Rhenium-167m

Properties and data of the isotope ^167mRe.

Contents

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

General data

Name of the isotope:Rhenium-167m; Re-167mSymbol:^167mRe or 167m75ReMass number A:167 (= number of nucleons)Atomic number Z:75 (= number of protons)Neutrons N:92Isotopic mass:166.96261(4) u (atomic weight of Rhenium-167m)
Excitation energy: +x keVNuclide mass:166.9214707 u (calculated nuclear mass without electrons)Mass excess:-34.82856 MeVMass defect:1.421439672 u (per nucleus)Nuclear binding energy:1324.06252583 MeV (per nucleus)
7.92851812 MeV (average binding energy per nucleon)Half-life:3.4(4) sDecay constant λ:0.20386681781175 s^-1Specific activity α:7.395871647767 × 10⁺²⁰ Bq g^-1
19988842291.264 Ci g^-1Spin and parity:
(nuclear angular momentum)

Radioactive Decay

Half-life T_½ = 3.4(4) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁶³Ta	ca. 100 %

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
¹⁶⁷Re		5.9(3) s	(9/2-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 92) and isobaric (same nucleon number A = 167) with Rhenium-167m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 92	Isobar A = 167
53	¹⁴⁵I
54	¹⁴⁶Xe
55	¹⁴⁷Cs
56	¹⁴⁸Ba
57	¹⁴⁹La
58	¹⁵⁰Ce
59	¹⁵¹Pr
60	¹⁵²Nd
61	¹⁵³Pm
62	¹⁵⁴Sm
63	¹⁵⁵Eu	¹⁶⁷Eu
64	¹⁵⁶Gd	¹⁶⁷Gd
65	¹⁵⁷Tb	¹⁶⁷Tb
66	¹⁵⁸Dy	¹⁶⁷Dy
67	¹⁵⁹Ho	¹⁶⁷Ho
68	¹⁶⁰Er	¹⁶⁷Er
69	¹⁶¹Tm	¹⁶⁷Tm
70	¹⁶²Yb	¹⁶⁷Yb
71	¹⁶³Lu	¹⁶⁷Lu
72	¹⁶⁴Hf	¹⁶⁷Hf
73	¹⁶⁵Ta	¹⁶⁷Ta
74	¹⁶⁶W	¹⁶⁷W
75	¹⁶⁷Re	¹⁶⁷Re
76	¹⁶⁸Os	¹⁶⁷Os
77	¹⁶⁹Ir	¹⁶⁷Ir
78	¹⁷⁰Pt	¹⁶⁷Pt
79	¹⁷¹Au
80	¹⁷²Hg