Rhodium-108m

Properties and data of the isotope ^108mRh.

Contents

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

General data

Name of the isotope:Rhodium-108m; Rh-108mSymbol:^108mRh or 108m45RhMass number A:108 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:63Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4 (= neutron-proton ratio)Neutron excess (N-Z):18Excitation energy:+x keVIsotopic mass:107.908715(15) u (atomic weight of Rhodium-108m)Nuclide mass:107.8840302 u (calculated nuclear mass without electrons)Mass excess:-85.03143 MeVMass defect:0.98930114800001 u (per nucleus)Nuclear binding energy:921.52808356 MeV (per nucleus)
8.53266744 MeV (average binding energy per nucleon)Half-life:6.0(3) minDecay constant λ:0.0019254088348887 s^-1Specific activity α:1.083652637071 × 10⁺¹⁹ Bq g^-1
292879091.10046 Ci g^-1Spin and parity:
(nuclear angular momentum)(5+)

Radioactive Decay

Half-life T_½ = 6.0(3) min (minutes) respectively 3.60 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰⁸Pd	< 100 %
Iso	¹⁰⁸Rh	?

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
¹⁰⁸Rh		16.8(5) s	1+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 63) and isobaric (same nucleon number A = 108) with Rhodium-108m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 63	Isobar A = 108
35	⁹⁸Br
36	⁹⁹Kr
37	¹⁰⁰Rb
38	¹⁰¹Sr
39	¹⁰²Y	¹⁰⁸Y
40	¹⁰³Zr	¹⁰⁸Zr
41	¹⁰⁴Nb	¹⁰⁸Nb
42	¹⁰⁵Mo	¹⁰⁸Mo
43	¹⁰⁶Tc	¹⁰⁸Tc
44	¹⁰⁷Ru	¹⁰⁸Ru
45	¹⁰⁸Rh	¹⁰⁸Rh
46	¹⁰⁹Pd	¹⁰⁸Pd
47	¹¹⁰Ag	¹⁰⁸Ag
48	¹¹¹Cd	¹⁰⁸Cd
49	¹¹²In	¹⁰⁸In
50	¹¹³Sn	¹⁰⁸Sn
51	¹¹⁴Sb	¹⁰⁸Sb
52	¹¹⁵Te	¹⁰⁸Te
53	¹¹⁶I	¹⁰⁸I
54	¹¹⁷Xe
55	¹¹⁸Cs
56	¹¹⁹Ba
57	¹²⁰La
58	¹²¹Ce
59	¹²²Pr