Barium-141

Properties and data of the isotope ¹⁴¹Ba.

Content

General data

Name of the isotope:Barium-141; Ba-141Symbol:¹⁴¹Ba or 14156BaMass number A:141 (= number of nucleons)Atomic number Z:56 (= number of protons)Neutrons N:85Isotopic mass:140.914403(6) u (atomic weight of Barium-141)Nuclide mass:140.8836846 u (calculated nuclear mass without electrons)Mass excess:-79.73309 MeVMass defect:1.260316652 u (per nucleus)Nuclear binding energy:1173.97739944 MeV (per nucleus)
8.32608085 MeV (average binding energy per nucleon)Separation energy:S_N = 4.535(9) MeV (first neutron)
S_P = 9.971(10) MeV (first proton)Half-life:18.27(7) minDecay constant λ:0.00063231817237725 s^-1Specific activity α:2.719935073109 × 10⁺¹⁸ Bq g^-1
73511758.732695 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2-Magnetic dipole moment:μ(μ_N) = + 0.337(5)Quadrupole moment Q:+ 0.454(10) barn (100 fm²)Nuclear g-factor:g_l = 0.22466666666667Charge radius:4.8807(69) femtometer fmYear of discovery:1945

Radioactive Decay

Half-life T_½ = 18.27(7) min (minutes) respectively 1.0962 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴¹La	100 %	3.199(7) MeV

Parent Nuclides

Direct parent isotope is: ¹⁴¹Cs.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 85) and isobaric (same nucleon number A = 141) with Barium-141. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 85	Isobar A = 141
47	¹³²Ag
48	¹³³Cd
49	¹³⁴In
50	¹³⁵Sn
51	¹³⁶Sb	¹⁴¹Sb
52	¹³⁷Te	¹⁴¹Te
53	¹³⁸I	¹⁴¹I
54	¹³⁹Xe	¹⁴¹Xe
55	¹⁴⁰Cs	¹⁴¹Cs
56	¹⁴¹Ba	¹⁴¹Ba
57	¹⁴²La	¹⁴¹La
58	¹⁴³Ce	¹⁴¹Ce
59	¹⁴⁴Pr	¹⁴¹Pr
60	¹⁴⁵Nd	¹⁴¹Nd
61	¹⁴⁶Pm	¹⁴¹Pm
62	¹⁴⁷Sm	¹⁴¹Sm
63	¹⁴⁸Eu	¹⁴¹Eu
64	¹⁴⁹Gd	¹⁴¹Gd
65	¹⁵⁰Tb	¹⁴¹Tb
66	¹⁵¹Dy	¹⁴¹Dy
67	¹⁵²Ho	¹⁴¹Ho
68	¹⁵³Er
69	¹⁵⁴Tm
70	¹⁵⁵Yb
71	¹⁵⁶Lu
72	¹⁵⁷Hf
73	¹⁵⁸Ta
74	¹⁵⁹W
75	¹⁶⁰Re
76	¹⁶¹Os