Isotopes of rhodium

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Isotopes of rhodium (45Rh)
Main isotopes[1] Decay
abun­dance half-life (t1/2) mode pro­duct
99Rh synth 16.1 d
β+
99Ru
101Rh synth 4.07 y ε 101Ru
101mRh synth 4.343 d ε
101Ru
IT
101Rh
102Rh synth 207 d β+
102Ru
β−
102Pd
102mRh synth 3.742 y β+ 102Ru
IT 102Rh
103Rh 100%
stable
105Rh synth 35.341 h β−
105Pd
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    • Naturally occurring

    meta states
    with the most stable being 102mRh (0.141 MeV) with a half-life of about 3.7 years and 101mRh (0.157 MeV) with a half-life of 4.34 days.

    The primary

    beta emission. The primary decay product before 103Rh is ruthenium and the primary product after is palladium
    .

    List of isotopes

    Nuclide
    [n 1]     		Z N Isotopic mass (Da)
    [n 2][n 3]     		Half-life
    [n 4]
    Decay
    mode
    [n 5]
    		 Daughter
    isotope
    [n 6]
    Spin and
    parity
    [n 7][n 4]
    		 Natural abundance (mole fraction)
    Excitation energy[n 4] Normal proportion Range of variation
    89Rh 45 44 88.94884(48)# 10# ms
    [>1.5 μs]     		β+ 89Ru 7/2+#
    90Rh 45 45 89.94287(54)# 15(7) ms
    [12(+9−4) ms]     		β+ 90Ru 0+#
    90mRh 0(500)# keV 1.1(3) s
    [1.0(+3−2) s]     		9+#
    91Rh 45 46 90.93655(43)# 1.74(14) s β+ 91Ru 7/2+#
    91mRh 1.46(11) s (1/2−)
    92Rh 45 47 91.93198(43)# 4.3(13) s β+ 92Ru (6+)
    92mRh 4.66(25) s
    [2.9(+15−8) s]     		(≥6+)
    93Rh 45 48 92.92574(43)# 11.9(7) s β+ 93Ru 9/2+#
    94Rh 45 49 93.92170(48)# 70.6(6) s β+ (98.2%) 94Ru (2+, 4+)
    β+, p (1.79%) 93Tc
    94mRh 300(200)# keV 25.8(2) s β+ 94Ru (8+)
    95Rh 45 50 94.91590(16) 5.02(10) min β+ 95Ru (9/2)+
    95mRh 543.3(3) keV 1.96(4) min
    IT
    (88%)     		95Rh (1/2)−
    β+ (12%) 95Ru
    96Rh 45 51 95.914461(14) 9.90(10) min β+ 96Ru (6+)
    96mRh 52.0(1) keV 1.51(2) min IT (60%) 96Rh (3+)
    β+ (40%) 96Ru
    97Rh 45 52 96.91134(4) 30.7(6) min β+ 97Ru 9/2+
    97mRh 258.85(17) keV 46.2(16) min β+ (94.4%) 97Ru 1/2−
    IT (5.6%) 97Rh
    98Rh 45 53 97.910708(13) 8.72(12) min β+ 98Ru (2)+
    98mRh 60(50)# keV 3.6(2) min IT 98Rh (5+)
    β+ 98Ru
    99Rh 45 54 98.908132(8) 16.1(2) d β+ 99Ru 1/2−
    99mRh 64.3(4) keV 4.7(1) h β+ (99.83%) 99Ru 9/2+
    IT (.16%) 99Rh
    100Rh 45 55 99.908122(20) 20.8(1) h β+ 100Ru 1−
    100m1Rh 107.6(2) keV 4.6(2) min IT (98.3%) 100Rh (5+)
    β+ (1.7%) 100Ru
    100m2Rh 74.78(2) keV 214.0(20) ns (2)+
    100m3Rh 112.0+X keV 130(10) ns (7+)
    101Rh 45 56 100.906164(18) 3.3(3) y EC 101Ru 1/2−
    101mRh 157.32(4) keV 4.34(1) d EC (93.6%) 101Ru 9/2+
    IT (6.4%) 101Rh
    102Rh 45 57 101.906843(5) 207.0(15) d β+ (80%) 102Ru (1−, 2−)
    β− (20%) 102Pd
    102mRh 140.75(8) keV 3.742(10) y β+ (99.77%) 102Ru 6+
    IT (.23%) 102Rh
    103Rh[n 8] 45 58 102.905504(3) Stable 1/2− 1.0000
    103mRh 39.756(6) keV 56.114(9) min IT 103Rh 7/2+
    104Rh 45 59 103.906656(3) 42.3(4) s β− (99.55%) 104Pd 1+
    β+ (.449%) 104Ru
    104mRh 128.967(4) keV 4.34(3) min 5+
    105Rh[n 8] 45 60 104.905694(4) 35.36(6) h β− 105Pd 7/2+
    105mRh 129.781(4) keV 42.9(3) s IT 105Rh 1/2−
    β− 105Pd
    106Rh 45 61 105.907287(8) 29.80(8) s β− 106Pd 1+
    106mRh 136(12) keV 131(2) min β− 106Pd (6)+
    107Rh 45 62 106.906748(13) 21.7(4) min β− 107Pd 7/2+
    107mRh 268.36(4) keV >10 μs 1/2−
    108Rh 45 63 107.90873(11) 16.8(5) s β− 108Pd 1+
    108mRh −60(110) keV 6.0(3) min β− 108Pd (5)(+#)
    109Rh 45 64 108.908737(13) 80(2) s β− 109Pd 7/2+
    110Rh 45 65 109.91114(5) 28.5(15) s β− 110Pd (>3)(+#)
    110mRh −60(50) keV 3.2(2) s β− 110Pd 1+
    111Rh 45 66 110.91159(3) 11(1) s β− 111Pd (7/2+)
    112Rh 45 67 111.91439(6) 3.45(37) s β− 112Pd 1+
    112mRh 330(70) keV 6.73(15) s β− 112Pd (4, 5, 6)
    113Rh 45 68 112.91553(5) 2.80(12) s β− 113Pd (7/2+)
    114Rh 45 69 113.91881(12) 1.85(5) s β− (>99.9%) 114Pd 1+
    β−, n (<.1%) 113Pd
    114mRh 200(150)# keV 1.85(5) s β− 114Pd (4, 5)
    115Rh 45 70 114.92033(9) 0.99(5) s β− 115Pd (7/2+)#
    116Rh 45 71 115.92406(15) 0.68(6) s β− (>99.9%) 116Pd 1+
    β−, n (<.1%) 115Pd
    116mRh 200(150)# keV 570(50) ms β− 116Pd (6−)
    117Rh 45 72 116.92598(54)# 0.44(4) s β− 117Pd (7/2+)#
    118Rh 45 73 117.93007(54)# 310(30) ms β− 118Pd (4−10)(+#)
    119Rh 45 74 118.93211(64)# 190(6) ms β− 119Pd 7/2+#
    β−, n (6.4%) 118Pd
    120Rh 45 75 119.93641(64)# 129.6(42) ms β− 120Pd 8−#
    β−, n (<9.3%) 119Pd
    121Rh 45 76 120.93872(97)# 74(4) ms β− 121Pd 7/2+#
    β−, n (>11%) 120Pd
    122Rh 45 77 121.94321(75)# 51(6) ms β− 122Pd 7−#
    β−, n (<3.9%) 121Pd
    123Rh 45 78 42(4) ms β− 123Pd 7/2+#
    β−, n (>24%) 122Pd
    124Rh 45 79 30(2) ms β− 124Pd 2+#
    β−, n (<31%) 123Pd
    125Rh 45 80 26.5(20) ms β− 125Pd 7/2+#
    126Rh 45 81 19(3) ms β− 126Pd 1−#
    127Rh 45 82 28(14) ms β− 127Pd 7/2+#
    128Rh 45 83 8# ms
    This table header & footer:
    1. ^ mRh – Excited nuclear isomer.
    2. ^ ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
    3. ^ # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
    4. ^ a b c # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
    5. ^ Modes of decay:
      EC: Electron capture
      IT:
      Isomeric transition
      n: Neutron emission
      p: Proton emission
    6. ^ Bold symbol as daughter – Daughter product is stable.
    7. ^ ( ) spin value – Indicates spin with weak assignment arguments.
    8. ^
      Fission product

    References

    1. doi:10.1088/1674-1137/abddae
      .
    2. ^ "Standard Atomic Weights: Rhodium". CIAAW. 2017.
    3. ISSN 1365-3075
      .
    4. doi:10.1595/147106711X555656
      .
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