Ruthenium-101

Properties and data of the isotope ¹⁰¹Ru.

Contents

General data

Name of the isotope:Ruthenium-101; Ru-101Symbol:¹⁰¹Ru or 10144RuMass number A:101 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:57Isotopic mass:100.905577(8) u (atomic weight of Ruthenium-101)Nuclide mass:100.8814407 u (calculated nuclear mass without electrons)Mass excess:-87.95446 MeVMass defect:0.93262462000001 u (per nucleus)Nuclear binding energy:868.73423778 MeV (per nucleus)
8.60132909 MeV (average binding energy per nucleon)Separation energy:S_N = 6.80204(24) MeV (first neutron)
S_P = 9.2261(14) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)5/2+Magnetic dipole moment:μ(μ_N) = - 0.718(6)Charge radius:4.4606(20) femtometer fmYear of discovery:1931

Parent Nuclides

Direct parent isotopes are: ¹⁰¹Rh, ¹⁰¹Tc.

Occurrence

Comparison of the natural Ruthenium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Ruthenium Isotopic mixture	101.07 u	100 %
Isotope ⁹⁶Ru	95.907590(3) u	5.54(14) %	stable	0+
Isotope ⁹⁸Ru	97.90529(5) u	1.87(3) %	stable	0+
Isotope ⁹⁹Ru	98.905934(7) u	12.76(14) %	stable	5/2+
Isotope ¹⁰⁰Ru	99.904214(7) u	12.60(7) %	stable	0+
Isotope ¹⁰¹Ru	100.905577(8) u	17.06(2) %	stable	5/2+
Isotope ¹⁰²Ru	101.904344(8) u	31.55(14) %	stable	0+
Isotope ¹⁰⁴Ru	103.90543(2) u	18.62(27) %	stable	0+

NMR data

Nuclear magnetic properties of the NMR active Nuclide ¹⁰¹Ru

Isotope:¹⁰¹Ru-NMRQuantity:17.06(2) %Spin:5/2+Nuclearmagnetic moment
μ/μ_N:- 0.718(6)Gyromagnetic ratio γ:- 1.3773 · 10⁷ rad T^-1 s^-1Nuclear g-factor:g_l = -0.2872Quadrupole moment Q:+ 0.457(23) barn (100 fm²)Resonance frequency:v₀ = 2.1916 at 1 TRelative Sensitivity:0.00159 (H₀ = const.)
0.6005 (v₀ = const.)
[related to ¹H = 1.000]

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
^101mRu	527.56(10) keV	17.5(4) μs	11/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 57) and isobaric (same nucleon number A = 101) with Ruthenium-101. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 57	Isobar A = 101
32	⁸⁹Ge
33	⁹⁰As
34	⁹¹Se
35	⁹²Br
36	⁹³Kr	¹⁰¹Kr
37	⁹⁴Rb	¹⁰¹Rb
38	⁹⁵Sr	¹⁰¹Sr
39	⁹⁶Y	¹⁰¹Y
40	⁹⁷Zr	¹⁰¹Zr
41	⁹⁸Nb	¹⁰¹Nb
42	⁹⁹Mo	¹⁰¹Mo
43	¹⁰⁰Tc	¹⁰¹Tc
44	¹⁰¹Ru	¹⁰¹Ru
45	¹⁰²Rh	¹⁰¹Rh
46	¹⁰³Pd	¹⁰¹Pd
47	¹⁰⁴Ag	¹⁰¹Ag
48	¹⁰⁵Cd	¹⁰¹Cd
49	¹⁰⁶In	¹⁰¹In
50	¹⁰⁷Sn	¹⁰¹Sn
51	¹⁰⁸Sb
52	¹⁰⁹Te
53	¹¹⁰I
54	¹¹¹Xe
55	¹¹²Cs