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Curium-241

Properties and data of the isotope 241Cm.


Content

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-1
Spin 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 modeDaughterProbabilityDecay energyγ energy
(intensity)
α237Pu1.0(1) %6.1852(6) MeV
EE241Am99.0(1) %0.7674(12) MeV

 

Curium-241 decay chain

 

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.

 

OZIsotone N = 145Isobar A = 241
87232Fr
88233Ra
89234Ac
90235Th
91236Pa
92237U241U
93238Np241Np
94239Pu241Pu
95240Am241Am
96241Cm241Cm
97242Bk241Bk
98243Cf241Cf
99244Es241Es
100245Fm241Fm
101246Md

 

External data and identifiers

CAS:15411-91-3InChI Key:NIWWFAAXEMMFMS-VENIDDJXSA-NSMILES:[241Cm]PubChem:ID 167286Adopted Levels, Gammas:NuDat 241Cm

 


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Last update: 2023-04-15


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