Holmium-167

Properties and data of the isotope ¹⁶⁷Ho.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Holmium isotopes (and general data sources).

General data

Name of the isotope:Holmium-167; Ho-167Symbol:¹⁶⁷Ho or 16767HoMass number A:167 (= number of nucleons)Atomic number Z:67 (= number of protons)Neutrons N:100Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.4925373134328 (= neutron-proton ratio)Neutron excess (N-Z):33Isotopic mass:166.933139(6) u (atomic weight of Holmium-167)Nuclide mass:166.8963873 u (calculated nuclear mass without electrons)Mass excess:-62.28062 MeVMass defect:1.457629744 u (per nucleus)Nuclear binding energy:1357.77336076 MeV (per nucleus)
8.13037941 MeV (average binding energy per nucleon)Separation energy:S_N = 7.281(5) MeV (first neutron)
S_P = 6.985(5) MeV (first proton)Half-life:3.1(1) hDecay constant λ:6.210996241576 × 10^-5 s^-1Specific activity α:2.253222545018 × 10⁺¹⁷ Bq g^-1
6089790.662213 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Year of discovery:1955

Radioactive Decay

Half-life T_½ = 3.1(1) h (hours) respectively 1.1160 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁶⁷Er	100 %	1.011(5) MeV

Parent Nuclides

Direct parent isotope is: ¹⁶⁷Dy.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 100) and isobaric (same nucleon number A = 167) with Holmium-167. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 100	Isobar A = 167
58	¹⁵⁸Ce
59	¹⁵⁹Pr
60	¹⁶⁰Nd
61	¹⁶¹Pm
62	¹⁶²Sm
63	¹⁶³Eu	¹⁶⁷Eu
64	¹⁶⁴Gd	¹⁶⁷Gd
65	¹⁶⁵Tb	¹⁶⁷Tb
66	¹⁶⁶Dy	¹⁶⁷Dy
67	¹⁶⁷Ho	¹⁶⁷Ho
68	¹⁶⁸Er	¹⁶⁷Er
69	¹⁶⁹Tm	¹⁶⁷Tm
70	¹⁷⁰Yb	¹⁶⁷Yb
71	¹⁷¹Lu	¹⁶⁷Lu
72	¹⁷²Hf	¹⁶⁷Hf
73	¹⁷³Ta	¹⁶⁷Ta
74	¹⁷⁴W	¹⁶⁷W
75	¹⁷⁵Re	¹⁶⁷Re
76	¹⁷⁶Os	¹⁶⁷Os
77	¹⁷⁷Ir	¹⁶⁷Ir
78	¹⁷⁸Pt	¹⁶⁷Pt
79	¹⁷⁹Au
80	¹⁸⁰Hg
81	¹⁸¹Tl
82	¹⁸²Pb