Neodymium-146

Properties and data of the isotope ¹⁴⁶Nd.

Contents

General data

Name of the isotope:Neodymium-146; Nd-146Symbol:¹⁴⁶Nd or 14660NdMass number A:146 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:86Isotopic mass:145.91312(2) u (atomic weight of Neodymium-146)Nuclide mass:145.8802077 u (calculated nuclear mass without electrons)Mass excess:-80.9282 MeVMass defect:1.301564696 u (per nucleus)Nuclear binding energy:1212.39970494 MeV (per nucleus)
8.30410757 MeV (average binding energy per nucleon)Separation energy:S_N = 7.56523(9) MeV (first neutron)
S_P = 8.589(7) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.9696(30) femtometer fmYear of discovery:1924

Parent Nuclides

Direct parent isotopes are: ¹⁴⁶Pm, ¹⁴⁶Pr.

Occurrence

Comparison of the natural Neodymium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Neodymium Isotopic mixture	144.242 u	100 %
Isotope ¹⁴²Nd	141.90773(2) u	27.153(40) %	stable	0+
Isotope ¹⁴³Nd	142.90982(2) u	12.173(26) %	stable	7/2-
Isotope ¹⁴⁴Nd	143.9100928(13) u	23.798(19) %	2.29(16) × 10¹⁵ a	0+
Isotope ¹⁴⁵Nd	144.91258(2) u	8.293(12) %	stable	7/2-
Isotope ¹⁴⁶Nd	145.91312(2) u	17.189(32) %	stable	0+
Isotope ¹⁴⁸Nd	147.91690(2) u	5.756(21) %	stable	0+
Isotope ¹⁵⁰Nd	149.92090(2) u	5.638(28) %	6.7(7) × 10¹⁸ a	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 86) and isobaric (same nucleon number A = 146) with Neodymium-146. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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