Gadolinium-136

Properties and data of the isotope ¹³⁶Gd.

Content

General data

Name of the isotope:Gadolinium-136; Gd-136Symbol:¹³⁶Gd or 13664GdMass number A:136 (= number of nucleons)Atomic number Z:64 (= number of protons)Neutrons N:72Isotopic mass:135.94730(32) u (atomic weight of Gadolinium-136)Nuclide mass:135.9121937 u (calculated nuclear mass without electrons)Mass excess:-49.08973 MeVMass defect:1.177376 u (per nucleus)Nuclear binding energy:1096.71867974 MeV (per nucleus)
8.06410794 MeV (average binding energy per nucleon)Separation energy:S_N = 12.77(50) MeV (first neutron)
S_P = 2.23(36) MeV (first proton)Half-life:200 nsDecay constant λ:3465735.9027997 s^-1Specific activity α:1.546011095555 × 10⁺²⁸ Bq g^-1
4.178408366366 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)(0+)Year of discovery:2000

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 72) and isobaric (same nucleon number A = 136) with Gadolinium-136. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 72	Isobar A = 136
40	¹¹²Zr
41	¹¹³Nb
42	¹¹⁴Mo
43	¹¹⁵Tc
44	¹¹⁶Ru
45	¹¹⁷Rh
46	¹¹⁸Pd
47	¹¹⁹Ag
48	¹²⁰Cd
49	¹²¹In	¹³⁶In
50	¹²²Sn	¹³⁶Sn
51	¹²³Sb	¹³⁶Sb
52	¹²⁴Te	¹³⁶Te
53	¹²⁵I	¹³⁶I
54	¹²⁶Xe	¹³⁶Xe
55	¹²⁷Cs	¹³⁶Cs
56	¹²⁸Ba	¹³⁶Ba
57	¹²⁹La	¹³⁶La
58	¹³⁰Ce	¹³⁶Ce
59	¹³¹Pr	¹³⁶Pr
60	¹³²Nd	¹³⁶Nd
61	¹³³Pm	¹³⁶Pm
62	¹³⁴Sm	¹³⁶Sm
63	¹³⁵Eu	¹³⁶Eu
64	¹³⁶Gd	¹³⁶Gd
65	¹³⁷Tb	¹³⁶Tb
66	¹³⁸Dy