Barium-148

Properties and data of the isotope ¹⁴⁸Ba.

Content

General data

Name of the isotope:Barium-148; Ba-148Symbol:¹⁴⁸Ba or 14856BaMass number A:148 (= number of nucleons)Atomic number Z:56 (= number of protons)Neutrons N:92Isotopic mass:147.93817(7) u (atomic weight of Barium-148)Nuclide mass:147.9074516 u (calculated nuclear mass without electrons)Mass excess:-57.59427 MeVMass defect:1.297204064 u (per nucleus)Nuclear binding energy:1208.33780239 MeV (per nucleus)
8.16444461 MeV (average binding energy per nucleon)Separation energy:S_N = 5.40(7) MeV (first neutron)
S_P = 12.96(6) MeV (first proton)Half-life:612(17) msDecay constant λ:1.1325934322875 s^-1Specific activity α:4.639889242363 × 10⁺²¹ Bq g^-1
125402411955.77 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.9731(167) femtometer fmYear of discovery:1979

Radioactive Decay

Half-life T_½ = 612(17) ms respectively 6.12 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴⁸La	< 100 %	5.11(6) MeV
β^-, n	¹⁴⁷La	0.4(3) %	1.01(6) MeV

Parent Nuclides

Direct parent isotope is: ¹⁴⁸Cs.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 92) and isobaric (same nucleon number A = 148) with Barium-148. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 92	Isobar A = 148
53	¹⁴⁵I
54	¹⁴⁶Xe	¹⁴⁸Xe
55	¹⁴⁷Cs	¹⁴⁸Cs
56	¹⁴⁸Ba	¹⁴⁸Ba
57	¹⁴⁹La	¹⁴⁸La
58	¹⁵⁰Ce	¹⁴⁸Ce
59	¹⁵¹Pr	¹⁴⁸Pr
60	¹⁵²Nd	¹⁴⁸Nd
61	¹⁵³Pm	¹⁴⁸Pm
62	¹⁵⁴Sm	¹⁴⁸Sm
63	¹⁵⁵Eu	¹⁴⁸Eu
64	¹⁵⁶Gd	¹⁴⁸Gd
65	¹⁵⁷Tb	¹⁴⁸Tb
66	¹⁵⁸Dy	¹⁴⁸Dy
67	¹⁵⁹Ho	¹⁴⁸Ho
68	¹⁶⁰Er	¹⁴⁸Er
69	¹⁶¹Tm	¹⁴⁸Tm
70	¹⁶²Yb	¹⁴⁸Yb
71	¹⁶³Lu
72	¹⁶⁴Hf
73	¹⁶⁵Ta
74	¹⁶⁶W
75	¹⁶⁷Re
76	¹⁶⁸Os
77	¹⁶⁹Ir
78	¹⁷⁰Pt
79	¹⁷¹Au
80	¹⁷²Hg