Berkelium-241

Properties and data of the isotope ²⁴¹Bk.

Content

General data

Name of the isotope:Berkelium-241; Bk-241Symbol:²⁴¹Bk or 24197BkMass number A:241 (= number of nucleons)Atomic number Z:97 (= number of protons)Neutrons N:144Isotopic mass:241.06015(21) u (atomic weight of Berkelium-241)Nuclide mass:241.0069453 u (calculated nuclear mass without electrons)Mass excess:56.02936 MeVMass defect:1.946626008 u (per nucleus)Nuclear binding energy:1813.2704467 MeV (per nucleus)
7.52394376 MeV (average binding energy per nucleon)Separation energy:S_N = 7.70(25) MeV (first neutron)
S_P = 2.98(20) MeV (first proton)Half-life:4.6(4) minDecay constant λ:0.0025114028281157 s^-1Specific activity α:6.275527629442 × 10⁺¹⁸ Bq g^-1
169608854.8498 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2+)Year of discovery:2003

Radioactive Decay

Half-life T_½ = 4.6(4) min (minutes) respectively 2.76 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	²⁴¹Cm	?	2.33(20) MeV
α	²³⁷Am	?	7.04(21) MeV

Parent Nuclides

Direct parent isotope is: ²⁴⁵Es.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 144) and isobaric (same nucleon number A = 241) with Berkelium-241. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 144	Isobar A = 241
85	²²⁹At
86	²³⁰Rn
87	²³¹Fr
88	²³²Ra
89	²³³Ac
90	²³⁴Th
91	²³⁵Pa
92	²³⁶U	²⁴¹U
93	²³⁷Np	²⁴¹Np
94	²³⁸Pu	²⁴¹Pu
95	²³⁹Am	²⁴¹Am
96	²⁴⁰Cm	²⁴¹Cm
97	²⁴¹Bk	²⁴¹Bk
98	²⁴²Cf	²⁴¹Cf
99	²⁴³Es	²⁴¹Es
100	²⁴⁴Fm	²⁴¹Fm
101	²⁴⁵Md