Cerium-147

Properties and data of the isotope ¹⁴⁷Ce.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

Cerium-147 is a radioisotope of the chemical element cerium, which has 89 neutrons in its atomic nucleus in addition to the element-specific 58 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 147. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of ¹⁴⁷Ce is exclusively for academic purposes.

Cerium-147 was identified in 1964 during experiments investigating short-lived fission products from the irradiation of Uranium-235 with thermal neutrons. The nuclide was formed directly during the nuclear fission of the target material and was detected via its decay chain to praseodymium-147. For this purpose, the cerium component was chemically separated at defined intervals, and the activity of the daughter nuclide was measured [1].

See also: List of individual Cerium isotopes (and general data sources).

General data

Name of the isotope:Cerium-147; Ce-147Symbol:¹⁴⁷Ce or 14758CeMass number A:147 (= number of nucleons)Atomic number Z:58 (= number of protons)Neutrons N:89Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.5344827586207 (= neutron-proton ratio)Neutron excess (N-Z):31Isotopic mass:146.922690(9) u (atomic weight of Cerium-147)Nuclide mass:146.8908746 u (calculated nuclear mass without electrons)Mass excess:-72.0138 MeVMass defect:1.30233938 u (per nucleus)Nuclear binding energy:1213.12131843 MeV (per nucleus)
8.25252598 MeV (average binding energy per nucleon)Separation energy:S_N = 4.459(17) MeV (first neutron)
S_P = 10.082(9) MeV (first proton)Half-life:56.4(10) sDecay constant λ:0.012289843626949 s^-1Specific activity α:5.069258182745 × 10⁺¹⁹ Bq g^-1
1370069779.1204 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1964

Radioactive Decay

Half-life T_½ = 56.4(10) s respectively 5.64 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴⁷Pr	100 %	3.430(16) MeV

Parent Nuclides

Direct parent isotope is: ¹⁴⁷La.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 89) and isobaric (same nucleon number A = 147) with Cerium-147. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 89	Isobar A = 147
50	¹³⁹Sn
51	¹⁴⁰Sb
52	¹⁴¹Te
53	¹⁴²I
54	¹⁴³Xe	¹⁴⁷Xe
55	¹⁴⁴Cs	¹⁴⁷Cs
56	¹⁴⁵Ba	¹⁴⁷Ba
57	¹⁴⁶La	¹⁴⁷La
58	¹⁴⁷Ce	¹⁴⁷Ce
59	¹⁴⁸Pr	¹⁴⁷Pr
60	¹⁴⁹Nd	¹⁴⁷Nd
61	¹⁵⁰Pm	¹⁴⁷Pm
62	¹⁵¹Sm	¹⁴⁷Sm
63	¹⁵²Eu	¹⁴⁷Eu
64	¹⁵³Gd	¹⁴⁷Gd
65	¹⁵⁴Tb	¹⁴⁷Tb
66	¹⁵⁵Dy	¹⁴⁷Dy
67	¹⁵⁶Ho	¹⁴⁷Ho
68	¹⁵⁷Er	¹⁴⁷Er
69	¹⁵⁸Tm	¹⁴⁷Tm
70	¹⁵⁹Yb
71	¹⁶⁰Lu
72	¹⁶¹Hf
73	¹⁶²Ta
74	¹⁶³W
75	¹⁶⁴Re
76	¹⁶⁵Os
77	¹⁶⁶Ir
78	¹⁶⁷Pt

External data and identifiers

Adopted Levels, Gammas:NuDat 147Ce

Literature and References

[1] - D.C. Hoffman, W.R. Daniels:
Some short-lived isotopes of cerium and praseodymium.
In: Journal of Inorganic and Nuclear Chemistry, 26, 11, (1964), DOI 10.1016/0022-1902(64)80001-4.