Neodymium-159

Properties and data of the isotope ¹⁵⁹Nd.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Neodymium-159; Nd-159Symbol:¹⁵⁹Nd or 15960NdMass number A:159 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:99Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.65 (= neutron-proton ratio)Neutron excess (N-Z):39Isotopic mass:158.94653(32) u (atomic weight of Neodymium-159)Nuclide mass:158.9136177 u (calculated nuclear mass without electrons)Mass excess:-49.80698 MeVMass defect:1.380798604 u (per nucleus)Nuclear binding energy:1286.20561483 MeV (per nucleus)
8.08934349 MeV (average binding energy per nucleon)Separation energy:S_N = 3.82(36) MeV (first neutron)
S_P = 12.77(42) MeV (first proton)Half-life:485 msDecay constant λ:1.4291694444535 s^-1Specific activity α:5.447252979250 × 10⁺²¹ Bq g^-1
147223053493.27 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2+)Year of discovery:2012

Radioactive Decay

Half-life T_½ = 485 ms respectively 4.85 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁵⁹Pm	100 %	6.75(30) MeV
β^-, n	¹⁵⁸Pm	?	1.21(30) MeV

Parent Nuclides

Direct parent isotope is: ¹⁵⁹Pr.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 99) and isobaric (same nucleon number A = 159) with Neodymium-159. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 99	Isobar A = 159
57	¹⁵⁶La
58	¹⁵⁷Ce	¹⁵⁹Ce
59	¹⁵⁸Pr	¹⁵⁹Pr
60	¹⁵⁹Nd	¹⁵⁹Nd
61	¹⁶⁰Pm	¹⁵⁹Pm
62	¹⁶¹Sm	¹⁵⁹Sm
63	¹⁶²Eu	¹⁵⁹Eu
64	¹⁶³Gd	¹⁵⁹Gd
65	¹⁶⁴Tb	¹⁵⁹Tb
66	¹⁶⁵Dy	¹⁵⁹Dy
67	¹⁶⁶Ho	¹⁵⁹Ho
68	¹⁶⁷Er	¹⁵⁹Er
69	¹⁶⁸Tm	¹⁵⁹Tm
70	¹⁶⁹Yb	¹⁵⁹Yb
71	¹⁷⁰Lu	¹⁵⁹Lu
72	¹⁷¹Hf	¹⁵⁹Hf
73	¹⁷²Ta	¹⁵⁹Ta
74	¹⁷³W	¹⁵⁹W
75	¹⁷⁴Re	¹⁵⁹Re
76	¹⁷⁵Os
77	¹⁷⁶Ir
78	¹⁷⁷Pt
79	¹⁷⁸Au
80	¹⁷⁹Hg
81	¹⁸⁰Tl
82	¹⁸¹Pb