Neodymium-154

Properties and data of the isotope ¹⁵⁴Nd.

Contents

General data

Name of the isotope:Neodymium-154; Nd-154Symbol:¹⁵⁴Nd or 15460NdMass number A:154 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:94Isotopic mass:153.92933(6) u (atomic weight of Neodymium-154)Nuclide mass:153.8964177 u (calculated nuclear mass without electrons)Mass excess:-65.82868 MeVMass defect:1.354674024 u (per nucleus)Nuclear binding energy:1261.87072531 MeV (per nucleus)
8.19396575 MeV (average binding energy per nucleon)Separation energy:S_N = 6.57(5) MeV (first neutron)
S_P = 11.55(5) MeV (first proton)Half-life:25.9(2) sDecay constant λ:0.026762439403859 s^-1Specific activity α:1.053380260428 × 10⁺²⁰ Bq g^-1
2846973676.8338 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1970

Radioactive Decay

Half-life T_½ = 25.9(2) s respectively 2.59 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁵⁴Pm	100 %	2.687(25) MeV

Parent Nuclides

Direct parent isotope is: ¹⁵⁴Pr.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 94) and isobaric (same nucleon number A = 154) with Neodymium-154. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 94	Isobar A = 154
54	¹⁴⁸Xe
55	¹⁴⁹Cs
56	¹⁵⁰Ba
57	¹⁵¹La	¹⁵⁴La
58	¹⁵²Ce	¹⁵⁴Ce
59	¹⁵³Pr	¹⁵⁴Pr
60	¹⁵⁴Nd	¹⁵⁴Nd
61	¹⁵⁵Pm	¹⁵⁴Pm
62	¹⁵⁶Sm	¹⁵⁴Sm
63	¹⁵⁷Eu	¹⁵⁴Eu
64	¹⁵⁸Gd	¹⁵⁴Gd
65	¹⁵⁹Tb	¹⁵⁴Tb
66	¹⁶⁰Dy	¹⁵⁴Dy
67	¹⁶¹Ho	¹⁵⁴Ho
68	¹⁶²Er	¹⁵⁴Er
69	¹⁶³Tm	¹⁵⁴Tm
70	¹⁶⁴Yb	¹⁵⁴Yb
71	¹⁶⁵Lu	¹⁵⁴Lu
72	¹⁶⁶Hf	¹⁵⁴Hf
73	¹⁶⁷Ta
74	¹⁶⁸W
75	¹⁶⁹Re
76	¹⁷⁰Os
77	¹⁷¹Ir
78	¹⁷²Pt
79	¹⁷³Au
80	¹⁷⁴Hg