Neodymium-141m

Properties and data of the isotope ^141mNd.

Contents

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

General data

Name of the isotope:Neodymium-141m; Nd-141mSymbol:^141mNd or 141m60NdMass number A:141 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:81Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.35 (= neutron-proton ratio)Neutron excess (N-Z):21Excitation energy:756.51(5) keVIsotopic mass:140.909615(4) u (atomic weight of Neodymium-141m)Nuclide mass:140.8767027 u (calculated nuclear mass without electrons)Mass excess:-84.19309 MeVMass defect:1.261745116 u (per nucleus)Nuclear binding energy:1175.30800508 MeV (per nucleus)
8.33551777 MeV (average binding energy per nucleon)Half-life:62.0(8) sDecay constant λ:0.011179793234838 s^-1Specific activity α:4.809020688940 × 10⁺¹⁹ Bq g^-1
1299735321.3352 Ci g^-1Spin and parity:
(nuclear angular momentum)11/2-

Radioactive Decay

Half-life T_½ = 62.0(8) s respectively 6.20 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	¹⁴¹Pr	< 0.05 %
Iso	¹⁴¹Nd	99.95 %

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
¹⁴¹Nd		2.49(3) h	3/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 81) and isobaric (same nucleon number A = 141) with Neodymium-141m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 81	Isobar A = 141
45	¹²⁶Rh
46	¹²⁷Pd
47	¹²⁸Ag
48	¹²⁹Cd
49	¹³⁰In
50	¹³¹Sn
51	¹³²Sb	¹⁴¹Sb
52	¹³³Te	¹⁴¹Te
53	¹³⁴I	¹⁴¹I
54	¹³⁵Xe	¹⁴¹Xe
55	¹³⁶Cs	¹⁴¹Cs
56	¹³⁷Ba	¹⁴¹Ba
57	¹³⁸La	¹⁴¹La
58	¹³⁹Ce	¹⁴¹Ce
59	¹⁴⁰Pr	¹⁴¹Pr
60	¹⁴¹Nd	¹⁴¹Nd
61	¹⁴²Pm	¹⁴¹Pm
62	¹⁴³Sm	¹⁴¹Sm
63	¹⁴⁴Eu	¹⁴¹Eu
64	¹⁴⁵Gd	¹⁴¹Gd
65	¹⁴⁶Tb	¹⁴¹Tb
66	¹⁴⁷Dy	¹⁴¹Dy
67	¹⁴⁸Ho	¹⁴¹Ho
68	¹⁴⁹Er
69	¹⁵⁰Tm
70	¹⁵¹Yb
71	¹⁵²Lu
72	¹⁵³Hf