²⁰³Ra
89	²⁰⁴Ac