Barium-145
Properties and data of the isotope 145Ba.
See also: list of Barium isotopes.
General data
Name of the isotope:Barium-145; Ba-145Symbol:145Ba or 14556BaMass number A:145 (= number of nucleons)Atomic number Z:56 (= number of protons)Neutrons N:89Isotopic mass:144.92763(8) u (atomic weight of Barium-145)Nuclide mass:144.8969116 u (calculated nuclear mass without electrons)Mass excess:-67.41222 MeVMass defect:1.281749316 u (per nucleus)Nuclear binding energy:1193.94179736 MeV (per nucleus)
8.23408136 MeV (average binding energy per nucleon)Separation energy:SN = 3.820(11) MeV (first neutron)
SP = 11.534(22) MeV (first proton)Half-life:4.31(16) sDecay constant λ:0.16082301173085 s-1Specific activity α:6.725686320572 × 10+20 Bq g-1
18177530596.141 Ci g-1Spin and parity:
(nuclear angular momentum)5/2-Magnetic dipole moment:μ(μN) = - 0.285(7)Quadrupole moment Q:+1.224(21) barn (100 fm2)Nuclear g-factor:gl = -0.114Charge radius:4.9345(123) femtometer fmYear of discovery:1974
Radioactive Decay
Half-life T½ = 4.31(16) s.
| Decay mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 145La | 100 % | 5.319(15) MeV | |
Parent Nuclides
Direct parent isotope is: 145Cs.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 89) and isobaric (same nucleon number A = 145) with Barium-145. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| OZ | Isotone N = 89 | Isobar A = 145 |
|---|
| 50 | 139Sn | |
| 51 | 140Sb | |
| 52 | 141Te | |
| 53 | 142I | 145I |
| 54 | 143Xe | 145Xe |
| 55 | 144Cs | 145Cs |
| 56 | 145Ba | 145Ba |
| 57 | 146La | 145La |
| 58 | 147Ce | 145Ce |
| 59 | 148Pr | 145Pr |
| 60 | 149Nd | 145Nd |
| 61 | 150Pm | 145Pm |
| 62 | 151Sm | 145Sm |
| 63 | 152Eu | 145Eu |
| 64 | 153Gd | 145Gd |
| 65 | 154Tb | 145Tb |
| 66 | 155Dy | 145Dy |
| 67 | 156Ho | 145Ho |
| 68 | 157Er | 145Er |
| 69 | 158Tm | 145Tm |
| 70 | 159Yb | |
| 71 | 160Lu | |
| 72 | 161Hf | |
| 73 | 162Ta | |
| 74 | 163W | |
| 75 | 164Re | |
| 76 | 165Os | |
| 77 | 166Ir | |
| 78 | 167Pt | |
External data and identifiers
Last update: 2020-10-19
Perma link: https://www.chemlin.org/isotope/barium-145
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