Rhodium-89

Properties and data of the isotope ⁸⁹Rh.

Contents

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

General data

Name of the isotope:Rhodium-89; Rh-89Symbol:⁸⁹Rh or 8945RhMass number A:89 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:44Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):0.97777777777778 (= neutron-proton ratio)Neutron excess (N-Z):-1Isotopic mass:88.95077(39) u (atomic weight of Rhodium-89)Nuclide mass:88.9260852 u (calculated nuclear mass without electrons)Mass excess:-45.85745 MeVMass defect:0.78261274400001 u (per nucleus)Nuclear binding energy:728.99907536 MeV (per nucleus)
8.19100085 MeV (average binding energy per nucleon)Separation energy:S_N = 17.07(54) MeV (first neutron)Half-life:120 nsDecay constant λ:5776226.5046662 s^-1Specific activity α:3.952869278409 × 10⁺²⁸ Bq g^-1
1.068343048218 × 10⁺¹⁸ Ci g^-1Spin and parity:
(nuclear angular momentum)7/2+Mirror nucleus:Ruthenium-89Year of discovery:1995

Radioactive Decay

Half-life T_½ = 120 ns respectively 1.20 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy
EC/β⁺	⁸⁹Ru	?	12.40(47) MeV
EC, p	⁸⁸Tc	?
p	⁸⁸Ru	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 89) with Rhodium-89. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 44	Isobar A = 89
22	⁶⁶Ti
23	⁶⁷V
24	⁶⁸Cr
25	⁶⁹Mn
26	⁷⁰Fe
27	⁷¹Co
28	⁷²Ni
29	⁷³Cu
30	⁷⁴Zn
31	⁷⁵Ga
32	⁷⁶Ge	⁸⁹Ge
33	⁷⁷As	⁸⁹As
34	⁷⁸Se	⁸⁹Se
35	⁷⁹Br	⁸⁹Br
36	⁸⁰Kr	⁸⁹Kr
37	⁸¹Rb	⁸⁹Rb
38	⁸²Sr	⁸⁹Sr
39	⁸³Y	⁸⁹Y
40	⁸⁴Zr	⁸⁹Zr
41	⁸⁵Nb	⁸⁹Nb
42	⁸⁶Mo	⁸⁹Mo
43	⁸⁷Tc	⁸⁹Tc
44	⁸⁸Ru	⁸⁹Ru
45	⁸⁹Rh	⁸⁹Rh
46	⁹⁰Pd