Rhodium-104m

Properties and data of the isotope ^104mRh.

Contents

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

General data

Name of the isotope:Rhodium-104m; Rh-104mSymbol:^104mRh or 104m45RhMass number A:104 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:59Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3111111111111 (= neutron-proton ratio)Neutron excess (N-Z):14Excitation energy:128.9679(5) keVIsotopic mass:103.9066453(25) u (atomic weight of Rhodium-104m)Nuclide mass:103.8819605 u (calculated nuclear mass without electrons)Mass excess:-86.95934 MeVMass defect:0.95671118400001 u (per nucleus)Nuclear binding energy:891.17072763 MeV (per nucleus)
8.5689493 MeV (average binding energy per nucleon)Half-life:4.34(3) minDecay constant λ:0.0026618555321042 s^-1Specific activity α:1.556317375061 × 10⁺¹⁹ Bq g^-1
420626317.58419 Ci g^-1Spin and parity:
(nuclear angular momentum)5+

Radioactive Decay

Half-life T_½ = 4.34(3) min (minutes) respectively 2.604 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹⁰⁴Rh	99.87(1) %
β^-	¹⁰⁴Pd	0.13(1) %

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
¹⁰⁴Rh		42.3(4) s	1+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 104) with Rhodium-104m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 59	Isobar A = 104
33	⁹²As
34	⁹³Se
35	⁹⁴Br
36	⁹⁵Kr
37	⁹⁶Rb
38	⁹⁷Sr	¹⁰⁴Sr
39	⁹⁸Y	¹⁰⁴Y
40	⁹⁹Zr	¹⁰⁴Zr
41	¹⁰⁰Nb	¹⁰⁴Nb
42	¹⁰¹Mo	¹⁰⁴Mo
43	¹⁰²Tc	¹⁰⁴Tc
44	¹⁰³Ru	¹⁰⁴Ru
45	¹⁰⁴Rh	¹⁰⁴Rh
46	¹⁰⁵Pd	¹⁰⁴Pd
47	¹⁰⁶Ag	¹⁰⁴Ag
48	¹⁰⁷Cd	¹⁰⁴Cd
49	¹⁰⁸In	¹⁰⁴In
50	¹⁰⁹Sn	¹⁰⁴Sn
51	¹¹⁰Sb	¹⁰⁴Sb
52	¹¹¹Te
53	¹¹²I
54	¹¹³Xe
55	¹¹⁴Cs
56	¹¹⁵Ba
57	¹¹⁶La