Rhodium-105

Properties and data of the isotope ¹⁰⁵Rh.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Rhodium-105; Rh-105Symbol:¹⁰⁵Rh or 10545RhMass number A:105 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:60Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.3333333333333 (= neutron-proton ratio)Neutron excess (N-Z):15Isotopic mass:104.9056878(27) u (atomic weight of Rhodium-105)Nuclide mass:104.881003 u (calculated nuclear mass without electrons)Mass excess:-87.85125 MeVMass defect:0.9663336 u (per nucleus)Nuclear binding energy:900.1339504 MeV (per nucleus)
8.57270429 MeV (average binding energy per nucleon)Separation energy:S_N = 8.963(3) MeV (first neutron)
S_P = 7.0445(28) MeV (first proton)Half-life:35.36(6) hDecay constant λ:5.445160732151 × 10^-6 s^-1Specific activity α:3.15303124365 × 10⁺¹⁶ Bq g^-1
852170.60639324 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2+Magnetic dipole moment:μ(μ_N) = 4.41(5)Nuclear g-factor:g_l = 1.26Year of discovery:1945

Radioactive Decay

Half-life T_½ = 35.36(6) h (hours) respectively 1.27296 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰⁵Pd	100 %	0.566(23) MeV

Parent Nuclides

Direct parent isotope is: ¹⁰⁵Ru.

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
^105mRh	129.782(4) keV	42.9(3) s	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 60) and isobaric (same nucleon number A = 105) with Rhodium-105. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 60	Isobar A = 105
34	⁹⁴Se
35	⁹⁵Br
36	⁹⁶Kr
37	⁹⁷Rb
38	⁹⁸Sr	¹⁰⁵Sr
39	⁹⁹Y	¹⁰⁵Y
40	¹⁰⁰Zr	¹⁰⁵Zr
41	¹⁰¹Nb	¹⁰⁵Nb
42	¹⁰²Mo	¹⁰⁵Mo
43	¹⁰³Tc	¹⁰⁵Tc
44	¹⁰⁴Ru	¹⁰⁵Ru
45	¹⁰⁵Rh	¹⁰⁵Rh
46	¹⁰⁶Pd	¹⁰⁵Pd
47	¹⁰⁷Ag	¹⁰⁵Ag
48	¹⁰⁸Cd	¹⁰⁵Cd
49	¹⁰⁹In	¹⁰⁵In
50	¹¹⁰Sn	¹⁰⁵Sn
51	¹¹¹Sb	¹⁰⁵Sb
52	¹¹²Te	¹⁰⁵Te
53	¹¹³I
54	¹¹⁴Xe
55	¹¹⁵Cs
56	¹¹⁶Ba
57	¹¹⁷La