Isotopes of rhodium

Naturally occurring rhodium (₄₅Rh) is composed of only one stable isotope, ¹⁰³Rh. The most stable radioisotopes are ¹⁰¹Rh with a half-life of 3.3 years, ¹⁰²Rh with a half-life of 207 days, and ⁹⁹Rh with a half-life of 16.1 days. Thirty other radioisotopes have been characterized with atomic weights ranging from 88.949 u (⁸⁹Rh) to 121.943 u (¹²²Rh). Most of these have half-lives that are less than an hour except ¹⁰⁰Rh (half-life: 20.8 hours) and ¹⁰⁵Rh (half-life: 35.36 hours). There are also numerous 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 decay mode before the only stable isotope, ¹⁰³Rh, is electron capture and the primary mode after is beta emission. The primary decay product before ¹⁰³Rh is ruthenium and the primary product after is palladium.

List of isotopes

Template:Isotopes table |-id=Rhodium-90 | rowspan=2|⁹⁰Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 45 | rowspan=2|89.94457(22)# | rowspan=2|29(3) ms | β⁺ | ⁹⁰Ru | rowspan=2|(0+) | rowspan=2| |- | β⁺, p? (<0.7%) | ⁸⁹Tc |-id=Rhodium-90m | rowspan=2 style="text-indent:1em" | ^90mRh | rowspan=2 colspan="3" style="text-indent:2em" | 0(500)# keV | rowspan=2|0.56(2) s | β⁺ (90.4%) | ⁹⁰Ru | rowspan=2|(7+) | rowspan=2| |- | β⁺, p (9.6%) | ⁸⁹Tc |-id=Rhodium-91 | rowspan=2|⁹¹Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 46 | rowspan=2|90.93712(32)# | rowspan=2|1.47(22) s | β⁺ (98.7%) | ⁹¹Ru | rowspan=2|(9/2+) | rowspan=2| |- | β⁺, p (1.3%) | ⁹⁰Tc |-id=Rhodium-91m | rowspan=3 style="text-indent:1em" | ^91mRh | rowspan=3 colspan="3" style="text-indent:2em" | 172.9(4) keV | rowspan=3|1.8# s | β⁺? | ⁹¹Ru | rowspan=3|1/2−# | rowspan=3| |- | β⁺, p? | ⁹⁰Tc |- | IT? | ⁹¹Rh |-id=Rhodium-92 | rowspan=2|⁹²Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 47 | rowspan=2|91.9323677(47) | rowspan=2|5.61(8) s | β⁺ (97.95%) | ⁹²Ru | rowspan=2|(6+) | rowspan=2| |- | β⁺, p (2.05%) | ⁹¹Tc |-id=Rhodium-92m1 | rowspan=2 style="text-indent:1em" | ^92m1Rh | rowspan=2 colspan="3" style="text-indent:2em" | 50(100)# keV | rowspan=2|3.18(22) s | β⁺ (98.3%) | ⁹²Ru | rowspan=2|(2+) | rowspan=2| |- | β⁺, p (1.7%) | ⁹¹Tc |-id=Rhodium-92m2 | style="text-indent:1em" | ^92m2Rh | colspan="3" style="text-indent:2em" | 105(100)# keV | 232(15) ns | IT | ⁹²Rh | (4+) | |-id=Rhodium-93 | ⁹³Rh | style="text-align:right" | 45 | style="text-align:right" | 48 | 92.9259128(28) | 13.9(16) s | β⁺ | ⁹³Ru | 9/2+# | |-id=Rhodium-94 | rowspan=2|⁹⁴Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 49 | rowspan=2|93.9217305(36) | rowspan=2|70.6(6) s | β⁺ (98.2%) | ⁹⁴Ru | rowspan=2|(4+) | rowspan=2| |- | β⁺, p (1.8%) | ⁹³Tc |-id=Rhodium-94m1 | style="text-indent:1em" | ^94m1Rh | colspan="3" style="text-indent:2em" | 54.60(20)# keV | 480(30) ns | IT | ⁹⁴Rh | (2+) | |-id=Rhodium-94m2 | style="text-indent:1em" | ^94m2Rh | colspan="3" style="text-indent:2em" | 300(200)# keV | 25.8(2) s | β⁺ | ⁹⁴Ru | (8+) | |-id=Rhodium-95 | ⁹⁵Rh | style="text-align:right" | 45 | style="text-align:right" | 50 | 94.9158979(42) | 5.02(10) min | β⁺ | ⁹⁵Ru | (9/2)+ | |-id=Rhodium-95m | rowspan=2 style="text-indent:1em" | ^95mRh | rowspan=2 colspan="3" style="text-indent:2em" | 543.3(3) keV | rowspan=2|1.96(4) min | IT (88%) | ⁹⁵Rh | rowspan=2|(1/2)− | rowspan=2| |- | β⁺ (12%) | ⁹⁵Ru |-id=Rhodium-96 | ⁹⁶Rh | style="text-align:right" | 45 | style="text-align:right" | 51 | 95.914452(11) | 9.90(10) min | β⁺ | ⁹⁶Ru | 6+ | |-id=Rhodium-96m | rowspan=2 style="text-indent:1em" | ^96mRh | rowspan=2 colspan="3" style="text-indent:2em" | 51.98(9) keV | rowspan=2|1.51(2) min | IT (60%) | ⁹⁶Rh | rowspan=2|3+ | rowspan=2| |- | β⁺ (40%) | ⁹⁶Ru |-id=Rhodium-97 | ⁹⁷Rh | style="text-align:right" | 45 | style="text-align:right" | 52 | 96.911328(38) | 30.7(6) min | β⁺ | ⁹⁷Ru | 9/2+ | |-id=Rhodium-97m | rowspan=2 style="text-indent:1em" | ^97mRh | rowspan=2 colspan="3" style="text-indent:2em" | 258.76(18) keV | rowspan=2|46.2(16) min | β⁺ (94.4%) | ⁹⁷Ru | rowspan=2|1/2− | rowspan=2| |- | IT (5.6%) | ⁹⁷Rh |-id=Rhodium-98 | ⁹⁸Rh | style="text-align:right" | 45 | style="text-align:right" | 53 | 97.910708(13) | 8.72(12) min | β⁺ | ⁹⁸Ru | (2)+ | |-id=Rhodium-98m | rowspan=2 style="text-indent:1em" | ^98mRh | rowspan=2 colspan="3" style="text-indent:2em" | 56.3(10) keV | rowspan=2|3.6(2) min | IT (89%) | ⁹⁸Rh | rowspan=2|(5+) | rowspan=2| |- | β⁺ (11%) | ⁹⁸Ru |-id=Rhodium-99 | ⁹⁹Rh | style="text-align:right" | 45 | style="text-align:right" | 54 | 98.908121(21) | 16.1(2) d | β⁺ | ⁹⁹Ru | 1/2− | |-id=Rhodium-99m | rowspan=2 style="text-indent:1em" | ^99mRh | rowspan=2 colspan="3" style="text-indent:2em" | 64.4(5) keV | rowspan=2|4.7(1) h | β⁺ | ⁹⁹Ru | rowspan=2|9/2+ | rowspan=2| |- | IT? | ⁹⁹Rh |-id=Rhodium-100 | rowspan=2|¹⁰⁰Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 55 | rowspan=2|99.908114(19) | rowspan=2|20.8(1) h | EC (95.1%) | ¹⁰⁰Ru | rowspan=2|1− | rowspan=2| |- | β⁺ (4.9%) | ¹⁰⁰Ru |-id=Rhodium-100m1 | style="text-indent:1em" | ^100m1Rh | colspan="3" style="text-indent:2em" | 74.782(14) keV | 214.0(20) ns | IT | ¹⁰⁰Rh | (2)+ | |-id=Rhodium-100m2 | rowspan=2 style="text-indent:1em" | ^100m2Rh | rowspan=2 colspan="3" style="text-indent:2em" | 107.6(2) keV | rowspan=2|4.6(2) min | IT (98.3%) | ¹⁰⁰Rh | rowspan=2|(5+) | rowspan=2| |- | β⁺ (1.7%) | ¹⁰⁰Ru |-id=Rhodium-100m3 | style="text-indent:1em" | ^100m3Rh | colspan="3" style="text-indent:2em" | 219.61(22) keV | 130(10) ns | IT | ¹⁰⁰Rh | (7+) | |-id=Rhodium-101 | ¹⁰¹Rh | style="text-align:right" | 45 | style="text-align:right" | 56 | 100.9061589(63) | 4.07(5) y | EC | ¹⁰¹Ru | 1/2− | |-id=Rhodium-101m | rowspan=2 style="text-indent:1em" | ^101mRh | rowspan=2 colspan="3" style="text-indent:2em" | 157.32(3) keV | rowspan=2|4.343(10) d | EC (92.80%) | ¹⁰¹Ru | rowspan=2|9/2+ | rowspan=2| |- | IT (7.20%) | ¹⁰¹Rh |-id=Rhodium-102 | rowspan=2|¹⁰²Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 57 | rowspan=2|101.9068343(69) | rowspan=2|207.0(15) d | β⁺ (78%) | ¹⁰²Ru | rowspan=2|2− | rowspan=2| |- | β⁻ (22%) | ¹⁰²Pd |-id=Rhodium-102m | rowspan=2 style="text-indent:1em" | ^102mRh | rowspan=2 colspan="3" style="text-indent:2em" | 140.73(9) keV | rowspan=2|3.742(10) y | β⁺ (99.77%) | ¹⁰²Ru | rowspan=2|6+ | rowspan=2| |- | IT (0.233%) | ¹⁰²Rh |-id=Rhodium-103 | ¹⁰³Rh | style="text-align:right" | 45 | style="text-align:right" | 58 | 102.9054941(25) | colspan=3 align=center|Stable | 1/2− | 1.0000 |-id=Rhodium-103m | style="text-indent:1em" | ^103mRh | colspan="3" style="text-indent:2em" | 39.753(6) keV | 56.114(9) min | IT | ¹⁰³Rh | 7/2+ | |-id=Rhodium-104 | rowspan=2|¹⁰⁴Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 59 | rowspan=2|103.9066453(25) | rowspan=2|42.3(4) s | β⁻ (99.55%) | ¹⁰⁴Pd | rowspan=2|1+ | rowspan=2| |- | β⁺ (0.45%) | ¹⁰⁴Ru |-id=Rhodium-104m | rowspan=2 style="text-indent:1em" | ^104mRh | rowspan=2 colspan="3" style="text-indent:2em" | 128.9679(5) keV | rowspan=2|4.34(3) min | IT (99.87%) | ¹⁰⁴Rh | rowspan=2|5+ | rowspan=2| |- | β⁻ (0.13%) | ¹⁰⁴Pd |-id=Rhodium-105 | ¹⁰⁵Rh | style="text-align:right" | 45 | style="text-align:right" | 60 | 104.9056878(27) | 35.341(19) h | β⁻ | ¹⁰⁵Pd | 7/2+ | |-id=Rhodium-105m | style="text-indent:1em" | ^105mRh | colspan="3" style="text-indent:2em" | 129.742(4) keV | 42.8(3) s | IT | ¹⁰⁵Rh | 1/2− | |-id=Rhodium-106 | ¹⁰⁶Rh | style="text-align:right" | 45 | style="text-align:right" | 61 | 105.9072859(58) | 30.07(35) s | β⁻ | ¹⁰⁶Pd | 1+ | |-id=Rhodium-106m | style="text-indent:1em" | ^106mRh | colspan="3" style="text-indent:2em" | 132(11) keV | 131(2) min | β⁻ | ¹⁰⁶Pd | (6)+ | |-id=Rhodium-107 | ¹⁰⁷Rh | style="text-align:right" | 45 | style="text-align:right" | 62 | 106.906748(13) | 21.7(4) min | β⁻ | ¹⁰⁷Pd | 7/2+ |-id=Rhodium-107m | style="text-indent:1em" | ^107mRh | colspan="3" style="text-indent:2em" | 268.36(4) keV | >10 μs | IT | ¹⁰⁷Rh | 1/2− | |-id=Rhodium-108 | ¹⁰⁸Rh | style="text-align:right" | 45 | style="text-align:right" | 63 | 107.908715(15) | 16.8(5) s | β⁻ | ¹⁰⁸Pd | 1+ | |-id=Rhodium-108m | style="text-indent:1em" | ^108mRh | colspan="3" style="text-indent:2em" | 115(18) keV | 6.0(3) min | β⁻ | ¹⁰⁸Pd | (5+) | |-id=Rhodium-109 | ¹⁰⁹Rh | style="text-align:right" | 45 | style="text-align:right" | 64 | 108.9087496(43) | 80.8(7) s | β⁻ | ¹⁰⁹Pd | 7/2+ | |-id=Rhodium-109m | style="text-indent:1em" | ^109mRh | colspan="3" style="text-indent:2em" | 225.873(19) keV | 1.66(4) μs | IT | ¹⁰⁹Rh | 3/2+ | |-id=Rhodium-110 | ¹¹⁰Rh | style="text-align:right" | 45 | style="text-align:right" | 65 | 109.911080(19) | 3.35(12) s | β⁻ | ¹¹⁰Pd | (1+) | |-id=Rhodium-110m | style="text-indent:1em" | ^110mRh | colspan="3" style="text-indent:2em" | 220(150)# keV | 28.5(13) s | β⁻ | ¹¹⁰Pd | (6+) | |-id=Rhodium-111 | ¹¹¹Rh | style="text-align:right" | 45 | style="text-align:right" | 66 | 110.9116432(74) | 11(1) s | β⁻ | ¹¹¹Pd | (7/2+) | |-id=Rhodium-112 | ¹¹²Rh | style="text-align:right" | 45 | style="text-align:right" | 67 | 111.914405(47) | 3.4(4) s | β⁻ | ¹¹²Pd | (1+) | |-id=Rhodium-112m | style="text-indent:1em" | ^112mRh | colspan="3" style="text-indent:2em" | 340(70) keV | 6.73(15) s | β⁻ | ¹¹²Pd | (6+) | |-id=Rhodium-113 | ¹¹³Rh | style="text-align:right" | 45 | style="text-align:right" | 68 | 112.9154402(77) | 2.80(12) s | β⁻ | ¹¹³Pd | (7/2+) | |-id=Rhodium-114 | ¹¹⁴Rh | style="text-align:right" | 45 | style="text-align:right" | 69 | 113.918722(77) | 1.85(5) s | β⁻ | ¹¹⁴Pd | 1+ | |-id=Rhodium-114m | style="text-indent:1em" | ^114mRh | colspan="3" style="text-indent:2em" | 200(150)# keV | 1.85(5) s | β⁻ | ¹¹⁴Pd | (7−) | |-id=Rhodium-115 | rowspan=2|¹¹⁵Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 70 | rowspan=2|114.9203116(79) | rowspan=2|1.03(3) s | β⁻ | ¹¹⁵Pd | rowspan=2|(7/2+) | rowspan=2| |- | β⁻, n? | ¹¹⁴Pd |-id=Rhodium-116 | rowspan=2|¹¹⁶Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 71 | rowspan=2|115.924062(79) | rowspan=2|685(39) ms | β⁻ (>97.9%) | ¹¹⁶Pd | rowspan=2|1+ | rowspan=2| |- | β⁻, n? (<2.1%) | ¹¹⁵Pd |-id=Rhodium-116m | rowspan=2 style="text-indent:1em" | ^116mRh | rowspan=2 colspan="3" style="text-indent:2em" | 200(150)# keV | rowspan=2|570(50) ms | β⁻ (>97.9%) | ¹¹⁶Pd | rowspan=2|(6−) | rowspan=2| |- | β⁻, n? (<2.1%) | ¹¹⁵Pd |-id=Rhodium-117 | rowspan=2|¹¹⁷Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 72 | rowspan=2|116.9260363(95) | rowspan=2|421(30) ms | β⁻ | ¹¹⁷Pd | rowspan=2|7/2+# | rowspan=2| |- | β⁻, n? (<7.6%) | ¹¹⁶Pd |-id=Rhodium-117m | style="text-indent:1em" | ^117mRh | colspan="3" style="text-indent:2em" | 321.2(10) keV | 138(17) ns | IT | ¹¹⁷Rh | 3/2+# | |-id=Rhodium-118 | rowspan=2|¹¹⁸Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 73 | rowspan=2|117.930341(26) | rowspan=2|282(9) ms | β⁻ (96.9%) | ¹¹⁸Pd | rowspan=2|1+# | rowspan=2| |- | β⁻, n (3.1%) | ¹¹⁷Pd |-id=Rhodium-118m | rowspan=3 style="text-indent:1em" | ^118mRh | rowspan=3 colspan="3" style="text-indent:2em" | 200(150)# keV | rowspan=3|310(30) ms | β⁻ (96.9%) | ¹¹⁸Pd | rowspan=3|6−# | rowspan=3| |- | β⁻, n (3.1%) | ¹¹⁷Pd |- | IT? | ¹¹⁸Rh |-id=Rhodium-119 | rowspan=2|¹¹⁹Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 74 | rowspan=2|118.932557(10) | rowspan=2|190(6) ms | β⁻ (93.6%) | ¹¹⁹Pd | rowspan=2|7/2+# | rowspan=2| |- | β⁻, n (6.4%) | ¹¹⁸Pd |-id=Rhodium-120 | rowspan=3| ¹²⁰Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 75 | rowspan=3| 119.93707(22)# | rowspan=3| 129.6(42) ms | β⁻ | ¹²⁰Pd | rowspan=3| 8−# | rowspan=3| |- | β⁻, n (<9.3%) | ¹¹⁹Pd |- | β⁻, 2n? | ¹¹⁸Pd |-id=Rhodium-120m | style="text-indent:1em" | ^120mRh | colspan="3" style="text-indent:2em" | 157.2(7) keV | 295(16) ns | IT | ¹²⁰Rh | 6# | |-id=Rhodium-121 | rowspan=2| ¹²¹Rh | rowspan=2 style="text-align:right" | 45 | rowspan=2 style="text-align:right" | 76 | rowspan=2| 120.93961(67) | rowspan=2| 74(4) ms | β⁻ | ¹²¹Pd | rowspan=2| 7/2+# | rowspan=2| |- | β⁻, n (>11%) | ¹²⁰Pd |-id=Rhodium-122 | rowspan=3| ¹²²Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 77 | rowspan=3| 121.94431(32)# | rowspan=3| 51(6) ms | β⁻ | ¹²²Pd | rowspan=3| 7−# | rowspan=3| |- | β⁻, n (<3.9%) | ¹²¹Pd |- | β⁻, 2n? | ¹²⁰Pd |-id=Rhodium-122m | style="text-indent:1em" | ^122mRh | colspan="3" style="text-indent:2em" | 271.0(7) keV | 830(120) ns | IT | ¹²²Rh | 4+# | |-id=Rhodium-123 | rowspan=3| ¹²³Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 78 | rowspan=3| 122.94719(43)# | rowspan=3| 42(4) ms | β⁻ | ¹²³Pd | rowspan=3| 7/2+# | rowspan=3| |- | β⁻, n (>24%) | ¹²²Pd |- | β⁻, 2n? | ¹²¹Pd |-id=Rhodium-124 | rowspan=3| ¹²⁴Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 79 | rowspan=3| 123.95200(43)# | rowspan=3| 30(2) ms | β⁻ | ¹²⁴Pd | rowspan=3| 2+# | rowspan=3| |- | β⁻, n (<31%) | ¹²³Pd |- | β⁻, 2n? | ¹²²Pd |-id=Rhodium-125 | rowspan=3|¹²⁵Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 80 | rowspan=3|124.95509(54)# | rowspan=3|26.5(20) ms | β⁻ | ¹²⁵Pd | rowspan=3|7/2+# | rowspan=3| |- | β⁻, n? | ¹²⁴Pd |- | β⁻, 2n? | ¹²³Pd |-id=Rhodium-126 | rowspan=3|¹²⁶Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 81 | rowspan=3|125.96006(54)# | rowspan=3|19(3) ms | β⁻ | ¹²⁶Pd | rowspan=3|1−# | rowspan=3| |- | β⁻, n? | ¹²⁵Pd |- | β⁻, 2n? | ¹²⁴Pd |-id=Rhodium-127 | rowspan=3|¹²⁷Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 82 | rowspan=3|126.96379(64)# | rowspan=3|28(14) ms | β⁻ | ¹²⁷Pd | rowspan=3|7/2+# | rowspan=3| |- | β⁻, n? | ¹²⁶Pd |- | β⁻, 2n? | ¹²⁵Pd |-id=Rhodium-128 | rowspan=3|¹²⁸Rh | rowspan=3 style="text-align:right" | 45 | rowspan=3 style="text-align:right" | 83 | rowspan=3|127.97065(32)# | rowspan=3|8# ms
[>550 ns] | β⁻? | ¹²⁸Pd | rowspan=3| | rowspan=3| |- | β⁻, n? | ¹²⁷Pd |- | β⁻, 2n? | ¹²⁶Pd Template:Isotopes table/footer

See also

Daughter products other than rhodium

• Isotopes of palladium
• Isotopes of ruthenium
• Isotopes of technetium

References

• Isotope masses from:
  • Template:NUBASE 2003
• Half-life, spin, and isomer data selected from the following sources.
  • Template:NUBASE 2003
  • Template:NNDC
  • Template:CRC85