Praseodymium-154

Properties and data of the isotope ¹⁵⁴Pr.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: list of Praseodymium isotopes.

General data

Name of the isotope:Praseodymium-154; Pr-154Symbol:¹⁵⁴Pr or 15459PrMass number A:154 (= number of nucleons)Atomic number Z:59 (= number of protons)Neutrons N:95Isotopic mass:153.93762(12) u (atomic weight of Praseodymium-154)Nuclide mass:153.9052562 u (calculated nuclear mass without electrons)Mass excess:-58.1066 MeVMass defect:1.347223908 u (per nucleus)Nuclear binding energy:1254.93098696 MeV (per nucleus)
8.14890251 MeV (average binding energy per nucleon)Separation energy:S_N = 4.61(11) MeV (first neutron)
S_P = 10.48(23) MeV (first proton)Half-life:2.3(1) sDecay constant λ:0.30136833937389 s^-1Specific activity α:1.18619777152 × 10⁺²¹ Bq g^-1
32059399230.432 Ci g^-1Spin and parity:
(nuclear angular momentum)(3+)Year of discovery:1988

Radioactive Decay

Half-life T_½ = 2.3(1) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁵⁴Nd	100 %	7.72(10) MeV

Parent Nuclides

Direct parent isotope is: ¹⁵⁴Ce.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 95) and isobaric (same nucleon number A = 154) with Praseodymium-154. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 95	Isobar A = 154
55	¹⁵⁰Cs
56	¹⁵¹Ba
57	¹⁵²La	¹⁵⁴La
58	¹⁵³Ce	¹⁵⁴Ce
59	¹⁵⁴Pr	¹⁵⁴Pr
60	¹⁵⁵Nd	¹⁵⁴Nd
61	¹⁵⁶Pm	¹⁵⁴Pm
62	¹⁵⁷Sm	¹⁵⁴Sm
63	¹⁵⁸Eu	¹⁵⁴Eu
64	¹⁵⁹Gd	¹⁵⁴Gd
65	¹⁶⁰Tb	¹⁵⁴Tb
66	¹⁶¹Dy	¹⁵⁴Dy
67	¹⁶²Ho	¹⁵⁴Ho
68	¹⁶³Er	¹⁵⁴Er
69	¹⁶⁴Tm	¹⁵⁴Tm
70	¹⁶⁵Yb	¹⁵⁴Yb
71	¹⁶⁶Lu	¹⁵⁴Lu
72	¹⁶⁷Hf	¹⁵⁴Hf
73	¹⁶⁸Ta
74	¹⁶⁹W
75	¹⁷⁰Re
76	¹⁷¹Os
77	¹⁷²Ir
78	¹⁷³Pt
79	¹⁷⁴Au
80	¹⁷⁵Hg
81	¹⁷⁶Tl