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Isotopes of praseodymium#Praseodymium-150

{{Short description|none}}

{{Infobox praseodymium isotopes}}

Naturally occurring praseodymium (59Pr) is composed of one stable isotope, 141Pr. Thirty-eight radioisotopes have been characterized with the most stable being 143Pr, with a half-life of 13.57 days and 142Pr, with a half-life of 19.12 hours. All of the remaining radioactive isotopes have half-lives that are less than six hours and the majority of these have half-lives that are less than 33 seconds. This element also has 15 meta states with the most stable being 138mPr (t1/2 2.12 hours), 142mPr (t1/2 14.6 minutes) and 134mPr (t1/2 11 minutes).

The isotopes of praseodymium range in atomic weight from 120.955 u (121Pr) to 158.955 u (159Pr). The primary decay mode before the stable isotope, 141Pr, is electron capture and the mode after is beta decay. The primary decay products before 141Pr are element 58 (cerium) isotopes and the primary products after are element 60 (neodymium) isotopes.

List of isotopes

{{Anchor|Praseodymium-122|Praseodymium-123}}

{{Isotopes table

|symbol=Pr

|refs=NUBASE2020, AME2020 II

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

}}

|-id=Praseodymium-121

| 121Pr

| style="text-align:right" | 59

| style="text-align:right" | 62

| 120.95539(54)#

| 12(5) ms

| p

| 120Ce

| (3/2)(+#)

|

|-id=Praseodymium-124

| rowspan=2|124Pr

| rowspan=2 style="text-align:right" | 59

| rowspan=2 style="text-align:right" | 65

| rowspan=2|123.94294(43)#

| rowspan=2|1.2(2) s

| β+

| 124Ce

| rowspan=2|

| rowspan=2|

|-

| β+, p (?%)

| 123La

|-id=Praseodymium-125

| 125Pr

| style="text-align:right" | 59

| style="text-align:right" | 66

| 124.93766(32)#

| 3.3(7) s

| β+

| 125Ce

| 3/2+#

|

|-id=Praseodymium-126

| rowspan=2|126Pr

| rowspan=2 style="text-align:right" | 59

| rowspan=2 style="text-align:right" | 67

| rowspan=2|125.93524(21)#

| rowspan=2|3.12(18) s

| β+

| 126Ce

| rowspan=2|(4, 5)

| rowspan=2|

|-

| β+, p (?%)

| 125La

|-id=Praseodymium-127

| 127Pr

| style="text-align:right" | 59

| style="text-align:right" | 68

| 126.93071(21)#

| 4.2(3) s

| β+

| 127Ce

| 3/2+#

|

|-id=Praseodymium-127m

| style="text-indent:1em" | 127mPr

| colspan="3" style="text-indent:2em" | 600(200)# keV

| 2# μs

|

|

| (11/2−)

|

|-id=Praseodymium-128

| rowspan=2|128Pr

| rowspan=2 style="text-align:right" | 59

| rowspan=2 style="text-align:right" | 69

| rowspan=2|127.928791(32)

| rowspan=2|2.85(9) s

| β+

| 128Ce

| rowspan=2|(3+)

| rowspan=2|

|-

| β+, p (?%)

| 127La

|-id=Praseodymium-129

| 129Pr

| style="text-align:right" | 59

| style="text-align:right" | 70

| 128.925095(32)

| 30(4) s

| β+

| 129Ce

| (3/2+)

|

|-id=Praseodymium-129m

| style="text-indent:1em" | 129mPr

| colspan="3" style="text-indent:2em" | 382.57(24) keV

| 26(11)# μs

| IT

| 129Pr

| (11/2−)

|

|-id=Praseodymium-130

| 130Pr

| style="text-align:right" | 59

| style="text-align:right" | 71

| 129.923590(69)

| 40.0(4) s

| β+

| 130Ce

| (6, 7)(+#)

|

|-id=Praseodymium-130m

| style="text-indent:1em" | 130mPr

| colspan="3" style="text-indent:2em" | 100(100)# keV

| 10# s

|

|

| 2+#

|

|-id=Praseodymium-131

| 131Pr

| style="text-align:right" | 59

| style="text-align:right" | 72

| 130.920235(50)

| 1.50(3) min

| β+

| 131Ce

| (3/2+)

|

|-id=Praseodymium-131m

| rowspan=2 style="text-indent:1em" | 131mPr

| rowspan=2 colspan="3" style="text-indent:2em" | 152.4(3) keV

| rowspan=2|5.73(20) s

| IT (96.4%)

| 131Pr

| rowspan=2|(11/2−)

| rowspan=2|

|-

| β+ (3.6%)

| 131Ce

|-id=Praseodymium-132

| 132Pr

| style="text-align:right" | 59

| style="text-align:right" | 73

| 131.919240(31)

| 1.49(11) min

| β+

| 132Ce

| (2+)

|

|-id=Praseodymium-132m1

| style="text-indent:1em" | 132m1PrOrder of ground state and isomer is uncertain.

| colspan="3" style="text-indent:2em" | 30(30)# keV

| 1# s

|

|

| (5+)

|

|-id=Praseodymium-132m2

| style="text-indent:1em" | 132m2Pr

| colspan="3" style="text-indent:2em" | 250(30)# keV

| 2.46(4) μs

| IT

| 132Pr

| (8+)

|

|-id=Praseodymium-132m3

| style="text-indent:1em" | 132m3Pr

| colspan="3" style="text-indent:2em" | 300(30)# keV

| 486(70) ns

| IT

| 132Pr

| (8−)

|

|-id=Praseodymium-133

| 133Pr

| style="text-align:right" | 59

| style="text-align:right" | 74

| 132.916331(13)

| 6.5(3) min

| β+

| 133Ce

| 5/2+

|

|-id=Praseodymium-133m

| style="text-indent:1em" | 133mPr

| colspan="3" style="text-indent:2em" | 192.12(14) keV

| 1.1(2) μs

| IT

| 133Pr

| (11/2−)

|

|-id=Praseodymium-134

| 134Pr

| style="text-align:right" | 59

| style="text-align:right" | 75

| 133.915697(22)

| 17(2) min

| β+

| 134Ce

| 2−

|

|-id=Praseodymium-134m

| style="text-indent:1em" | 134mPr

| colspan="3" style="text-indent:2em" | 67.7(4) keV

| ~11 min

| β+

| 134Ce

| 6−

|

|-id=Praseodymium-135

| 135Pr

| style="text-align:right" | 59

| style="text-align:right" | 76

| 134.913112(13)

| 24(1) min

| β+

| 135Ce

| 3/2+

|

|-id=Praseodymium-135m

| style="text-indent:1em" | 135mPr

| colspan="3" style="text-indent:2em" | 358.06(6) keV

| 105(10) μs

| IT

| 135Pr

| (11/2−)

|

|-id=Praseodymium-136

| 136Pr

| style="text-align:right" | 59

| style="text-align:right" | 77

| 135.912677(12)

| 13.1(1) min

| β+

| 136Ce

| 2+

|

|-id=Praseodymium-137

| 137Pr

| style="text-align:right" | 59

| style="text-align:right" | 78

| 136.9106792(87)

| 1.28(3) h

| β+

| 137Ce

| 5/2+

|

|-id=Praseodymium-137m

| style="text-indent:1em" | 137mPr

| colspan="3" style="text-indent:2em" | 561.22(23) keV

| 2.66(7) μs

| IT

| 137Pr

| 11/2−

|

|-id=Praseodymium-138

| 138Pr

| style="text-align:right" | 59

| style="text-align:right" | 79

| 137.910757(11)

| 1.45(5) min

| β+

| 138Ce

| 1+

|

|-id=Praseodymium-138m

| style="text-indent:1em" | 138mPr

| colspan="3" style="text-indent:2em" | 350(19) keV

| 2.12(4) h

| β+

| 138Ce

| 7−

|

|-id=Praseodymium-139

| 139Pr

| style="text-align:right" | 59

| style="text-align:right" | 80

| 138.9089327(39)

| 4.41(4) h

| β+

| 139Ce

| 5/2+

|

|-id=Praseodymium-140

| rowspan=2|140Pr

| rowspan=2 style="text-align:right" | 59

| rowspan=2 style="text-align:right" | 81

| rowspan=2|139.9090856(66)

| rowspan=2|3.39(1) min

| EC (51.3%)

| rowspan=2|140Ce

| rowspan=2|1+

| rowspan=2|

|-

| β+ (48.7%)

|-id=Praseodymium-140m1

| style="text-indent:1em" | 140m1Pr

| colspan="3" style="text-indent:2em" | 127.8(3) keV

| 0.35(2) μs

| IT

| 140Pr

| 5+

|

|-id=Praseodymium-140m2

| style="text-indent:1em" | 140m2Pr

| colspan="3" style="text-indent:2em" | 763.7(5) keV

| 3.05(20) μs

| IT

| 140Pr

| (7)−

|

|-id=Praseodymium-141

| 141PrFission product

| style="text-align:right" | 59

| style="text-align:right" | 82

| 140.9076596(16)

| colspan=3 align=center|Stable

| 5/2+

| 1.0000

|-id=Praseodymium-142

| rowspan=2|142Pr

| rowspan=2 style="text-align:right" | 59

| rowspan=2 style="text-align:right" | 83

| rowspan=2|141.9100516(16)

| rowspan=2|19.12(4) h

| β− (99.98%)

| 142Nd

| rowspan=2|2−

| rowspan=2|

|-

| EC (0.0164%)

| 142Ce

|-id=Praseodymium-142m

| style="text-indent:1em" | 142mPr

| colspan="3" style="text-indent:2em" | 3.694(3) keV

| 14.6(5) min

| IT

| 142Pr

| 5−

|

|-id=Praseodymium-143

| 143Pr

| style="text-align:right" | 59

| style="text-align:right" | 84

| 142.9108226(19)

| 13.57(2) d

| β−

| 143Nd

| 7/2+

|

|-id=Praseodymium-144

| 144Pr

| style="text-align:right" | 59

| style="text-align:right" | 85

| 143.9133107(29)

| 17.28(5) min

| β−

| 144Nd

| 0−

|

|-id=Praseodymium-144m

| rowspan=2 style="text-indent:1em" | 144mPr

| rowspan=2 colspan="3" style="text-indent:2em" | 59.03(3) keV

| rowspan=2|7.2(3) min

| IT (~99.93%)

| 144Pr

| rowspan=2|3−

| rowspan=2|

|-

| β− (~0.07%)

| 144Nd

|-id=Praseodymium-145

| 145Pr

| style="text-align:right" | 59

| style="text-align:right" | 86

| 144.9145180(77)

| 5.984(10) h

| β−

| 145Nd

| 7/2+

|

|-id=Praseodymium-146

| 146Pr

| style="text-align:right" | 59

| style="text-align:right" | 87

| 145.917688(37)

| 24.09(10) min

| β−

| 146Nd

| (2−)

|

|-id=Praseodymium-147

| 147Pr

| style="text-align:right" | 59

| style="text-align:right" | 88

| 146.919007(17)

| 13.39(4) min

| β−

| 147Nd

| 3/2+

|

|-id=Praseodymium-148

| 148Pr

| style="text-align:right" | 59

| style="text-align:right" | 89

| 147.922130(16)

| 2.29(2) min

| β−

| 148Nd

| 1−

|

|-id=Praseodymium-148m

| rowspan=2 style="text-indent:1em" | 148mPr

| rowspan=2 colspan="3" style="text-indent:2em" | 76.80(20) keV

| rowspan=2|2.01(7) min

| β− (64%)

| 148Nd

| rowspan=2|(4)

| rowspan=2|

|-

| IT (36%)

| 148Pr

|-id=Praseodymium-149

| 149Pr

| style="text-align:right" | 59

| style="text-align:right" | 90

| 148.923736(11)

| 2.26(7) min

| β−

| 149Nd

| (5/2+)

|

|-id=Praseodymium-150

| 150Pr

| style="text-align:right" | 59

| style="text-align:right" | 91

| 149.9266764(97)

| 6.19(16) s

| β−

| 150Nd

| 1−

|

|-id=Praseodymium-151

| 151Pr

| style="text-align:right" | 59

| style="text-align:right" | 92

| 150.928309(13)

| 18.90(7) s

| β−

| 151Nd

| (3/2−)

|

|-id=Praseodymium-151m

| style="text-indent:1em" | 151mPr

| colspan="3" style="text-indent:2em" | 35.10(10) keV

| 50(8) μs

| IT

| 151Pr

| (7/2+)

|

|-id=Praseodymium-152

| 152Pr

| style="text-align:right" | 59

| style="text-align:right" | 93

| 151.931553(20)

| 3.57(11) s

| β−

| 152Nd

| 4+

|

|-id=Praseodymium-152m

| style="text-indent:1em" | 152mPr

| colspan="3" style="text-indent:2em" | 115.1(3) keV

| 4.16(10) μs

| IT

| 152Pr

| (1+)

|

|-id=Praseodymium-153

| 153Pr

| style="text-align:right" | 59

| style="text-align:right" | 94

| 152.933904(13)

| 4.28(11) s

| β−

| 153Nd

| 3/2−#

|

|-id=Praseodymium-154

| 154Pr

| style="text-align:right" | 59

| style="text-align:right" | 95

| 153.93789(11)

| 2.30(9) s

| β−

| 154Nd

| (3+)

|

|-id=Praseodymium-155

| 155Pr

| style="text-align:right" | 59

| style="text-align:right" | 96

| 154.940509(18)

| 1.47(3) s

| β−

| 155Nd

| 3/2−#

|

|-id=Praseodymium-156

| 156Pr

| style="text-align:right" | 59

| style="text-align:right" | 97

| 155.9447669(11)

| 444(6) ms

| β−

| 156Nd

| 1+#

|

|-id=Praseodymium-157

| 157Pr

| style="text-align:right" | 59

| style="text-align:right" | 98

| 156.9480031(34)

| 307(21) ms

| β−

| 157Nd

| 3/2−#

|

|-id=Praseodymium-158

| 158Pr

| style="text-align:right" | 59

| style="text-align:right" | 99

| 157.95260(32)#

| 181(14) ms

| β−

| 158Nd

| 5−#

|

|-id=Praseodymium-159

| 159Pr

| style="text-align:right" | 59

| style="text-align:right" | 100

| 158.95623(43)#

| 134(43) ms

| β−

| 159Nd

| 3/2−#

|

|-id=Praseodymium-160

| 160Pr

| style="text-align:right" | 59

| style="text-align:right" | 101

| 159.96114(43)#

| 170(140) ms

| β−

| 160Nd

| 1+#

|

|-id=Praseodymium-161

| 161Pr

| style="text-align:right" | 59

| style="text-align:right" | 102

| 160.96512(54)#

| 90# ms
[>550 ns]

|

|

| 3/2−#

|

{{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:Praseodymium

Praseodymium