Rhodium-94m

Properties and data of the isotope ^94mRh.

Contents

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

General data

Name of the isotope:Rhodium-94m; Rh-94mSymbol:^94mRh or 94m45RhMass number A:94 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:49Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.0888888888889 (= neutron-proton ratio)Neutron excess (N-Z):4Excitation energy:+x keVIsotopic mass:93.921730(4) u (atomic weight of Rhodium-94m)Nuclide mass:93.8970452 u (calculated nuclear mass without electrons)Mass excess:-72.90804 MeVMass defect:0.854977324 u (per nucleus)Nuclear binding energy:796.40624744 MeV (per nucleus)
8.47240689 MeV (average binding energy per nucleon)Half-life:25.8(2) sDecay constant λ:0.026866169789145 s^-1Specific activity α:1.739697406851 × 10⁺²⁰ Bq g^-1
4701884883.383 Ci g^-1Spin and parity:
(nuclear angular momentum)(8+)Year of discovery:1979

Radioactive Decay

Half-life T_½ = 25.8(2) s respectively 2.58 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁹⁴Ru	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
⁹⁴Rh		70.6(6) s	(4+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 49) and isobaric (same nucleon number A = 94) with Rhodium-94m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 49	Isobar A = 94
27	⁷⁶Co
28	⁷⁷Ni
29	⁷⁸Cu
30	⁷⁹Zn
31	⁸⁰Ga
32	⁸¹Ge
33	⁸²As
34	⁸³Se	⁹⁴Se
35	⁸⁴Br	⁹⁴Br
36	⁸⁵Kr	⁹⁴Kr
37	⁸⁶Rb	⁹⁴Rb
38	⁸⁷Sr	⁹⁴Sr
39	⁸⁸Y	⁹⁴Y
40	⁸⁹Zr	⁹⁴Zr
41	⁹⁰Nb	⁹⁴Nb
42	⁹¹Mo	⁹⁴Mo
43	⁹²Tc	⁹⁴Tc
44	⁹³Ru	⁹⁴Ru
45	⁹⁴Rh	⁹⁴Rh
46	⁹⁵Pd	⁹⁴Pd
47	⁹⁶Ag	⁹⁴Ag
48	⁹⁷Cd	⁹⁴Cd
49	⁹⁸In
50	⁹⁹Sn