Xenon-144

Properties and data of the isotope ¹⁴⁴Xe.

Content

General data

Name of the isotope:Xenon-144; Xe-144Symbol:¹⁴⁴Xe or 14454XeMass number A:144 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:90Isotopic mass:143.938945(6) u (atomic weight of Xenon-144)Nuclide mass:143.9093236 u (calculated nuclear mass without electrons)Mass excess:-56.87237 MeVMass defect:1.263449168 u (per nucleus)Nuclear binding energy:1176.8953193 MeV (per nucleus)
8.17288416 MeV (average binding energy per nucleon)Separation energy:S_N = 4.741(7) MeV (first neutron)
S_P = 13.53(20) MeV (first proton)Half-life:1.15(20) sDecay constant λ:0.60273667874778 s^-1Specific activity α:2.538297329279 × 10⁺²¹ Bq g^-1
68602630521.065 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.9082(208) femtometer fmYear of discovery:2003

Radioactive Decay

Half-life T_½ = 1.15(20) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴⁴Cs	100 %	6.399(21) MeV

Parent Nuclides

Direct parent isotopes are: ²⁴⁸Cm, ¹⁴⁴I.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 90) and isobaric (same nucleon number A = 144) with Xenon-144. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 90	Isobar A = 144
51	¹⁴¹Sb
52	¹⁴²Te
53	¹⁴³I	¹⁴⁴I
54	¹⁴⁴Xe	¹⁴⁴Xe
55	¹⁴⁵Cs	¹⁴⁴Cs
56	¹⁴⁶Ba	¹⁴⁴Ba
57	¹⁴⁷La	¹⁴⁴La
58	¹⁴⁸Ce	¹⁴⁴Ce
59	¹⁴⁹Pr	¹⁴⁴Pr
60	¹⁵⁰Nd	¹⁴⁴Nd
61	¹⁵¹Pm	¹⁴⁴Pm
62	¹⁵²Sm	¹⁴⁴Sm
63	¹⁵³Eu	¹⁴⁴Eu
64	¹⁵⁴Gd	¹⁴⁴Gd
65	¹⁵⁵Tb	¹⁴⁴Tb
66	¹⁵⁶Dy	¹⁴⁴Dy
67	¹⁵⁷Ho	¹⁴⁴Ho
68	¹⁵⁸Er	¹⁴⁴Er
69	¹⁵⁹Tm	¹⁴⁴Tm
70	¹⁶⁰Yb
71	¹⁶¹Lu
72	¹⁶²Hf
73	¹⁶³Ta
74	¹⁶⁴W
75	¹⁶⁵Re
76	¹⁶⁶Os
77	¹⁶⁷Ir
78	¹⁶⁸Pt