Neodymium-127

Properties and data of the isotope ¹²⁷Nd.

Content

General data

Name of the isotope:Neodymium-127; Nd-127Symbol:¹²⁷Nd or 12760NdMass number A:127 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:67Isotopic mass:126.94038(32) u (atomic weight of Neodymium-127)Nuclide mass:126.9074677 u (calculated nuclear mass without electrons)Mass excess:-55.53567 MeVMass defect:1.109671292 u (per nucleus)Nuclear binding energy:1033.65215047 MeV (per nucleus)
8.13899331 MeV (average binding energy per nucleon)Separation energy:S_N = 10.61(42) MeV (first neutron)
S_P = 2.50(36) MeV (first proton)Half-life:1.8(4) sDecay constant λ:0.38508176697775 s^-1Specific activity α:1.840489399470 × 10⁺²¹ Bq g^-1
49742956742.457 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2+Year of discovery:1983

Radioactive Decay

Half-life T_½ = 1.8(4) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹²⁷Pr	100 %	9.01(36) MeV
EE, p	¹²⁶Ce	?

Parent Nuclides

Direct parent isotope is: ¹²⁷Pm.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 67) and isobaric (same nucleon number A = 127) with Neodymium-127. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 67	Isobar A = 127
38	¹⁰⁵Sr
39	¹⁰⁶Y
40	¹⁰⁷Zr
41	¹⁰⁸Nb
42	¹⁰⁹Mo
43	¹¹⁰Tc
44	¹¹¹Ru
45	¹¹²Rh	¹²⁷Rh
46	¹¹³Pd	¹²⁷Pd
47	¹¹⁴Ag	¹²⁷Ag
48	¹¹⁵Cd	¹²⁷Cd
49	¹¹⁶In	¹²⁷In
50	¹¹⁷Sn	¹²⁷Sn
51	¹¹⁸Sb	¹²⁷Sb
52	¹¹⁹Te	¹²⁷Te
53	¹²⁰I	¹²⁷I
54	¹²¹Xe	¹²⁷Xe
55	¹²²Cs	¹²⁷Cs
56	¹²³Ba	¹²⁷Ba
57	¹²⁴La	¹²⁷La
58	¹²⁵Ce	¹²⁷Ce
59	¹²⁶Pr	¹²⁷Pr
60	¹²⁷Nd	¹²⁷Nd
61	¹²⁸Pm	¹²⁷Pm
62	¹²⁹Sm
63	¹³⁰Eu