Neodymium-142

Properties and data of the isotope ¹⁴²Nd.

Contents

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

General data

Name of the isotope:Neodymium-142; Nd-142Symbol:¹⁴²Nd or 14260NdMass number A:142 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:82Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3666666666667 (= neutron-proton ratio)Neutron excess (N-Z):22Isotopic mass:141.90773(2) u (atomic weight of Neodymium-142)Nuclide mass:141.8748177 u (calculated nuclear mass without electrons)Mass excess:-85.94895 MeVMass defect:1.272295032 u (per nucleus)Nuclear binding energy:1185.13518854 MeV (per nucleus)
8.34602245 MeV (average binding energy per nucleon)Separation energy:S_N = 9.829(3) MeV (first neutron)
S_P = 7.2233(14) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.9123(25) femtometer fmYear of discovery:1924

Parent Nuclides

Direct parent isotopes are: ¹⁴²Pm, ¹⁴²Pr, ¹⁴²Ce, ¹⁴⁶Sm.

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 = 82) and isobaric (same nucleon number A = 142) with Neodymium-142. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 82	Isobar A = 142
45	¹²⁷Rh
46	¹²⁸Pd
47	¹²⁹Ag
48	¹³⁰Cd
49	¹³¹In
50	¹³²Sn
51	¹³³Sb
52	¹³⁴Te	¹⁴²Te
53	¹³⁵I	¹⁴²I
54	¹³⁶Xe	¹⁴²Xe
55	¹³⁷Cs	¹⁴²Cs
56	¹³⁸Ba	¹⁴²Ba
57	¹³⁹La	¹⁴²La
58	¹⁴⁰Ce	¹⁴²Ce
59	¹⁴¹Pr	¹⁴²Pr
60	¹⁴²Nd	¹⁴²Nd
61	¹⁴³Pm	¹⁴²Pm
62	¹⁴⁴Sm	¹⁴²Sm
63	¹⁴⁵Eu	¹⁴²Eu
64	¹⁴⁶Gd	¹⁴²Gd
65	¹⁴⁷Tb	¹⁴²Tb
66	¹⁴⁸Dy	¹⁴²Dy
67	¹⁴⁹Ho	¹⁴²Ho
68	¹⁵⁰Er
69	¹⁵¹Tm
70	¹⁵²Yb
71	¹⁵³Lu
72	¹⁵⁴Hf
73	¹⁵⁵Ta
74	¹⁵⁶W