Rhodium-101

Properties and data of the isotope ¹⁰¹Rh.

Contents

General data

Name of the isotope:Rhodium-101; Rh-101Symbol:¹⁰¹Rh or 10145RhMass number A:101 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:56Isotopic mass:100.906159(6) u (atomic weight of Rhodium-101)Nuclide mass:100.8814742 u (calculated nuclear mass without electrons)Mass excess:-87.41233 MeVMass defect:0.931202736 u (per nucleus)Nuclear binding energy:867.40976137 MeV (per nucleus)
8.58821546 MeV (average binding energy per nucleon)Separation energy:S_N = 9.893(19) MeV (first neutron)
S_P = 5.474(6) MeV (first proton)Half-life:3.3(3) aDecay constant λ:6.658474356963 × 10^-9 s^-1Specific activity α:40098270489914 Bq g^-1
1083.7370402679 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Year of discovery:1948

Radioactive Decay

Half-life T_½ = 3.3(3) a respectively 1.041 × 10⁸ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC	¹⁰¹Ru	100 %	0.546(6) MeV

Parent Nuclides

Direct parent isotope is: ¹⁰¹Pd.

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
^101mRh	157.32(3) keV	4.34(1) d	9/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 56) and isobaric (same nucleon number A = 101) with Rhodium-101. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 56	Isobar A = 101
31	⁸⁷Ga
32	⁸⁸Ge
33	⁸⁹As
34	⁹⁰Se
35	⁹¹Br
36	⁹²Kr	¹⁰¹Kr
37	⁹³Rb	¹⁰¹Rb
38	⁹⁴Sr	¹⁰¹Sr
39	⁹⁵Y	¹⁰¹Y
40	⁹⁶Zr	¹⁰¹Zr
41	⁹⁷Nb	¹⁰¹Nb
42	⁹⁸Mo	¹⁰¹Mo
43	⁹⁹Tc	¹⁰¹Tc
44	¹⁰⁰Ru	¹⁰¹Ru
45	¹⁰¹Rh	¹⁰¹Rh
46	¹⁰²Pd	¹⁰¹Pd
47	¹⁰³Ag	¹⁰¹Ag
48	¹⁰⁴Cd	¹⁰¹Cd
49	¹⁰⁵In	¹⁰¹In
50	¹⁰⁶Sn	¹⁰¹Sn
51	¹⁰⁷Sb
52	¹⁰⁸Te
53	¹⁰⁹I
54	¹¹⁰Xe