Plutonium-241m1

Properties and data of the isotope ²⁴¹Pu.

Content

General data

Name of the isotope:Plutonium-241m1; Pu-241m1Symbol: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-241m1)
Excitation energy: 161.6853(9) keVNuclide 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:0.88(5) μsDecay constant λ:787667.2506363 s^-1Specific activity α:1.968233665597 × 10⁺²⁷ Bq g^-1
5.319550447561 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)1/2+

Nuclear Isomers

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

Nuclear Isomer	Excitation Energy	Half-life	Spin
²⁴¹Pu		14.329(29) a	5/2+
^241m2Pu	2200 keV	20.5(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-241m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 147	Isobar A = 241
89	²³⁶Ac
90	²³⁷Th
91	²³⁸Pa
92	²³⁹U	²⁴¹U
93	²⁴⁰Np	²⁴¹Np
94	²⁴¹Pu	²⁴¹Pu
95	²⁴²Am	²⁴¹Am
96	²⁴³Cm	²⁴¹Cm
97	²⁴⁴Bk	²⁴¹Bk
98	²⁴⁵Cf	²⁴¹Cf
99	²⁴⁶Es	²⁴¹Es
100	²⁴⁷Fm	²⁴¹Fm
101	²⁴⁸Md