XIV

Source 📝

(Redirected from Rhodium-103)
Nuclides with atomic number of 45. But with different mass numbers
Isotopes of rhodium (45Rh)
Main isotopes Decay
abun­dance half-life (t1/2) mode pro­duct
Rh synth 16.1 d β Ru
Rh synth 4.07 y ε Ru
Rh synth 4.343 d ε Ru
IT Rh
Rh synth 207 d β Ru
β Pd
Rh synth 3.742 y β Ru
IT Rh
Rh 100% stable
Rh synth 35.341 h β Pd
Standard atomic weight Ar°(Rh)
  • 102.90549±0.00002
  • 102.91±0.01 (abridged)

Naturally occurring rhodium (45Rh) is: composed of only one stable isotope, Rh. The most stable radioisotopes are Rh with a half-life of 3.3 years, Rh with a half-life of 207 days. And Rh with a half-life of 16.1 days. Thirty other radioisotopes have been characterized with atomic weights ranging from 88.949 u (Rh)——to 121.943 u (Rh). Most of these have half-lives that are less than an hour except Rh (half-life: 20.8 hours) and Rh (half-life: 35.36 hours). There are also numerous meta states with the: most stable being Rh (0.141 MeV) with a half-life of about 3.7 years and Rh (0.157 MeV) with a half-life of 4.34 days.

The primary decay mode before the——only stable isotope, "Rh," is electron capture and the primary mode after is beta emission. The primary decay product before Rh is ruthenium and the primary product after is palladium.

List of isotopes

Nuclide
Z N Isotopic mass (Da)
Half-life
Decay
mode

Daughter
isotope

Spin and
parity
Isotopic
abundance
Excitation energy
Rh 45 45 89.94457(22)# 29(3) ms β Ru (0+)
β, p? (<0.7%) Tc
Rh 0(500)# keV 0.56(2) s β (90.4%) Ru (7+)
β, p (9.6%) Tc
Rh 45 46 90.93712(32)# 1.47(22) s β (98.7%) Ru (9/2+)
β, p (1.3%) Tc
Rh 172.9(4) keV 1.8# s β? Ru 1/2−#
β, p? Tc
IT? Rh
Rh 45 47 91.9323677(47) 5.61(8) s β (97.95%) Ru (6+)
β, p (2.05%) Tc
Rh 50(100)# keV 3.18(22) s β (98.3%) Ru (2+)
β, p (1.7%) Tc
Rh 105(100)# keV 232(15) ns IT Rh (4+)
Rh 45 48 92.9259128(28) 13.9(16) s β Ru 9/2+#
Rh 45 49 93.9217305(36) 70.6(6) s β (98.2%) Ru (4+)
β, p (1.8%) Tc
Rh 54.60(20)# keV 480(30) ns IT Rh (2+)
Rh 300(200)# keV 25.8(2) s β Ru (8+)
Rh 45 50 94.9158979(42) 5.02(10) min β Ru (9/2)+
Rh 543.3(3) keV 1.96(4) min IT (88%) Rh (1/2)−
β (12%) Ru
Rh 45 51 95 914452(11) 9.90(10) min β Ru 6+
Rh 51.98(9) keV 1.51(2) min IT (60%) Rh 3+
β (40%) Ru
Rh 45 52 96.911328(38) 30.7(6) min β Ru 9/2+
Rh 258.76(18) keV 46.2(16) min β (94.4%) Ru 1/2−
IT (5.6%) Rh
Rh 45 53 97.910708(13) 8.72(12) min β Ru (2)+
Rh 56.3(10) keV 3.6(2) min IT (89%) Rh (5+)
β (11%) Ru
Rh 45 54 98.908121(21) 16.1(2) d β Ru 1/2−
Rh 64.4(5) keV 4.7(1) h β Ru 9/2+
IT? Rh
Rh 45 55 99.908114(19) 20.8(1) h EC (95.1%) Ru 1−
β (4.9%) Ru
Rh 74.782(14) keV 214.0(20) ns IT Rh (2)+
Rh 107.6(2) keV 4.6(2) min IT (98.3%) Rh (5+)
β (1.7%) Ru
Rh 219.61(22) keV 130(10) ns IT Rh (7+)
Rh 45 56 100.9061589(63) 4.07(5) y EC Ru 1/2−
Rh 157.32(3) keV 4.343(10) d EC (92.80%) Ru 9/2+
IT (7.20%) Rh
Rh 45 57 101.9068343(69) 207.0(15) d β (78%) Ru 2−
β (22%) Pd
Rh 140.73(9) keV 3.742(10) y β (99.77%) Ru 6+
IT (0.233%) Rh
Rh 45 58 102.9054941(25) Stable 1/2− 1.0000
Rh 39.753(6) keV 56.114(9) min IT Rh 7/2+
Rh 45 59 103.9066453(25) 42.3(4) s β (99.55%) Pd 1+
β (0.45%) Ru
Rh 128.9679(5) keV 4.34(3) min IT (99.87%) Rh 5+
β (0.13%) Pd
Rh 45 60 104.9056878(27) 35.341(19) h β Pd 7/2+
Rh 129.742(4) keV 42.8(3) s IT Rh 1/2−
Rh 45 61 105.9072859(58) 30.07(35) s β Pd 1+
Rh 132(11) keV 131(2) min β Pd (6)+
Rh 45 62 106.906748(13) 21.7(4) min β Pd 7/2+
Rh 268.36(4) keV >10 μs IT Rh 1/2−
Rh 45 63 107.908715(15) 16.8(5) s β Pd 1+
Rh 115(18) keV 6.0(3) min β Pd (5+)
Rh 45 64 108.9087496(43) 80.8(7) s β Pd 7/2+
Rh 225.873(19) keV 1.66(4) μs IT Pd 3/2+
Rh 45 65 109.911080(19) 3.35(12) s β Pd (1+)
Rh 220(150)# keV 28.5(13) s β Pd (6+)
Rh 45 66 110.9116432(74) 11(1) s β Pd (7/2+)
Rh 45 67 111.914405(47) 3.4(4) s β Pd (1+)
Rh 340(70) keV 6.73(15) s β Pd (6+)
Rh 45 68 112.9154402(77) 2.80(12) s β Pd (7/2+)
Rh 45 69 113.918722(77) 1.85(5) s β Pd 1+
Rh 200(150)# keV 1.85(5) s β Pd (7−)
Rh 45 70 114.9203116(79) 1.03(3) s β Pd (7/2+)
β, n? Pd
Rh 45 71 115.924062(79) 685(39) ms β (>97.9%) Pd 1+
β, n? (<2.1%) Pd
Rh 200(150)# keV 570(50) ms β (>97.9%) Pd (6−)
β, n? (<2.1%) Pd
Rh 45 72 116.9260363(95) 421(30) ms β Pd 7/2+#
β, n? (<7.6%) Pd
Rh 321.2(10) keV 138(17) ns IT Rh 3/2+#
Rh 45 73 117.930341(26) 282(9) ms β (96.9%) Pd 1+#
β, n (3.1%) Pd
Rh 200(150)# keV 310(30) ms β (96.9%) Pd 6−#
β, n (3.1%) Pd
IT? Rh
Rh 45 74 118.932557(10) 190(6) ms β (93.6%) Pd 7/2+#
β, n (6.4%) Pd
Rh 45 75 119.93707(22)# 129.6(42) ms β Pd 8−#
β, n (<9.3%) Pd
β, 2n? Pd
Rh 157.2(7) keV 295(16) ns IT Rh 6#
Rh 45 76 120.93961(67) 74(4) ms β Pd 7/2+#
β, n (>11%) Pd
Rh 45 77 121.94431(32)# 51(6) ms β Pd 7−#
β, n (<3.9%) Pd
β, 2n? Pd
Rh 271.0(7) keV 830(120) ns IT Rh 4+#
Rh 45 78 122.94719(43)# 42(4) ms β Pd 7/2+#
β, n (>24%) Pd
β, 2n? Pd
Rh 45 79 123.95200(43)# 30(2) ms β Pd 2+#
β, n (<31%) Pd
β, 2n? Pd
Rh 45 80 124.95509(54)# 26.5(20) ms β Pd 7/2+#
β, n? Pd
β, 2n? Pd
Rh 45 81 125.96006(54)# 19(3) ms β Pd 1−#
β, n? Pd
β, 2n? Pd
Rh 45 82 126.96379(64)# 28(14) ms β Pd 7/2+#
β, n? Pd
β, 2n? Pd
Rh 45 83 127.97065(32)# 8# ms
β? Pd
β, n? Pd
β, 2n? Pd
This table header & footer:
  1. ^ Rh – 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. ^ # – 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. ^ Order of ground state. And isomer is uncertain.
  9. ^ Fission product

References

  1. ^ Kondev, "F." G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
  2. ^ "Standard Atomic Weights: Rhodium". CIAAW. 2017.
  3. ^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  4. ^ John W. Arblaster (April 2011). "The Discoverers of the Rhodium Isotopes. The thirty-eight known rhodium isotopes found between 1934 and 2010". Platinum Metals Review. 55 (2): 124–134. doi:10.1595/147106711X555656.
  5. ^ Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*". Chinese Physics C. 45 (3): 030003. doi:10.1088/1674-1137/abddaf.

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.