Holmium-165

Properties and data of the isotope ¹⁶⁵Ho.

Content

General data

Name of the isotope:Holmium-165; Ho-165Symbol:¹⁶⁵Ho or 16567HoMass number A:165 (= number of nucleons)Atomic number Z:67 (= number of protons)Neutrons N:98Isotopic mass:164.93033(2) u (atomic weight of Holmium-165)Nuclide mass:164.8935783 u (calculated nuclear mass without electrons)Mass excess:-64.89719 MeVMass defect:1.443108912 u (per nucleus)Nuclear binding energy:1344.24729287 MeV (per nucleus)
8.14695329 MeV (average binding energy per nucleon)Separation energy:S_N = 7.9888(11) MeV (first neutron)
S_P = 6.2200(8) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μ_N) = + 4.177(5)Charge radius:5.2022(312) femtometer fmYear of discovery:1934

Parent Nuclides

Direct parent isotopes are: ¹⁶⁵Er, ¹⁶⁵Dy.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Holmium Isotopic mixture	164.930328 u	100 %
Isotope ¹⁶⁵Ho	164.93033(2) u	100 %	stable	7/2-

NMR data

Nuclear magnetic properties of the NMR active Nuclide ¹⁶⁵Ho

Isotope:¹⁶⁵Ho-NMRQuantity:100 %Spin:7/2-Nuclearmagnetic moment
μ/μ_N:+ 4.177(5)Gyromagnetic ratio γ:5.710 · 10⁷ rad T^-1 s^-1Nuclear g-factor:g_l = 1.1934285714286Quadrupole moment Q:+ 3.58(2) barn (100 fm²)Resonance frequency:v₀ = 9.0883 at 1 TRelative Sensitivity:0.20423 (H₀ = const.)
4.4826 (v₀ = const.)
[related to ¹H = 1.000]

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 98) and isobaric (same nucleon number A = 165) with Holmium-165. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 98	Isobar A = 165
57	¹⁵⁵La
58	¹⁵⁶Ce
59	¹⁵⁷Pr
60	¹⁵⁸Nd
61	¹⁵⁹Pm
62	¹⁶⁰Sm	¹⁶⁵Sm
63	¹⁶¹Eu	¹⁶⁵Eu
64	¹⁶²Gd	¹⁶⁵Gd
65	¹⁶³Tb	¹⁶⁵Tb
66	¹⁶⁴Dy	¹⁶⁵Dy
67	¹⁶⁵Ho	¹⁶⁵Ho
68	¹⁶⁶Er	¹⁶⁵Er
69	¹⁶⁷Tm	¹⁶⁵Tm
70	¹⁶⁸Yb	¹⁶⁵Yb
71	¹⁶⁹Lu	¹⁶⁵Lu
72	¹⁷⁰Hf	¹⁶⁵Hf
73	¹⁷¹Ta	¹⁶⁵Ta
74	¹⁷²W	¹⁶⁵W
75	¹⁷³Re	¹⁶⁵Re
76	¹⁷⁴Os	¹⁶⁵Os
77	¹⁷⁵Ir	¹⁶⁵Ir
78	¹⁷⁶Pt
79	¹⁷⁷Au
80	¹⁷⁸Hg
81	¹⁷⁹Tl
82	¹⁸⁰Pb