Rhenium-173

Properties and data of the isotope ¹⁷³Re.

Content

General data

Name of the isotope:Rhenium-173; Re-173Symbol:¹⁷³Re or 17375ReMass number A:173 (= number of nucleons)Atomic number Z:75 (= number of protons)Neutrons N:98Isotopic mass:172.95324(3) u (atomic weight of Rhenium-173)Nuclide mass:172.9121007 u (calculated nuclear mass without electrons)Mass excess:-43.55666 MeVMass defect:1.482799168 u (per nucleus)Nuclear binding energy:1381.2185282 MeV (per nucleus)
7.98392213 MeV (average binding energy per nucleon)Separation energy:S_N = 10.09(5) MeV (first neutron)
S_P = 1.75(4) MeV (first proton)Half-life:1.98(26) minDecay constant λ:0.0058345722269356 s^-1Specific activity α:2.042826500469 × 10⁺¹⁹ Bq g^-1
552115270.39724 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1986

Radioactive Decay

Half-life T_½ = 1.98(26) min (minutes) respectively 1.188 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹⁷³W	100 %	5.17(4) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁷⁷Ir, ¹⁷³Os.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 98) and isobaric (same nucleon number A = 173) with Rhenium-173. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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