Curium-245
Properties and data of the isotope 245Cm.
See also: list of Curium isotopes.
General data
Name of the isotope:Curium-245; Cm-245Symbol:245Cm or 24596CmMass number A:245 (= number of nucleons)Atomic number Z:96 (= number of protons)Neutrons N:149Isotopic mass:245.0654911(12) u (atomic weight of Curium-245)Nuclide mass:245.0128348 u (calculated nuclear mass without electrons)Mass excess:61.00457 MeVMass defect:1.976784456 u (per nucleus)Nuclear binding energy:1841.36286006 MeV (per nucleus)
7.51576678 MeV (average binding energy per nucleon)Separation energy:SN = 5.5186(5) MeV (first neutron)
SP = 6.1636(11) MeV (first proton)Half-life:8423(74) aDecay constant λ:2.60944614900 × 10-12 s-1Specific activity α:6414062153.3559 Bq g-1
0.17335303117178 Ci g-1Spin and parity:
(nuclear angular momentum)7/2+Magnetic dipole moment:μ(μN) = 0.40(8)Nuclear g-factor:gl = 0.11428571428571Charge radius:5.8475(182) femtometer fmYear of discovery:1954
Radioactive Decay
Half-life T½ = 8423(74) a respectively 2.6563 × 1011 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
α | 241Pu | ca. 100 % | 5.6245(5) MeV | |
SZ | div | trace | | |
Parent Nuclides
Direct parent isotopes are: 249Cf, 245Bk, 245Am.
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 |
---|
245mCm | 355.92(10) keV | 0.29(2) μs | 1/2+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 149) and isobaric (same nucleon number A = 245) with Curium-245. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 149 | Isobar A = 245 |
91 | 240Pa | |
92 | 241U | |
93 | 242Np | |
94 | 243Pu | 245Pu |
95 | 244Am | 245Am |
96 | 245Cm | 245Cm |
97 | 246Bk | 245Bk |
98 | 247Cf | 245Cf |
99 | 248Es | 245Es |
100 | 249Fm | 245Fm |
101 | 250Md | 245Md |
102 | 251No | |
103 | 252Lr | |
104 | 253Rf | |
External data and identifiers
Last update: 2020-10-23
Perma link: https://www.chemlin.org/isotope/curium-245
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