Platinum-174

Properties and data of the isotope ¹⁷⁴Pt.

Content

General data

Name of the isotope:Platinum-174; Pt-174Symbol:¹⁷⁴Pt or 17478PtMass number A:174 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:96Isotopic mass:173.972820(11) u (atomic weight of Platinum-174)Nuclide mass:173.9300353 u (calculated nuclear mass without electrons)Mass excess:-25.31801 MeVMass defect:1.469364432 u (per nucleus)Nuclear binding energy:1368.70415222 MeV (per nucleus)
7.86611582 MeV (average binding energy per nucleon)Separation energy:S_N = 11.45(6) MeV (first neutron)
S_P = 2.339(15) MeV (first proton)Half-life:889(17) msDecay constant λ:0.77969311649038 s^-1Specific activity α:2.714116632964 × 10⁺²¹ Bq g^-1
73354503593.627 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1966

Radioactive Decay

Half-life T_½ = 889(17) ms respectively 8.89 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷⁰Os	76(8) %	6.183(3) MeV
EE/β⁺	¹⁷⁴Ir	24(8) %	5.545(26) MeV

Parent Nuclides

Direct parent isotope is: ¹⁷⁸Hg.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 96) and isobaric (same nucleon number A = 174) with Platinum-174. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 96	Isobar A = 174
55	¹⁵¹Cs
56	¹⁵²Ba
57	¹⁵³La
58	¹⁵⁴Ce
59	¹⁵⁵Pr
60	¹⁵⁶Nd
61	¹⁵⁷Pm
62	¹⁵⁸Sm
63	¹⁵⁹Eu
64	¹⁶⁰Gd
65	¹⁶¹Tb
66	¹⁶²Dy	¹⁷⁴Dy
67	¹⁶³Ho	¹⁷⁴Ho
68	¹⁶⁴Er	¹⁷⁴Er
69	¹⁶⁵Tm	¹⁷⁴Tm
70	¹⁶⁶Yb	¹⁷⁴Yb
71	¹⁶⁷Lu	¹⁷⁴Lu
72	¹⁶⁸Hf	¹⁷⁴Hf
73	¹⁶⁹Ta	¹⁷⁴Ta
74	¹⁷⁰W	¹⁷⁴W
75	¹⁷¹Re	¹⁷⁴Re
76	¹⁷²Os	¹⁷⁴Os
77	¹⁷³Ir	¹⁷⁴Ir
78	¹⁷⁴Pt	¹⁷⁴Pt
79	¹⁷⁵Au	¹⁷⁴Au
80	¹⁷⁶Hg	¹⁷⁴Hg
81	¹⁷⁷Tl
82	¹⁷⁸Pb