Gadolinium-151

Properties and data of the isotope ¹⁵¹Gd.

Contents

General data

Name of the isotope:Gadolinium-151; Gd-151Symbol:¹⁵¹Gd or 15164GdMass number A:151 (= number of nucleons)Atomic number Z:64 (= number of protons)Neutrons N:87Isotopic mass:150.920355(3) u (atomic weight of Gadolinium-151)Nuclide mass:150.8852487 u (calculated nuclear mass without electrons)Mass excess:-74.18884 MeVMass defect:1.33429474 u (per nucleus)Nuclear binding energy:1242.88754454 MeV (per nucleus)
8.23104334 MeV (average binding energy per nucleon)Separation energy:S_N = 6.496(7) MeV (first neutron)
S_P = 6.685(7) MeV (first proton)Half-life:123.9(10) dDecay constant λ:6.475009533524 × 10^-8 s^-1Specific activity α:2.599561298687 × 10⁺¹⁴ Bq g^-1
7025.8413478046 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μ_N) = 0.77(6)Nuclear g-factor:g_l = 0.22Year of discovery:1950

Radioactive Decay

Half-life T_½ = 123.9(10) d respectively 1.0704960 × 10⁷ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC	¹⁵¹Eu	> 99 %	0.464(4) MeV
α	¹⁴⁷Sm	<< 1 %	2.6527(29) MeV

Parent Nuclides

Direct parent isotope is: ¹⁵¹Tb.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 87) and isobaric (same nucleon number A = 151) with Gadolinium-151. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 87	Isobar A = 151
49	¹³⁶In
50	¹³⁷Sn
51	¹³⁸Sb
52	¹³⁹Te
53	¹⁴⁰I
54	¹⁴¹Xe
55	¹⁴²Cs	¹⁵¹Cs
56	¹⁴³Ba	¹⁵¹Ba
57	¹⁴⁴La	¹⁵¹La
58	¹⁴⁵Ce	¹⁵¹Ce
59	¹⁴⁶Pr	¹⁵¹Pr
60	¹⁴⁷Nd	¹⁵¹Nd
61	¹⁴⁸Pm	¹⁵¹Pm
62	¹⁴⁹Sm	¹⁵¹Sm
63	¹⁵⁰Eu	¹⁵¹Eu
64	¹⁵¹Gd	¹⁵¹Gd
65	¹⁵²Tb	¹⁵¹Tb
66	¹⁵³Dy	¹⁵¹Dy
67	¹⁵⁴Ho	¹⁵¹Ho
68	¹⁵⁵Er	¹⁵¹Er
69	¹⁵⁶Tm	¹⁵¹Tm
70	¹⁵⁷Yb	¹⁵¹Yb
71	¹⁵⁸Lu	¹⁵¹Lu
72	¹⁵⁹Hf
73	¹⁶⁰Ta
74	¹⁶¹W
75	¹⁶²Re
76	¹⁶³Os
77	¹⁶⁴Ir