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Plutonium-241m2

Properties and data of the isotope 241m2Pu.


Contents

See also: list of Plutonium isotopes.

 

General data

Name of the isotope:Plutonium-241m2; Pu-241m2Symbol:241m2Pu or 241m294PuMass 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-241m2)
Excitation energy: 2200 keV
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)
Half-life:20.5(22) μsDecay constant λ:33812.05758829 s-1Specific activity α:8.449003052322 × 10+25 Bq g-1
2.283514338465 × 10+15 Ci g-1
Spin and parity:
(nuclear angular momentum)

 

Radioactive Decay

Half-life T½ = 20.5(22) μs respectively 2.05 × 10-5 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
SZdiv100 %

 

Nuclear Isomers

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

Nuclear IsomerExcitation EnergyHalf-lifeSpin
241Pu14.329(29) a5/2+
241m1Pu161.6853(9) keV0.88(5) μs1/2+

 

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-241m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

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

 


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Last update: 2020-10-23


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