Berkelium-248

Properties and data of the isotope ²⁴⁸Bk.

Contents

General data

Name of the isotope:Berkelium-248; Bk-248Symbol:²⁴⁸Bk or 24897BkMass number A:248 (= number of nucleons)Atomic number Z:97 (= number of protons)Neutrons N:151Isotopic mass:248.07309(8) u (atomic weight of Berkelium-248)Nuclide mass:248.0198853 u (calculated nuclear mass without electrons)Mass excess:68.0829 MeVMass defect:1.99434042 u (per nucleus)Nuclear binding energy:1857.71613519 MeV (per nucleus)
7.49079087 MeV (average binding energy per nucleon)Separation energy:S_N = 5.48(7) MeV (first neutron)
S_P = 4.74(7) MeV (first proton)Half-life:> 9 aDecay constant λ:2.440659086478 × 10^-9 s^-1Specific activity α:5926610003975.5 Bq g^-1
160.17864875609 Ci g^-1Spin and parity:
(nuclear angular momentum)(6+.8-)Year of discovery:1956

Parent Nuclides

Direct parent isotope is: ²⁵²Es.

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
^248mBk	+x keV	23.7(2) h	1(-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 151) and isobaric (same nucleon number A = 248) with Berkelium-248. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 151	Isobar A = 248
92	²⁴³U
93	²⁴⁴Np
94	²⁴⁵Pu
95	²⁴⁶Am	²⁴⁸Am
96	²⁴⁷Cm	²⁴⁸Cm
97	²⁴⁸Bk	²⁴⁸Bk
98	²⁴⁹Cf	²⁴⁸Cf
99	²⁵⁰Es	²⁴⁸Es
100	²⁵¹Fm	²⁴⁸Fm
101	²⁵²Md	²⁴⁸Md
102	²⁵³No
103	²⁵⁴Lr
104	²⁵⁵Rf
105	²⁵⁶Db