Rhenium-184
Properties and data of the isotope 184Re.
See also: List of individual Rhenium isotopes (and general data sources).
General data
Name of the isotope:Rhenium-184; Re-184Symbol:184Re or 18475ReMass number A:184 (= number of nucleons)Atomic number Z:75 (= number of protons)Neutrons N:109Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4533333333333 (= neutron-proton ratio)Neutron excess (N-Z):34Isotopic mass:183.952528(5) u (atomic weight of Rhenium-184)Nuclide mass:183.9113887 u (calculated nuclear mass without electrons)Mass excess:-44.21988 MeVMass defect:1.578825244 u (per nucleus)Nuclear binding energy:1470.66624183 MeV (per nucleus)
7.99275131 MeV (average binding energy per nucleon)Separation energy:SN = 6.481(9) MeV (first neutron)
SP = 5.143(4) MeV (first proton)Half-life:35.4(7) dDecay constant λ:2.266253336733 × 10-7 s-1Specific activity α:7.457757824104 × 10+14 Bq g-1
20156.102227308 Ci g-1Spin and parity:
(nuclear angular momentum)3(-)Magnetic dipole moment:μ(μN) = + 2.53(5)Quadrupole moment Q:+ 2.80(2) barn (100 fm2)Nuclear g-factor:gl = 0.84333333333333Year of discovery:1940
Radioactive Decay
Half-life T½ = 35.4(7) d respectively 3.058560 × 106 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 184W | 100 % | 1.486(4) MeV | |
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 |
|---|
| 184mRe | 188.0463(17) keV | 169(8) d | 8(+) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 109) and isobaric (same nucleon number A = 184) with Rhenium-184. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 109 | Isobar A = 184 |
|---|
| 68 | 177Er | |
| 69 | 178Tm | |
| 70 | 179Yb | 184Yb |
| 71 | 180Lu | 184Lu |
| 72 | 181Hf | 184Hf |
| 73 | 182Ta | 184Ta |
| 74 | 183W | 184W |
| 75 | 184Re | 184Re |
| 76 | 185Os | 184Os |
| 77 | 186Ir | 184Ir |
| 78 | 187Pt | 184Pt |
| 79 | 188Au | 184Au |
| 80 | 189Hg | 184Hg |
| 81 | 190Tl | 184Tl |
| 82 | 191Pb | 184Pb |
| 83 | 192Bi | 184Bi |
| 84 | 193Po | |
| 85 | 194At | |
| 86 | 195Rn | |
External data and identifiers
Last update: 2020-10-21
Perma link: https://www.chemlin.org/isotope/rhenium-184
© 1996 - 2026 ChemLin
