Cerium-144

Properties and data of the isotope ¹⁴⁴Ce.

Content

General data

Name of the isotope:Cerium-144; Ce-144Symbol:¹⁴⁴Ce or 14458CeMass number A:144 (= number of nucleons)Atomic number Z:58 (= number of protons)Neutrons N:86Isotopic mass:143.913653(3) u (atomic weight of Cerium-144)Nuclide mass:143.8818376 u (calculated nuclear mass without electrons)Mass excess:-80.43171 MeVMass defect:1.285381632 u (per nucleus)Nuclear binding energy:1197.32527792 MeV (per nucleus)
8.31475887 MeV (average binding energy per nucleon)Separation energy:S_N = 6.897(3) MeV (first neutron)
S_P = 9.549(8) MeV (first proton)Half-life:284.91(5) dDecay constant λ:2.815814401753 × 10^-8 s^-1Specific activity α:1.185820347048 × 10⁺¹⁴ Bq g^-1
3204.9198568889 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.9303(23) femtometer fmYear of discovery:1945

Radioactive Decay

Half-life T_½ = 284.91(5) d respectively 2.4616224 × 10⁷ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴⁴Pr	100 %	0.3186(8) MeV

Parent Nuclides

Direct parent isotope is: ¹⁴⁴La.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 86) and isobaric (same nucleon number A = 144) with Cerium-144. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 86	Isobar A = 144
48	¹³⁴Cd
49	¹³⁵In
50	¹³⁶Sn
51	¹³⁷Sb
52	¹³⁸Te
53	¹³⁹I	¹⁴⁴I
54	¹⁴⁰Xe	¹⁴⁴Xe
55	¹⁴¹Cs	¹⁴⁴Cs
56	¹⁴²Ba	¹⁴⁴Ba
57	¹⁴³La	¹⁴⁴La
58	¹⁴⁴Ce	¹⁴⁴Ce
59	¹⁴⁵Pr	¹⁴⁴Pr
60	¹⁴⁶Nd	¹⁴⁴Nd
61	¹⁴⁷Pm	¹⁴⁴Pm
62	¹⁴⁸Sm	¹⁴⁴Sm
63	¹⁴⁹Eu	¹⁴⁴Eu
64	¹⁵⁰Gd	¹⁴⁴Gd
65	¹⁵¹Tb	¹⁴⁴Tb
66	¹⁵²Dy	¹⁴⁴Dy
67	¹⁵³Ho	¹⁴⁴Ho
68	¹⁵⁴Er	¹⁴⁴Er
69	¹⁵⁵Tm	¹⁴⁴Tm
70	¹⁵⁶Yb
71	¹⁵⁷Lu
72	¹⁵⁸Hf
73	¹⁵⁹Ta
74	¹⁶⁰W
75	¹⁶¹Re
76	¹⁶²Os