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Isotopes of rhodium#Rodium-103

{{Short description|none}}

{{Infobox rhodium isotopes}}

Naturally occurring rhodium (45Rh) is composed of only one stable isotope, 103Rh.{{cite journal |author=John W. Arblaster |title=The Discoverers of the Rhodium Isotopes. The thirty-eight known rhodium isotopes found between 1934 and 2010 |journal=Platinum Metals Review |volume=55 |issue=2 |date=April 2011 |pages=124–134 |doi=10.1595/147106711X555656|doi-access=free }} 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

{{Anchor|Rhodium-88|Rhodium-89}}

{{Isotopes table

| symbol = Rh

| refs = NUBASE2020, AME2020 II

| notes = m, unc(), exex#, mass#, exen#, hl#, spin(), spin#, daughter-st, n, p, IT, EC

}}

|-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" | 90mRhOrder of ground state and isomer is uncertain.

| 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

| 103RhFission product

| 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

{{Isotopes table/footer}}

References

{{Reflist}}

  • Isotope masses from:
  • {{NUBASE 2003}}
  • Half-life, spin, and isomer data selected from the following sources.
  • {{NUBASE 2003}}
  • {{NNDC}}
  • {{CRC85|chapter=11}}

{{Navbox element isotopes}}

Category:Rhodium

Rhodium