Platinum-168

Properties and data of the isotope ¹⁶⁸Pt.

Contents

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

General data

Name of the isotope:Platinum-168; Pt-168Symbol:¹⁶⁸Pt or 16878PtMass number A:168 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:90Isotopic mass:167.98818(16) u (atomic weight of Platinum-168)Nuclide mass:167.9453953 u (calculated nuclear mass without electrons)Mass excess:-11.01026 MeVMass defect:1.402014936 u (per nucleus)Nuclear binding energy:1305.96850079 MeV (per nucleus)
7.77362203 MeV (average binding energy per nucleon)Separation energy:S_N = 12.47(34) MeV (first neutron)
S_P = 1.22(15) MeV (first proton)Half-life:2.02(10) msDecay constant λ:343.14216859403 s^-1Specific activity α:1.237395493567 × 10⁺²⁴ Bq g^-1
33443121447765 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1981

Radioactive Decay

Half-life T_½ = 2.02(10) ms respectively 2.02 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁶⁴Os	ca. 100 %	6.99(3) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 90) and isobaric (same nucleon number A = 168) with Platinum-168. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 90	Isobar A = 168
50	¹⁴⁰Sn
51	¹⁴¹Sb
52	¹⁴²Te
53	¹⁴³I
54	¹⁴⁴Xe
55	¹⁴⁵Cs
56	¹⁴⁶Ba
57	¹⁴⁷La
58	¹⁴⁸Ce
59	¹⁴⁹Pr
60	¹⁵⁰Nd
61	¹⁵¹Pm
62	¹⁵²Sm
63	¹⁵³Eu	¹⁶⁸Eu
64	¹⁵⁴Gd	¹⁶⁸Gd
65	¹⁵⁵Tb	¹⁶⁸Tb
66	¹⁵⁶Dy	¹⁶⁸Dy
67	¹⁵⁷Ho	¹⁶⁸Ho
68	¹⁵⁸Er	¹⁶⁸Er
69	¹⁵⁹Tm	¹⁶⁸Tm
70	¹⁶⁰Yb	¹⁶⁸Yb
71	¹⁶¹Lu	¹⁶⁸Lu
72	¹⁶²Hf	¹⁶⁸Hf
73	¹⁶³Ta	¹⁶⁸Ta
74	¹⁶⁴W	¹⁶⁸W
75	¹⁶⁵Re	¹⁶⁸Re
76	¹⁶⁶Os	¹⁶⁸Os
77	¹⁶⁷Ir	¹⁶⁸Ir
78	¹⁶⁸Pt	¹⁶⁸Pt