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Isotopes of platinum

From Wikipedia, the free encyclopedia

Isotopes ofplatinum (78Pt)
Main isotopes[1]Decay
abun­dancehalf-life(t1/2)modepro­duct
190Pt0.0120%4.83×1011 yα186Os
192Pt0.782%stable
193Ptsynth50 yε193Ir
194Pt32.9%stable
195Pt33.8%stable
196Pt25.2%stable
198Pt7.36%stable
Standard atomic weightAr°(Pt)

Naturally occurringplatinum (78Pt) consists of fivestableisotopes (192Pt,194Pt,195Pt,196Pt,198Pt) and one very long-lived (half-life 4.83×1011 years)radioisotope (190Pt). There are also 34 knownsynthetic radioisotopes, the longest-lived of which is193Pt with a half-life of 50 years. All other isotopes have half-lives under a year, most under a day. All isotopes of platinum are either radioactive orobservationally stable, meaning that they are predicted to be radioactive but no actual decay has been observed. Platinum-195 is the most abundant isotope, making platinum one of the only three elements to have its most abundant isotope with anodd neutron number (the other two beingberyllium andnitrogen).

List of isotopes

[edit]


Nuclide
[n 1]
ZNIsotopic mass(Da)[4]
[n 2][n 3]
Half-life[1]
[n 4]
Decay
mode
[1]
[n 5]
Daughter
isotope

[n 6][n 7]
Spin and
parity[1]
[n 8][n 9]
Natural abundance(mole fraction)
Excitation energy[n 9]Normal proportion[1]Range of variation
165Pt7887164.99966(43)#370(180) μsα161Os7/2−#
166Pt7888165.99487(32)#294(62) μsα162Os0+
167Pt7889166.99275(33)#920(120) μsα163Os7/2−#
168Pt7890167.98818(16)2.02(10) msα164Os0+
β+ ?168Ir
169Pt7891168.98662(22)#6.99(9) msα165Os(7/2−)
β+ ?169Ir
170Pt7892169.982502(20)13.93(16) msα166Os0+
β+ ?170Ir
171Pt7893170.981249(87)45.5(25) msα (86%)167Os7/2−
β+ (14%)171Ir
171mPt412.6(10) keV901(9) nsIT171Pt13/2+
172Pt7894171.977341(11)97.6(13) msα (96%)168Os0+
β+ (4%)172Ir
173Pt7895172.976450(68)382(2) msα (86%)169Os(5/2−)
β+ (14%)173Ir
174Pt7896173.972820(11)862(8) msα (74.9%)170Os0+
β+ (25.1%)174Ir
175Pt7897174.972401(20)2.43(4) sα (64%)171Os(7/2−)
β+ (36%)175Ir
176Pt7898175.968938(14)6.33(15) sβ+ (60%)176Ir0+
α (40%)172Os
177Pt7899176.968470(16)10.0(04) sβ+ (94.3%)177Ir5/2−
α (5.7%)173Os
177mPt147.5(4) keV2.35(4) μsIT177Pt1/2−
178Pt78100177.965649(11)20.7(7) sβ+ (92.3%)178Ir0+
α (7.7%)174Os
179Pt78101178.9653588(86)21.2(4) sβ+ (99.76%)179Ir1/2−
α (0.24%)175Os
180Pt78102179.963038(11)56(3) sβ+ (99.48%)180Ir0+
α (0.52%)176Os
181Pt78103180.963090(15)52.0(22) sβ+ (99.93%)181Ir1/2−
α (0.074%)177Os
181mPt116.65(8) keV>300 nsIT181Pt7/2−
182Pt78104181.961172(14)2.67(12) minβ+ (99.962%)182Ir0+
α (0.038%)178Os
183Pt78105182.961596(15)6.5(10) minβ+ (99.99%)183Ir1/2−
α (0.0096%)179Os
183m1Pt34.74(7) keV43(5) sβ+ (96.9%)183Ir7/2−
IT (3.1%)183Pt
α ?179Os
183m2Pt195.90(10) keV>150 nsIT183Pt9/2+
184Pt78106183.959922(16)17.3(2) minβ+184Ir0+
α (0.0017%)180Os
184mPt1840.3(8) keV1.01(5) msIT184Pt8−
185Pt78107184.960614(28)70.9(24) minβ+185Ir9/2+
α (0.0050%)181Os
185m1Pt103.41(5) keV33.0(8) minβ+185Ir1/2−
185m2Pt200.89(4) keV728(20) nsIT185Pt5/2−
186Pt78108185.959351(23)2.08(5) hβ+186Ir0+
α (1.4×10−4%)182Os
187Pt78109186.960617(26)2.35(3) hβ+187Ir3/2−
187mPt174.38(22) keV311(15) μsIT187Pt11/2+
188Pt78110187.9593975(57)10.16(18) dEC188Ir0+
α (2.6×10−5%)184Os
189Pt78111188.960848(11)10.87(12) hβ+189Ir3/2−
189m1Pt172.79(6) keV464(25) nsIT189Pt9/2−
189m2Pt191.6(4) keV143(5) μsIT189Pt(13/2+)
190Pt78112189.95994982(71)4.83(3)×1011 yα[n 10]186Os0+1.2(2)×10−4
191Pt78113190.9616763(44)2.83(2) dEC191Ir3/2−
191m1Pt100.663(20) keV>1 μsIT191Pt9/2−
191m2Pt149.035(22) keV95(5) μsIT191Pt13/2+
192Pt78114191.9610427(28)Observationally Stable[n 11]0+0.00782(24)
192mPt2172.37(13) keV272(23) nsIT192Pt10−
193Pt78115192.9629845(15)50(6) yEC193Ir1/2−
193mPt149.78(4) keV4.33(3) dIT193Pt13/2+
194Pt78116193.96268350(53)Observationally Stable[n 12]0+0.3286(41)
195Pt78117194.96479433(54)Observationally Stable[n 13]1/2−0.3378(24)
195mPt259.077(23) keV4.010(5) dIT195Pt13/2+
196Pt78118195.96495465(55)Observationally Stable[n 14]0+0.2521(34)
197Pt78119196.96734303(58)19.8915(19) hβ197Au1/2−
197mPt399.59(20) keV95.41(18) minIT (96.7%)197Pt13/2+
β (3.3%)197Au
198Pt78120197.9678967(23)Observationally Stable[n 15]0+0.0734(13)
199Pt78121198.9705970(23)30.80(21) minβ199Au5/2−
199mPt424(2) keV13.48(16) sIT199Pt13/2+
200Pt78122199.971445(22)12.6(3) hβ200Au0+
201Pt78123200.974513(54)2.5(1) minβ201Au(5/2−)
202Pt78124201.975639(27)44(15) hβ202Au0+
202mPt1788.5(4) keV141(7) μsIT202Pt(7−)
203Pt78125202.97906(22)#22(4) sβ203Au(1/2−)
203m1Pt1367(3)# keV12(5) sβ203Au13/2+#
IT ?203Pt
203m2Pt1420(50)# keV>100# nsIT203Pt27/2−#
203m3Pt2530(50)# keV641(55) nsIT203Pt33/2+#
204Pt78126203.98108(22)#10.3(14) sβ204Au0+
204m1Pt1995.1(07) keV5.5(7) μsIT204Pt(5−)
204m2Pt2035(23) keV55(3) μsIT204Pt(7−)
204m3Pt3193(23) keV146(14) nsIT204Pt(10+)
205Pt78127204.98624(32)#2# sβ ?205Au9/2+#
206Pt78128205.99008(32)#500# msβ ?206Au0+
βn ?205Au
207Pt78129206.99556(43)#600# msβ ?207Au9/2+#
βn ?206Au
208Pt78130207.99946(43)#220# msβ ?208Au0+
βn ?207Au
This table header & footer:
  1. ^mPt – Excitednuclear isomer.
  2. ^( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
  3. ^# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
  4. ^Bold half-life – nearly stable, half-life longer thanage of universe.
  5. ^Modes of decay:
    EC:Electron capture


    IT:Isomeric transition
  6. ^Bold italics symbol as daughter – Daughter product is nearly stable.
  7. ^Bold symbol as daughter – Daughter product is stable.
  8. ^( ) spin value – Indicates spin with weak assignment arguments.
  9. ^ab# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
  10. ^Theorized to also undergo β+β+ decay to190Os
  11. ^Believed to undergo α decay to188Os with a half-life over 6.0×1016 years
  12. ^Believed to undergo α decay to190Os
  13. ^Believed to undergo α decay to191Os with a half-life over 6.3×1018 years
  14. ^Believed to undergo α decay to192Os
  15. ^Believed to undergo α decay to194Os or double β decay to198Hg with a half-life over 3.20×1014 years

See also

[edit]

Daughter products other than platinum

References

[edit]
  1. ^abcdeKondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021)."The NUBASE2020 evaluation of nuclear properties"(PDF).Chinese Physics C.45 (3): 030001.doi:10.1088/1674-1137/abddae.
  2. ^"Standard Atomic Weights: Platinum".CIAAW. 2005.
  3. ^Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04)."Standard atomic weights of the elements 2021 (IUPAC Technical Report)".Pure and Applied Chemistry.doi:10.1515/pac-2019-0603.ISSN 1365-3075.
  4. ^Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*".Chinese Physics C.45 (3): 030003.doi:10.1088/1674-1137/abddaf.


Group12 3456789101112131415161718
PeriodHydrogen and
alkali metals
Alkaline
earth metals
Pnicto­gensChal­co­gensHalo­gensNoble gases
12
345678910
1112131415161718
192021222324252627282930313233343536
373839404142434445464748495051525354
55561 asterisk71727374757677787980818283848586
87881 asterisk103104105106107108109110111112113114115116117118
119120
1 asterisk5758596061626364656667686970 
1 asterisk8990919293949596979899100101102
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