Praseodymium-147

Properties and data of the isotope ¹⁴⁷Pr.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

Praseodymium-147 is a radioisotope of the chemical element praseodymium, which has 88 neutrons in its atomic nucleus in addition to the element-specific 59 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 ¹⁴⁷Pr is exclusively for academic purposes.

Praseodymium-147 was identified in 1964 as a β-decay product of cerium-147 following irradiation of uranium-235 with thermal neutrons. The determination was made after selective chemical separation of the praseodymium component and direct measurement of the radioactive decay. The activity curve yielded a half-life of approximately twelve minutes. Supplementary β- and γ-spectroscopic studies provided additional evidence for the energetic structure of the decay and confirmed the assignment to praseodymium-147 [1].

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

General data

Name of the isotope:Praseodymium-147; Pr-147Symbol:¹⁴⁷Pr or 14759PrMass number A:147 (= number of nucleons)Atomic number Z:59 (= number of protons)Neutrons N:88Isotopic mass:146.919007(17) u (atomic weight of Praseodymium-147)Nuclide mass:146.8866432 u (calculated nuclear mass without electrons)Mass excess:-75.44449 MeVMass defect:1.305182496 u (per nucleus)Nuclear binding energy:1215.76966393 MeV (per nucleus)
8.27054193 MeV (average binding energy per nucleon)Separation energy:S_N = 6.842(38) MeV (first neutron)
S_P = 7.107(22) MeV (first proton)Half-life:13.39(4) minDecay constant λ:0.00086276721503603 s^-1Specific activity α:3.558702533070 × 10⁺¹⁸ Bq g^-1
96181149.542435 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2+Year of discovery:1964

Radioactive Decay

Half-life T_½ = 13.39(4) min (minutes) respectively 8.034 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴⁷Nd	100 %	2.703(16) MeV

Parent Nuclides

Direct parent isotope is: ¹⁴⁷Ce.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 88) and isobaric (same nucleon number A = 147) with Praseodymium-147. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 88	Isobar A = 147
49	¹³⁷In
50	¹³⁸Sn
51	¹³⁹Sb
52	¹⁴⁰Te
53	¹⁴¹I
54	¹⁴²Xe	¹⁴⁷Xe
55	¹⁴³Cs	¹⁴⁷Cs
56	¹⁴⁴Ba	¹⁴⁷Ba
57	¹⁴⁵La	¹⁴⁷La
58	¹⁴⁶Ce	¹⁴⁷Ce
59	¹⁴⁷Pr	¹⁴⁷Pr
60	¹⁴⁸Nd	¹⁴⁷Nd
61	¹⁴⁹Pm	¹⁴⁷Pm
62	¹⁵⁰Sm	¹⁴⁷Sm
63	¹⁵¹Eu	¹⁴⁷Eu
64	¹⁵²Gd	¹⁴⁷Gd
65	¹⁵³Tb	¹⁴⁷Tb
66	¹⁵⁴Dy	¹⁴⁷Dy
67	¹⁵⁵Ho	¹⁴⁷Ho
68	¹⁵⁶Er	¹⁴⁷Er
69	¹⁵⁷Tm	¹⁴⁷Tm
70	¹⁵⁸Yb
71	¹⁵⁹Lu
72	¹⁶⁰Hf
73	¹⁶¹Ta
74	¹⁶²W
75	¹⁶³Re
76	¹⁶⁴Os
77	¹⁶⁵Ir
78	¹⁶⁶Pt

External data and identifiers

Adopted Levels, Gammas:NuDat 147Pr

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.