About   |   More   |   Search
ChemLin Logo

Protactinium-232

Properties and data of the isotope 232Pa.


Contents

See also: list of Protactinium isotopes.

 

General data

Name of the isotope:Protactinium-232; Pa-232Symbol:232Pa or 23291PaMass number A:232 (= number of nucleons)Atomic number Z:91 (= number of protons)Neutrons N:141Isotopic mass:232.038590(8) u (atomic weight of Protactinium-232)Nuclide mass:231.9886757 u (calculated nuclear mass without electrons)Mass excess:35.94635 MeVMass defect:1.895241068 u (per nucleus)Nuclear binding energy:1765.4056834 MeV (per nucleus)
7.60950726 MeV (average binding energy per nucleon)
Separation energy:SN = 5.549(8) MeV (first neutron)
SP = 5.158(8) MeV (first proton)
Half-life:1.32(2) dDecay constant λ:6.077679403057 × 10-6 s-1Specific activity α:1.577613856325 × 10+16 Bq g-1
426382.12333122 Ci g-1
Spin and parity:
(nuclear angular momentum)
(2-)Year of discovery:1949

 

Radioactive Decay

Half-life T½ = 1.32(2) d respectively 1.14048 × 105 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
β-232Uca. 100 %1.337(7) MeV
EC232Th?0.500(8) MeV

 

Parent Nuclides

Direct parent isotope is: 236Np.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 141) and isobaric (same nucleon number A = 232) with Protactinium-232. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 141Isobar A = 232
83224Bi
84225Po
85226At
86227Rn
87228Fr232Fr
88229Ra232Ra
89230Ac232Ac
90231Th232Th
91232Pa232Pa
92233U232U
93234Np232Np
94235Pu232Pu
95236Am232Am
96237Cm232Cm
97238Bk
98239Cf
99240Es
100241Fm

 

External data and identifiers

CAS:15766-06-0InChI Key:XLROVYAPLOFLNU-OUBTZVSYSA-NSMILES:[232Pa]PubChem:ID 177679Adopted Levels, Gammas:NuDat 232Pa

 


More Chemistry

isotopes

Social Media

Facebook

LinkedIn

Twitter


Last update: 2021-03-15


© 1996 - 2025 ChemLin