Gadolinium-164

Properties and data of the isotope ¹⁶⁴Gd.

Content

General data

Name of the isotope:Gadolinium-164; Gd-164Symbol:¹⁶⁴Gd or 16464GdMass number A:164 (= number of nucleons)Atomic number Z:64 (= number of protons)Neutrons N:100Isotopic mass:163.93586(43) u (atomic weight of Gadolinium-164)Nuclide mass:163.9007537 u (calculated nuclear mass without electrons)Mass excess:-59.74603 MeVMass defect:1.431433648 u (per nucleus)Nuclear binding energy:1333.37185451 MeV (per nucleus)
8.13031619 MeV (average binding energy per nucleon)Separation energy:S_N = 6.53(10) MeV (first neutron)
S_P = 10.58(12) MeV (first proton)Half-life:45(3) sDecay constant λ:0.01540327067911 s^-1Specific activity α:5.690838388548 × 10⁺¹⁹ Bq g^-1
1538064429.3373 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1988

Radioactive Decay

Half-life T_½ = 45(3) s respectively 4.5 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁶⁴Tb	100 %	2.30(14) MeV

Parent Nuclides

Direct parent isotope is: ²⁵²Cf.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 100) and isobaric (same nucleon number A = 164) with Gadolinium-164. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 100	Isobar A = 164
59	¹⁵⁹Pr
60	¹⁶⁰Nd
61	¹⁶¹Pm
62	¹⁶²Sm	¹⁶⁴Sm
63	¹⁶³Eu	¹⁶⁴Eu
64	¹⁶⁴Gd	¹⁶⁴Gd
65	¹⁶⁵Tb	¹⁶⁴Tb
66	¹⁶⁶Dy	¹⁶⁴Dy
67	¹⁶⁷Ho	¹⁶⁴Ho
68	¹⁶⁸Er	¹⁶⁴Er
69	¹⁶⁹Tm	¹⁶⁴Tm
70	¹⁷⁰Yb	¹⁶⁴Yb
71	¹⁷¹Lu	¹⁶⁴Lu
72	¹⁷²Hf	¹⁶⁴Hf
73	¹⁷³Ta	¹⁶⁴Ta
74	¹⁷⁴W	¹⁶⁴W
75	¹⁷⁵Re	¹⁶⁴Re
76	¹⁷⁶Os	¹⁶⁴Os
77	¹⁷⁷Ir	¹⁶⁴Ir
78	¹⁷⁸Pt
79	¹⁷⁹Au
80	¹⁸⁰Hg
81	¹⁸¹Tl
82	¹⁸²Pb