Isotopes of plutonium

Isotope data
plutonium symbol icon

Naturally occurring isotopes

This table shows information about naturally occuring isotopes, their atomic masses, their natural abundances, their nuclear spins, and their magnetic moments. Further data for radioisotopes (radioactive isotopes) of plutonium are listed (including any which occur naturally) below.
Isotope Atomic mass (ma/u) Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
nil

Isotopic abundances of Pu
In the above picture, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. This is not to be confused with the relative percentage isotope abundances which total 100% for all the naturally occurring isotopes.

Radiosotope data

Further data for naturally occuring isotopes of plutonium are listed above. This table gives information about some radiosotopes of plutonium, their masses, their half-lives, their modes of decay, their nuclear spins, and their nuclear magnetic moments.
Isotope Mass Half-life Mode of decay Nuclear spin Nuclear magnetic moment
236Pu 236.04605 2.87 y α to 232U; SF 0
237Pu 237.04840 45.7 d EC to 237Np; α to 232U 7/2
238Pu 238.04955 87.74 y α to 234U; SF 0
239Pu 239.05216 24110 y α to 235U; SF 1/2 0.203
240Pu 240.05381 6537 y α to 236U; SF 0
241Pu 241.05684 14.4 y α to 237U; SF; β- to 241Am 5/2 -0.683
242Pu 242.05874 3.76 x 105 y α to 238U; SF 0
243Pu 243.06200 4.956 h β- to 243Am 7/2
244Pu 244.064199 (5) 8.2 x 107 y α to 240U; SF 0
245Pu 245.06774 10.5 h β- to 245Am 9/2
246Pu 246.07020 10.85 d β- to 246Am 0

Sheffield ChemPuter isotope pattern calculator

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References

  1. Naturally occurring isotope abundances: Commission on Atomic Weights and Isotopic Abundances report for the International Union of Pure and Applied Chemistry in Isotopic Compositions of the Elements 1989, Pure and Applied Chemistry, 1998, 70, 217. [Copyright 1998 IUPAC]
  2. Masses, nuclear spins, and magnetic moments: I. Mills, T. Cvitas, K. Homann, N. Kallay, and K. Kuchitsu in Quantities, Units and Symbols in Physical Chemistry, Blackwell Scientific Publications, Oxford, UK, 1988. [Copyright 1988 IUPAC]
  3. For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute) Table of the Nuclides

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