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Barium-144

Properties and data of the isotope 144Ba.


Contents

Barium-144 is a radioisotope of the chemical element barium, which, in addition to the element-specific 56 protons, has 88 neutrons in the atomic nucleus, resulting in the mass number 144. The very short-lived, only artificially producible, unstable and therefore radioactive nuclide has no practical significance; dealing with 144Ba is for academic purposes only.

The neutron-rich nucleus of the isotope shows an octupole deformation.

See also: list of Barium isotopes.

 

General data

Name of the isotope:Barium-144; Ba-144Symbol:144Ba or 14456BaMass number A:144 (= number of nucleons)Atomic number Z:56 (= number of protons)Neutrons N:88Isotopic mass:143.922955(8) u (atomic weight of Barium-144)Nuclide mass:143.8922366 u (calculated nuclear mass without electrons)Mass excess:-71.76696 MeVMass defect:1.2777594 u (per nucleus)Nuclear binding energy:1190.22521454 MeV (per nucleus)
8.26545288 MeV (average binding energy per nucleon)
Separation energy:SN = 5.901(10) MeV (first neutron)
SP = 11.381(10) MeV (first proton)
Half-life:11.5(2) sDecay constant λ:0.060273667874778 s-1Specific activity α:2.538297329279 × 10+20 Bq g-1
6860263052.1065 Ci g-1
Spin and parity:
(nuclear angular momentum)
0+Charge radius:4.9236(112) femtometer fmYear of discovery:1967

 

Radioactive Decay

Half-life T½ = 11.5(2) s respectively 1.15 × 101 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
β-144La100 %3.083(15) MeV

 

Barium-144 decay scheme

 

Parent Nuclides

Direct parent isotopes are: 144Cs, 145Cs.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 88) and isobaric (same nucleon number A = 144) with Barium-144. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 88Isobar A = 144
49137In
50138Sn
51139Sb
52140Te
53141I144I
54142Xe144Xe
55143Cs144Cs
56144Ba144Ba
57145La144La
58146Ce144Ce
59147Pr144Pr
60148Nd144Nd
61149Pm144Pm
62150Sm144Sm
63151Eu144Eu
64152Gd144Gd
65153Tb144Tb
66154Dy144Dy
67155Ho144Ho
68156Er144Er
69157Tm144Tm
70158Yb
71159Lu
72160Hf
73161Ta
74162W
75163Re
76164Os
77165Ir
78166Pt

 

External data and identifiers

Adopted Levels, Gammas:NuDat 144Ba

 

Literature and References

[1] - C. Chung, W. B. Walters et al.:
Decay of neutron-rich 144Ba to levels of 144La.
In: Physical Review C, 26, 1198, (1982), DOI 10.1103/PhysRevC.26.1198.

[2] - B. Bucher et al.:
Direct Evidence of Octupole Deformation in Neutron-Rich 144Ba.
In: Physical Review Letters, 116, 112503, (2016), DOI 10.1103/PhysRevLett.116.112503.

 


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Last update: 2023-05-15


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