Hafnium-175

Properties and data of the isotope ¹⁷⁵Hf.

Contents

General data

Name of the isotope:Hafnium-175; Hf-175Symbol:¹⁷⁵Hf or 17572HfMass number A:175 (= number of nucleons)Atomic number Z:72 (= number of protons)Neutrons N:103Isotopic mass:174.9415115(24) u (atomic weight of Hafnium-175)Nuclide mass:174.9020175 u (calculated nuclear mass without electrons)Mass excess:-54.48169 MeVMass defect:1.514377152 u (per nucleus)Nuclear binding energy:1410.63323083 MeV (per nucleus)
8.06076132 MeV (average binding energy per nucleon)Separation energy:S_N = 6.7085(4) MeV (first neutron)
S_P = 6.2004(22) MeV (first proton)Half-life:70(2) dDecay constant λ:1.146076687433 × 10^-7 s^-1Specific activity α:3.966571981618 × 10⁺¹⁴ Bq g^-1
10720.464815185 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2(-)Magnetic dipole moment:μ(μ_N) = - 0.539(32)Quadrupole moment Q:+ 2.80 barn (100 fm²)Nuclear g-factor:g_l = -0.2156Charge radius:5.3191(36) femtometer fmYear of discovery:1949

Radioactive Decay

Half-life T_½ = 70(2) d respectively 6.048 × 10⁶ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC	¹⁷⁵Lu	100 %	0.6839(26) MeV

Parent Nuclides

Direct parent isotope is: ¹⁷⁵Ta.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 103) and isobaric (same nucleon number A = 175) with Hafnium-175. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 103	Isobar A = 175
60	¹⁶³Nd
62	¹⁶⁵Sm
63	¹⁶⁶Eu
64	¹⁶⁷Gd
65	¹⁶⁸Tb
66	¹⁶⁹Dy
67	¹⁷⁰Ho	¹⁷⁵Ho
68	¹⁷¹Er	¹⁷⁵Er
69	¹⁷²Tm	¹⁷⁵Tm
70	¹⁷³Yb	¹⁷⁵Yb
71	¹⁷⁴Lu	¹⁷⁵Lu
72	¹⁷⁵Hf	¹⁷⁵Hf
73	¹⁷⁶Ta	¹⁷⁵Ta
74	¹⁷⁷W	¹⁷⁵W
75	¹⁷⁸Re	¹⁷⁵Re
76	¹⁷⁹Os	¹⁷⁵Os
77	¹⁸⁰Ir	¹⁷⁵Ir
78	¹⁸¹Pt	¹⁷⁵Pt
79	¹⁸²Au	¹⁷⁵Au
80	¹⁸³Hg	¹⁷⁵Hg
81	¹⁸⁴Tl
82	¹⁸⁵Pb
83	¹⁸⁶Bi
84	¹⁸⁷Po