Curium-241
Properties and data of the isotope 241Cm.
See also: list of Curium isotopes.
General data
Name of the isotope:Curium-241; Cm-241Symbol:241Cm or 24196CmMass number A:241 (= number of nucleons)Atomic number Z:96 (= number of protons)Neutrons N:145Isotopic mass:241.0576512(17) u (atomic weight of Curium-241)Nuclide mass:241.0049949 u (calculated nuclear mass without electrons)Mass excess:53.70175 MeVMass defect:1.949964692 u (per nucleus)Nuclear binding energy:1816.38041081 MeV (per nucleus)
7.53684818 MeV (average binding energy per nucleon)Separation energy:SN = 6.0938(21) MeV (first neutron)
SP = 5.097(14) MeV (first proton)Half-life:32.8(2) dDecay constant λ:2.445895369523 × 10-6 s-1Specific activity α:6.111836698728 × 10+15 Bq g-1
165184.77564132 Ci g-1Spin and parity:
(nuclear angular momentum)1/2+Year of discovery:1952
Radioactive Decay
Half-life T½ = 32.8(2) d respectively 2.83392 × 105 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
α | 237Pu | 1.0(1) % | 6.1852(6) MeV | |
EC | 241Am | 99.0(1) % | 0.7674(12) MeV | |
Parent Nuclides
Direct parent isotopes are: 245Cf, 241Bk.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 145) and isobaric (same nucleon number A = 241) with Curium-241. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 145 | Isobar A = 241 |
87 | 232Fr | |
88 | 233Ra | |
89 | 234Ac | |
90 | 235Th | |
91 | 236Pa | |
92 | 237U | 241U |
93 | 238Np | 241Np |
94 | 239Pu | 241Pu |
95 | 240Am | 241Am |
96 | 241Cm | 241Cm |
97 | 242Bk | 241Bk |
98 | 243Cf | 241Cf |
99 | 244Es | 241Es |
100 | 245Fm | 241Fm |
101 | 246Md | |
External data and identifiers
CAS:15411-91-3InChI Key:NIWWFAAXEMMFMS-VENIDDJXSA-NSMILES:[241Cm]PubChem:ID 167286Adopted Levels, Gammas:NuDat 241Cm
Last update: 2023-04-15
Perma link: https://www.chemlin.org/isotope/curium-241
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