Neodymium-136

Properties and data of the isotope ¹³⁶Nd.

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-136; Nd-136Symbol:¹³⁶Nd or 13660NdMass number A:136 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:76Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.2666666666667 (= neutron-proton ratio)Neutron excess (N-Z):16Isotopic mass:135.914976(13) u (atomic weight of Neodymium-136)Nuclide mass:135.8820637 u (calculated nuclear mass without electrons)Mass excess:-79.19935 MeVMass defect:1.213059536 u (per nucleus)Nuclear binding energy:1129.95767943 MeV (per nucleus)
8.30851235 MeV (average binding energy per nucleon)Separation energy:S_N = 11.057(22) MeV (first neutron)
S_P = 5.552(17) MeV (first proton)Half-life:50.65(33) minDecay constant λ:0.00022808396859491 s^-1Specific activity α:1.017447249460 × 10⁺¹⁸ Bq g^-1
27498574.309749 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.9111(26) femtometer fmYear of discovery:1968

Radioactive Decay

Half-life T_½ = 50.65(33) min (minutes) respectively 3.039 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹³⁶Pr	100 %	2.21 MeV

Parent Nuclides

Direct parent isotope is: ¹³⁶Pm.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 76) and isobaric (same nucleon number A = 136) with Neodymium-136. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 76	Isobar A = 136
42	¹¹⁸Mo
43	¹¹⁹Tc
44	¹²⁰Ru
45	¹²¹Rh
46	¹²²Pd
47	¹²³Ag
48	¹²⁴Cd
49	¹²⁵In	¹³⁶In
50	¹²⁶Sn	¹³⁶Sn
51	¹²⁷Sb	¹³⁶Sb
52	¹²⁸Te	¹³⁶Te
53	¹²⁹I	¹³⁶I
54	¹³⁰Xe	¹³⁶Xe
55	¹³¹Cs	¹³⁶Cs
56	¹³²Ba	¹³⁶Ba
57	¹³³La	¹³⁶La
58	¹³⁴Ce	¹³⁶Ce
59	¹³⁵Pr	¹³⁶Pr
60	¹³⁶Nd	¹³⁶Nd
61	¹³⁷Pm	¹³⁶Pm
62	¹³⁸Sm	¹³⁶Sm
63	¹³⁹Eu	¹³⁶Eu
64	¹⁴⁰Gd	¹³⁶Gd
65	¹⁴¹Tb	¹³⁶Tb
66	¹⁴²Dy
67	¹⁴³Ho
68	¹⁴⁴Er
69	¹⁴⁵Tm