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Isotopes of Praseodymium

List, data and properties of all known isotopes of Praseodymium as well as radioactive decay products and intermediate products.

 

Praseodymium isotopes

All atomic nuclei of the chemical element praseodymium are summarized under praseodymium isotopes; these all consist of an atomic nucleus with 59 protons and, in the uncharged state, 59 electrons. The difference between each praseodymium isotope is based on the number of neutrons in the nucleus.

 

Naturally Occurring Praseodymium Isotopes

Praseodymium, which belongs to the rare earths or rare earth metals, only exists in nature as the stable isotope praseodymium-141, atomic mass 140.90766(2) u.

 

All other praseodymium nuclides decay radioactively with short half-lives and have no technical significance.

 

Isotope Table: Praseodymium

 

Atomic Properties

Isotope
Nuclide
ZANNameAtomic Mass
[Nuclear Mass]
{Mass Excess}
Spin I
(h/2π)
μParent
123456789
121Pr5912162Praseodymium-121120.95553(54) u
[120.9231662 u]
{-41.42354 MeV}
(3/2)
122Pr5912263Praseodymium-122121.95181(54) u
[121.9194462 u]
{-44.8887 MeV}
123Pr5912364Praseodymium-123122.94596(64) u
[122.9135962 u]
{-50.33794 MeV}
3/2+
124Pr5912465Praseodymium-124123.94294(43) u
[123.9105762 u]
{-53.15105 MeV}
124Nd
125Pr5912566Praseodymium-125124.93780(32) u
[124.9054362 u]
{-57.93893 MeV}
125Nd
126Pr5912667Praseodymium-126125.93524(21) u
[125.9028762 u]
{-60.32355 MeV}
126Nd
127Pr5912768Praseodymium-127126.93071(21) u
[126.8983462 u]
{-64.54322 MeV}
127Nd
127mPr5912768Praseodymium-127m126.93071(21) u
[126.8983462 u]
{-64.54322 MeV}
11/2-
128Pr5912869Praseodymium-128127.92879(3) u
[127.8964262 u]
{-66.33169 MeV}
4,5,6128Nd
129Pr5912970Praseodymium-129128.92509(3) u
[128.8927262 u]
{-69.77822 MeV}
(3/2+)129Nd
129mPr5912970Praseodymium-129m128.92509(3) u
[128.8927262 u]
{-69.77822 MeV}
(11/2-)
130Pr5913071Praseodymium-130129.92359(7) u
[129.8912262 u]
{-71.17546 MeV}
(5+)130Nd
130mPr5913071Praseodymium-130m129.92359(7) u
[129.8912262 u]
{-71.17546 MeV}
2+
131Pr5913172Praseodymium-131130.92023(5) u
[130.8878662 u]
{-74.30528 MeV}
(3/2+)131Nd
131Pr5913173Praseodymium-131130.92023(5) u
[130.8878662 u]
{-74.30528 MeV}
(11/2-)132Nd
132Pr5913273Praseodymium-132131.91924(3) u
[131.8868762 u]
{-75.22746 MeV}
(2)+
132mPr5913273Praseodymium-132m131.91924(3) u
[131.8868762 u]
{-75.22746 MeV}
(5+)
133Pr5913374Praseodymium-133132.916331(13) u
[132.8839672 u]
{-77.93717 MeV}
(3/2+)133Nd
133mPr5913374Praseodymium-133m132.916331(13) u
[132.8839672 u]
{-77.93717 MeV}
(11/2-)
134Pr5913475Praseodymium-134133.915697(22) u
[133.8833332 u]
{-78.52774 MeV}
2-134Nd
134mPr5913475Praseodymium-134m133.915697(22) u
[133.8833332 u]
{-78.52774 MeV}
(6-)
135Pr5913576Praseodymium-135134.913112(13) u
[134.8807482 u]
{-80.93565 MeV}
3/2(+)135Nd
135mPr5913576Praseodymium-135m134.913112(13) u
[134.8807482 u]
{-80.93565 MeV}
(11/2-)
136Pr5913677Praseodymium-136135.912678(12) u
[135.8803142 u]
{-81.33992 MeV}
2+136Nd
137Pr5913778Praseodymium-137136.910679(9) u
[136.8783152 u]
{-83.20198 MeV}
5/2+137Nd
137mPr5913778Praseodymium-137m136.910679(9) u
[136.8783152 u]
{-83.20198 MeV}
11/2-
138Pr5913879Praseodymium-138137.910752(12) u
[137.8783882 u]
{-83.13398 MeV}
1+138Nd
138mPr5913879Praseodymium-138m137.910752(12) u
[137.8783882 u]
{-83.13398 MeV}
7-
139Pr5913980Praseodymium-139138.908943(8) u
[138.8765792 u]
{-84.81905 MeV}
5/2+139Nd
140Pr5914081Praseodymium-140139.909084(7) u
[139.8767202 u]
{-84.68771 MeV}
1+140Nd
140m1Pr5914081Praseodymium-140m1139.909084(7) u
[139.8767202 u]
{-84.68771 MeV}
5+
140m2Pr5914081Praseodymium-140m2139.909084(7) u
[139.8767202 u]
{-84.68771 MeV}
(7)-
141Pr5914182Praseodymium-141140.90766(2) u
[140.8752962 u]
{-86.01416 MeV}
5/2++ 4.275141Nd
141Ce
145Pm
142Pr5914283Praseodymium-142141.9100504(18) u
[141.8776866 u]
{-83.78751 MeV}
2-+ 0.234(1)
142mPr5914283Praseodymium-142m141.9100504(18) u
[141.8776866 u]
{-83.78751 MeV}
5-2.2(1)
143Pr5914384Praseodymium-143142.9108226(20) u
[142.8784588 u]
{-83.06821 MeV}
7/2++ 2.701(4)143Ce
144Pr5914485Praseodymium-144143.913311(3) u
[143.8809472 u]
{-80.75028 MeV}
0-144Ce
144mPr5914485Praseodymium-144m143.913311(3) u
[143.8809472 u]
{-80.75028 MeV}
3-
145Pr5914586Praseodymium-145144.914518(8) u
[144.8821542 u]
{-79.62597 MeV}
7/2+145Ce
146Pr5914687Praseodymium-146145.91768(4) u
[145.8853162 u]
{-76.68059 MeV}
(2)-146Ce
147Pr5914788Praseodymium-147146.919007(17) u
[146.8866432 u]
{-75.44449 MeV}
(5/2+)147Ce
148Pr5914889Praseodymium-148147.922130(16) u
[147.8897662 u]
{-72.53544 MeV}
1-148Ce
148mPr5914889Praseodymium-148m147.922130(16) u
[147.8897662 u]
{-72.53544 MeV}
(4-)
149Pr5914990Praseodymium-149148.923736(11) u
[148.8913722 u]
{-71.03946 MeV}
(5/2+)149Ce
150Pr5915091Praseodymium-150149.926676(10) u
[149.8943122 u]
{-68.30087 MeV}
(1-)150Ce
151Pr5915192Praseodymium-151150.928309(13) u
[150.8959452 u]
{-66.77974 MeV}
(3/2-)151Ce
152Pr5915293Praseodymium-152151.931553(20) u
[151.8991892 u]
{-63.75797 MeV}
(4+)152Ce
153Pr5915394Praseodymium-153152.933904(13) u
[152.9015402 u]
{-61.56803 MeV}
153Ce
154Pr5915495Praseodymium-154153.93762(12) u
[153.9052562 u]
{-58.1066 MeV}
(3+)154Ce
155Pr5915596Praseodymium-155154.940509(18) u
[154.9081452 u]
{-55.41551 MeV}
(3/2-)155Ce
156Pr5915697Praseodymium-156155.94464(21) u
[155.9122762 u]
{-51.56751 MeV}
(1+)156Ce
157Pr5915798Praseodymium-157156.94789(32) u
[156.9155262 u]
{-48.54015 MeV}
(3/2-)
158Pr5915899Praseodymium-158157.95241(32) u
[157.9200462 u]
{-44.3298 MeV}
(5-)
159Pr59159100Praseodymium-159158.95589(43) u
[158.9235262 u]
{-41.0882 MeV}
(3/2-)
160Pr59160101Praseodymium-160159.96079(43) u
[159.9284262 u]
{-36.52388 MeV}
(1+)

 

Radioactive Decay Properties

IsotopeRadioactive DecayAEExtern
Half-lifeDecay ModeProbabilityEnergy
1101112131415
Pr-12110 ms (+6-3)p → 120CeAL
Pr-122500~ msβ+122CeAL
Pr-123800~ msβ+123CeAL
Pr-1241.2(2) sEC/β+124Ce
EC, p → 123La
< 100 %
<< 1 %
11.76(50) MeV
AL
Pr-1253.3(7) sEC/β+125Ce
β+, p → 124La
< 100 %
?
8.72(36) MeV
AL
Pr-1263.14(22) sEC/β+126Ce
EC, p → 125La
< 100 %
?
10.50(20) MeV
AL
Pr-1274.2(3) sEC/β+127Ce100 %7.44(20) MeVAL
Pr-127m50 msAL
Pr-1282.84(9) sEC/β+128Ce100 %9.20(4) MeVAL
Pr-12930(4) sEC/β+129Ce100 %6.51(4) MeVAL
Pr-129m1~ msβ+129Ce382.7(5) keVAL
Pr-13040.0(4) sEC/β+130Ce100 %8.25(7) MeVAL
Pr-130m10 sAL
Pr-1311.51(2) minEC/β+131Ce100 %5.41(6) MeVAL
Pr-131m5.73(20) sIso → 131Pr
EC/β+131Ce
96.4(12) %
3.6(12) %

152.4(3) keVAL
Pr-1321.6(3) minEC/β+132Ce100 %7.24(4) MeVAL
Pr-132m20 sβ+132CeAL
Pr-1336.5(3) minEC/β+133Ce100 %4.481(21) MeVAL
Pr-133m1.1(2) sIso → 133Pr100 %0.192 MeV192.12(14) keVAL
Pr-13417(2) minEC/β+134Ce100 %6.305(29) MeVAL
Pr-134m11 minEC/β+134Ce100 %+y keVAL
Pr-13524(1) minEC/β+135Ce100 %3.680(16) MeVAL
Pr-135m105(10) µsIso → 135Pr100 %358.06(6) keVAL
Pr-13613.1(1) minEC/β+136Ce100 %5.168(11) MeVAL
Pr-1371.28(3) hEC/β+137Ce100 %2.717(8) MeVAL
Pr-137m2.66(7) μs561.22(23) keVAL
Pr-1381.45(5) minEC/β+138Ce100 %4.437(12) MeVAL
Pr-138m2.03(2) hEC/β+138Ce100 %364(23) keVAL
Pr-1394.41(4) hEC/β+139Ce100 %2.129(11) MeVAL
Pr-1403.39(1) minEC/β+140Ce100 %3.388(6) MeVAL
Pr-140m10.35(2) μsIso → 140Pr100 %127.8(3) keVAL
Pr-140m23.05(20) µsIso → 140Pr100 %763.7(5) keVAL
Pr-141stableAL
Pr-14219.12(4) hβ-142Nd
EC → 142Ce
99.9836(8) %
0.0164(8) %
2.1625(14) MeV
0.746(3) MeV
AL
Pr-142m14.6(5) minIso → 142Pr100 %0.004 MeV3.694(3) keVAL
Pr-14313.57(2) dβ-143Nd100 %0.9340(14) MeVAL
Pr-14417.28(5) minβ-144Nd100 %2.9974(24) MeVAL
Pr-144m7.2(3) minIso → 144Pr
β-144Nd
99.93 %
0.07 %
0.059 MeV
59.03(3) keVAL
Pr-1455.984(10) hβ-145Nd100 %1.806(7) MeVAL
Pr-14624.09(10) minβ-146Nd100 %4.24(3) MeVAL
Pr-14713.4(3) minβ-147Nd100 %2.703(16) MeVAL
Pr-1482.29(2) minβ-148Nd100 %4.873(15) MeVAL
Pr-148m2.01(7) minβ-148Nd
Iso → 148Pr
64(10) %
36(10) %

76.8(2) keVAL
Pr-1492.26(7) minβ-149Nd100 %3.336(10) MeVAL
Pr-1506.19(16) sβ-150Nd100 %5.379(9) MeVAL
Pr-15118.90(7) sβ-151Nd100 %4.163(12) MeVAL
Pr-1523.57(18) sβ-152Nd100 %6.93(3) MeVAL
Pr-1534.28(11) sβ-153Nd100 %5.762(12) MeVAL
Pr-1542.3(1) sβ-154Nd100 %7.72(10) MeVAL
Pr-1551.47(3) sβ-155Nd
β-, n → 154Nd
100 %
?
6.868(19) MeV
2.34(6) MeV
AL
Pr-1560.444(6) sβ-156Nd
β-, n → 155Nd
100 %
?
8.91(28) MeV
2.64(20) MeV
AL
Pr-157295 msβ-157Nd
β-, n → 156Nd
100 %
?
7.92(30) MeV
3.86(36) MeV
AL
Pr-158181(14) msβ-158Nd
β-, n → 157Nd
100 %
?
9.72(36) MeV
4.06(30) MeV
AL
Pr-1590.13(4) sβ-159Nd
β-, n → 158Nd
100 %
?
8.72(50) MeV
4.89(45) MeV
AL
Pr-1600.17(14) sβ-160Nd
β-, n → 159Nd
100 %
?
10.61(50) MeV
5.22(50) MeV

 

Notes (related to the columns):

1 - nuclide, isotope symbol.
2 - Z = number of protons (atomic number).
3 - Mass number A.
4 - N = number of neutrons.
5 - Identification of the Praseodymium isotope.
6 - Relative atomic mass of the Praseodymium isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to 12C = 12.00000 [2]. In addition, the mass excess is given in MeV.
7 - Nuclear spin I, unit: h/2π.
8 - Nuclear magnetic moment μmag.
9 - Source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.
10 - Decay: Half-live of the Praseodymium isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).
11 - Decay: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β- = beta minus decay with electron emission; EC = electron capture; β+ = positron emission; ε = β+ and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.
12 - Decay percentage in percent (%).
13 - Decay energy; Particle energy related to decay type.
14 - AE = Excitation energy for metastable nuclei.
15 - Other information and notes: AL = Adopted Levels (link to external data [1]).

Miscellaneous:

()- Numbers in brackets: uncertainty to represent the spread of the reported value.
~ - Theoretical values or systematic trends.
  - unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.

 

NMR active Praseodymium nuclides

Nuclide
quantity 1)
spin
Nuclear magnetic
moment
μ/μN
Gyromagnetic
ratio
107 rad T-1 s-1
Quadrupole
moment
Q fm-2
Resonant
frequency
v0 bei 1 T
Relative
sensitivity
H0 = const.
v0 = const. 2)
141Pr
100 %
5/2+
+ 4,2757,765- 5,89(42)13,03590,33483
3,5720

1) Quantity Percentage of natural occurrence.

2) Related to 1H = 1,000.

 

Radiation Protection

According to the Radiation Protection Ordinance (StrlSchV 2018, Germany), the following values (columns 1 to 7) apply to the handling of Praseodymium radionuclides:

NuclideLimit ValueHASS limitSCDaughter NuclidesHalf-life
Pr-136105 Bq10 Bq/g13.1 min
Pr-137106 Bq100 Bq/g76.8 min
Pr-138m106 Bq10 Bq/g2.1 h
Pr-139+107 Bq100 Bq/g4.4 h
Pr-142105 Bq100 Bq/g1 TBq10 Bq cm-219.1 h
Pr-142m109 Bq107 Bq/g14.6 min
Pr-143106 Bq1000 Bq/g30 TBq100 Bq cm-213.6 d
Pr-144105 Bq100 Bq/g17.3 min
Pr-145105 Bq1000 Bq/g6.0 h
Pr-147105 Bq10 Bq/g13.4 min

(HASS = High-Activity Sealed Radioactive Sources; SC = surface contamination)

 

Literature Sources and References

Properties of the Praseodymium nucleides

[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.

[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.

[3] - Live Chart of Nuclides. Nuclear structure and decay data.

Praseodymium: NMR properties - 141Pr-NMR

[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.

[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.

[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.

[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).

More sources:

[8] - Isotopic abundances, atomic weights and isotopic masses: see respective keyword.

 


Category: Isotopes

Last update: 05.07.2020



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