Gadolinium-152

Properties and data of the isotope ¹⁵²Gd.

Contents

General data

Name of the isotope:Gadolinium-152; Gd-152Symbol:¹⁵²Gd or 15264GdMass number A:152 (= number of nucleons)Atomic number Z:64 (= number of protons)Neutrons N:88Isotopic mass:151.91980(2) u (atomic weight of Gadolinium-152)Nuclide mass:151.8846937 u (calculated nuclear mass without electrons)Mass excess:-74.70582 MeVMass defect:1.343514656 u (per nucleus)Nuclear binding energy:1251.47584098 MeV (per nucleus)
8.23339369 MeV (average binding energy per nucleon)Separation energy:S_N = 8.5895(28) MeV (first neutron)
S_P = 7.3430(7) MeV (first proton)Half-life:1.08(8) × 10¹⁴ aDecay constant λ:2.035143787934 × 10^-22 s^-1Specific activity α:0.81165050073938 Bq g^-1
2.193650001998 × 10^-11 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.0774(47) femtometer fmYear of discovery:1938

Radioactive Decay

Half-life T_½ = 1.08(8) × 10¹⁴ a respectively 3.405888 × 10²¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁴⁸Sm	100 %	2.2044(10) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁵²Tb, ¹⁵²Eu.

Occurrence

Comparison of the natural Gadolinium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Gadolinium Isotopic mixture	157.25 u	100 %
Isotope ¹⁵²Gd	151.91980(2) u	0.20(3) %	1.08(8) × 10¹⁴ a	0+
Isotope ¹⁵⁴Gd	153.92087(2) u	2.18(2) %	stable	0+
Isotope ¹⁵⁵Gd	154.92263(2) u	14.80(9) %	stable	3/2-
Isotope ¹⁵⁶Gd	155.92213(2) u	20.47(3) %	stable	0+
Isotope ¹⁵⁷Gd	156.92397(2) u	15.65(4) %	stable	3/2-
Isotope ¹⁵⁸Gd	157.92411(2) u	24.84(8) %	stable	0+
Isotope ¹⁶⁰Gd	159.92706(2) u	21.86(3) %	stable	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 88) and isobaric (same nucleon number A = 152) with Gadolinium-152. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 88	Isobar A = 152
49	¹³⁷In
50	¹³⁸Sn
51	¹³⁹Sb
52	¹⁴⁰Te
53	¹⁴¹I
54	¹⁴²Xe
55	¹⁴³Cs
56	¹⁴⁴Ba	¹⁵²Ba
57	¹⁴⁵La	¹⁵²La
58	¹⁴⁶Ce	¹⁵²Ce
59	¹⁴⁷Pr	¹⁵²Pr
60	¹⁴⁸Nd	¹⁵²Nd
61	¹⁴⁹Pm	¹⁵²Pm
62	¹⁵⁰Sm	¹⁵²Sm
63	¹⁵¹Eu	¹⁵²Eu
64	¹⁵²Gd	¹⁵²Gd
65	¹⁵³Tb	¹⁵²Tb
66	¹⁵⁴Dy	¹⁵²Dy
67	¹⁵⁵Ho	¹⁵²Ho
68	¹⁵⁶Er	¹⁵²Er
69	¹⁵⁷Tm	¹⁵²Tm
70	¹⁵⁸Yb	¹⁵²Yb
71	¹⁵⁹Lu	¹⁵²Lu
72	¹⁶⁰Hf
73	¹⁶¹Ta
74	¹⁶²W
75	¹⁶³Re
76	¹⁶⁴Os
77	¹⁶⁵Ir
78	¹⁶⁶Pt