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Plutonium-241

Properties and data of the isotope 241Pu.


Content

See also: list of Plutonium isotopes.

 

General data

Name of the isotope:Plutonium-241; Pu-241Symbol:241Pu or 24194PuMass number A:241 (= number of nucleons)Atomic number Z:94 (= number of protons)Neutrons N:147Isotopic mass:241.0568497(12) u (atomic weight of Plutonium-241)Nuclide mass:241.0052902 u (calculated nuclear mass without electrons)Mass excess:52.95515 MeVMass defect:1.95244596 u (per nucleus)Nuclear binding energy:1818.69169706 MeV (per nucleus)
7.54643858 MeV (average binding energy per nucleon)
Separation energy:SN = 5.24152(3) MeV (first neutron)
SP = 6.65(17) MeV (first proton)
Half-life:14.329(29) aDecay constant λ:1.533920923280 × 10-9 s-1Specific activity α:3832982517842.5 Bq g-1
103.59412210385 Ci g-1
Spin and parity:
(nuclear angular momentum)
5/2+Magnetic dipole moment:μ(μN) = - 0.683(15)Quadrupole moment Q:+6(2) barn (100 fm2)Nuclear g-factor:gl = -0.2732Charge radius:5.8748(379) femtometer fmYear of discovery:1949

 

Radioactive Decay

Half-life T½ = 14.329(29) a respectively 4.51879344 × 108 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
α237Utrace5.1401(5) MeV
SZdivtrace
β-241Am99.998 %0,02078(17) MeV

 

Parent Nuclides

Direct parent isotopes are: 241Np, 245Cm.

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
241m1Pu161.6853(9) keV0.88(5) μs1/2+
241m2Pu2200 keV20.5(22) μs

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 147) and isobaric (same nucleon number A = 241) with Plutonium-241. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 147Isobar A = 241
89236Ac
90237Th
91238Pa
92239U241U
93240Np241Np
94241Pu241Pu
95242Am241Am
96243Cm241Cm
97244Bk241Bk
98245Cf241Cf
99246Es241Es
100247Fm241Fm
101248Md

 

External data and identifiers

Adopted Levels, Gammas:NuDat 241Pu

 


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Last update: 2020-10-23


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