Isotopes of praseodymium
Naturally occurring praseodymium (Pr) 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 5.985 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.
Relative atomic mass: 140.90766(2).[1]
Table
nuclide symbol |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s)[2][n 1] |
daughter isotope(s)[n 2] |
nuclear spin |
representative isotopic composition (mole fraction) |
range of natural variation (mole fraction) |
---|---|---|---|---|---|---|---|---|---|
excitation energy | |||||||||
121Pr | 59 | 62 | 120.95536(75)# | 600(300) ms | p | 120Ce | (3/2−) | ||
β+ (rare) | 121Ce | ||||||||
β+, p (rare) | 120La | ||||||||
122Pr | 59 | 63 | 121.95181(54)# | 500# ms | β+ | 122Ce | |||
123Pr | 59 | 64 | 122.94596(64)# | 800# ms | β+ | 123Ce | 3/2+# | ||
124Pr | 59 | 65 | 123.94296(64)# | 1.2(2) s | β+ | 124Ce | |||
β+, p (rare) | 123La | ||||||||
125Pr | 59 | 66 | 124.93783(43)# | 3.3(7) s | β+ | 125Ce | 3/2+# | ||
β+, p (rare) | 124La | ||||||||
126Pr | 59 | 67 | 125.93531(21)# | 3.12(18) s | β+ | 126Ce | (4,5,6) | ||
β+, p (rare) | 125La | ||||||||
127Pr | 59 | 68 | 126.93083(21)# | 4.2(3) s | β+ | 127Ce | 3/2+# | ||
127mPr | 600(200)# keV | 50# ms | 11/2− | ||||||
128Pr | 59 | 69 | 127.92879(3) | 2.84(9) s | β+ | 128Ce | (3+) | ||
β+, p (rare) | 127La | ||||||||
129Pr | 59 | 70 | 128.92510(3) | 32(3) s | β+ | 129Ce | (11/2−) | ||
129mPr | 382.7(5) keV | 1# ms | β+ | 129Ce | (11/2−) | ||||
130Pr | 59 | 71 | 129.92359(7) | 40.0(4) s | β+ | 130Ce | (6,7)(+#) | ||
130mPr | 100(100)# keV | 10# s | 2+# | ||||||
131Pr | 59 | 72 | 130.92026(6) | 1.50(3) min | β+ | 131Ce | (3/2+) | ||
131mPr | 152.4(2) keV | 5.7(2) s | IT (96.4%) | 131Pr | (11/2−) | ||||
β+ (3.59%) | 131Ce | ||||||||
132Pr | 59 | 73 | 131.91926(6) | 1.49(11) min | β+ | 132Ce | (2+) | ||
132mPr | 0(100)# keV | 20# s | β+ | 132Ce | (5+) | ||||
133Pr | 59 | 74 | 132.916331(13) | 6.5(3) min | β+ | 133Ce | (3/2+) | ||
133mPr | 192.05(14) keV | 1.1(2) µs | (11/2−) | ||||||
134Pr | 59 | 75 | 133.91571(4) | ~11 min | β+ | 134Ce | (5−) | ||
134mPr | 0(100)# keV | 17(2) min | β+ | 134Ce | 2− | ||||
135Pr | 59 | 76 | 134.913112(13) | 24(2) min | β+ | 135Ce | 3/2(+) | ||
135mPr | 358.06(6) keV | 105(10) µs | (11/2−) | ||||||
136Pr | 59 | 77 | 135.912692(13) | 13.1(1) min | β+ | 136Ce | 2+ | ||
137Pr | 59 | 78 | 136.910705(13) | 1.28(3) h | β+ | 137Ce | 5/2+ | ||
137mPr | 561.22(23) keV | 2.66(7) µs | 11/2− | ||||||
138Pr | 59 | 79 | 137.910755(15) | 1.45(5) min | β+ | 138Ce | 1+ | ||
138mPr | 348(23) keV | 2.12(4) h | β+ | 138Ce | 7− | ||||
139Pr | 59 | 80 | 138.908938(8) | 4.41(4) h | β+ | 139Ce | 5/2+ | ||
140Pr | 59 | 81 | 139.909076(7) | 3.39(1) min | β+ | 140Ce | 1+ | ||
140m1Pr | 127.5(3) keV | 0.35(2) µs | 5+ | ||||||
140m2Pr | 763.3(7) keV | 3.05(20) µs | (8)− | ||||||
141Pr[n 3] | 59 | 82 | 140.9076528(26) | Stable[n 4] | 5/2+ | 1.0000 | |||
142Pr | 59 | 83 | 141.9100448(26) | 19.12(4) h | β− (99.98%) | 142Nd | 2− | ||
EC (.0164%) | 142Ce | ||||||||
142mPr | 3.694(3) keV | 14.6(5) min | IT | 142Pr | 5− | ||||
143Pr[n 3] | 59 | 84 | 142.9108169(28) | 13.57(2) d | β− | 143Nd | 7/2+ | ||
144Pr | 59 | 85 | 143.913305(4) | 17.28(5) min | β− | 144Nd | 0− | ||
144mPr | 59.03(3) keV | 7.2(3) min | IT (99.93%) | 144Pr | 3− | ||||
β− (.07%) | 144Nd | ||||||||
145Pr | 59 | 86 | 144.914512(8) | 5.984(10) h | β− | 145Nd | 7/2+ | ||
146Pr | 59 | 87 | 145.91764(7) | 24.15(18) min | β− | 146Nd | (2)− | ||
147Pr | 59 | 88 | 146.918996(25) | 13.4(4) min | β− | 147Nd | (3/2+) | ||
148Pr | 59 | 89 | 147.922135(28) | 2.29(2) min | β− | 148Nd | 1− | ||
148mPr | 50(30)# keV | 2.01(7) min | β− | 148Nd | (4) | ||||
149Pr | 59 | 90 | 148.92372(9) | 2.26(7) min | β− | 149Nd | (5/2+) | ||
150Pr | 59 | 91 | 149.926673(28) | 6.19(16) s | β− | 150Nd | (1)− | ||
151Pr | 59 | 92 | 150.928319(25) | 18.90(7) s | β− | 151Nd | (3/2)(−#) | ||
152Pr | 59 | 93 | 151.93150(13) | 3.63(12) s | β− | 152Nd | 4+ | ||
153Pr | 59 | 94 | 152.93384(11) | 4.28(11) s | β− | 153Nd | 5/2−# | ||
154Pr | 59 | 95 | 153.93752(16) | 2.3(1) s | β− | 154Nd | (3+,2+) | ||
155Pr | 59 | 96 | 154.94012(32)# | 1# s [>300 ns] | β− | 155Nd | 5/2−# | ||
156Pr | 59 | 97 | 155.94427(43)# | 500# ms [>300 ns] | β− | 156Nd | |||
157Pr | 59 | 98 | 156.94743(43)# | 300# ms | β− | 157Nd | 5/2−# | ||
158Pr | 59 | 99 | 157.95198(64)# | 200# ms | β− | 158Nd | |||
159Pr | 59 | 100 | 158.95550(75)# | 100# ms | β− | 159Nd | 5/2−# |
- ↑ Abbreviations:
EC: Electron capture
IT: Isomeric transition - ↑ Bold for stable isotopes, bold italics for nearly-stable isotopes (half-life longer than the age of the universe)
- 1 2 Fission product
- ↑ Theoretically capable of spontaneous fission
Notes
- Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
- Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC, which use expanded uncertainties.
References
- ↑ Table of Standard Atomic Weights 2013 – CIAAW
- ↑ "Universal Nuclide Chart". nucleonica. (registration required (help)).
- Isotope masses from:
- G. Audi; A. H. Wapstra; C. Thibault; J. Blachot; O. Bersillon (2003). "The NUBASE evaluation of nuclear and decay properties" (PDF). Nuclear Physics A. 729: 3–128. Bibcode:2003NuPhA.729....3A. doi:10.1016/j.nuclphysa.2003.11.001.
- Isotopic compositions and standard atomic masses from:
- J. R. de Laeter; J. K. Böhlke; P. De Bièvre; H. Hidaka; H. S. Peiser; K. J. R. Rosman; P. D. P. Taylor (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683–800. doi:10.1351/pac200375060683.
- M. E. Wieser (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry. 78 (11): 2051–2066. doi:10.1351/pac200678112051. Lay summary.
- Half-life, spin, and isomer data selected from the following sources. See editing notes on this article's talk page.
- G. Audi; A. H. Wapstra; C. Thibault; J. Blachot; O. Bersillon (2003). "The NUBASE evaluation of nuclear and decay properties" (PDF). Nuclear Physics A. 729: 3–128. Bibcode:2003NuPhA.729....3A. doi:10.1016/j.nuclphysa.2003.11.001.
- National Nuclear Data Center. "NuDat 2.1 database". Brookhaven National Laboratory. Retrieved September 2005. Check date values in:
|access-date=
(help) - N. E. Holden (2004). "Table of the Isotopes". In D. R. Lide. CRC Handbook of Chemistry and Physics (85th ed.). CRC Press. Section 11. ISBN 978-0-8493-0485-9.
Isotopes of cerium | Isotopes of praseodymium | Isotopes of neodymium |
Table of nuclides |
Isotopes of the chemical elements | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 H |
2 He | ||||||||||||||||
3 Li |
4 Be |
5 B |
6 C |
7 N |
8 O |
9 F |
10 Ne | ||||||||||
11 Na |
12 Mg |
13 Al |
14 Si |
15 P |
16 S |
17 Cl |
18 Ar | ||||||||||
19 K |
20 Ca |
21 Sc |
22 Ti |
23 V |
24 Cr |
25 Mn |
26 Fe |
27 Co |
28 Ni |
29 Cu |
30 Zn |
31 Ga |
32 Ge |
33 As |
34 Se |
35 Br |
36 Kr |
37 Rb |
38 Sr |
39 Y |
40 Zr |
41 Nb |
42 Mo |
43 Tc |
44 Ru |
45 Rh |
46 Pd |
47 Ag |
48 Cd |
49 In |
50 Sn |
51 Sb |
52 Te |
53 I |
54 Xe |
55 Cs |
56 Ba |
72 Hf |
73 Ta |
74 W |
75 Re |
76 Os |
77 Ir |
78 Pt |
79 Au |
80 Hg |
81 Tl |
82 Pb |
83 Bi |
84 Po |
85 At |
86 Rn | |
87 Fr |
88 Ra |
104 Rf |
105 Db |
106 Sg |
107 Bh |
108 Hs |
109 Mt |
110 Ds |
111 Rg |
112 Cn |
113 Nh |
114 Fl |
115 Mc |
116 Lv |
117 Ts |
118 Og | |
57 La |
58 Ce |
59 Pr |
60 Nd |
61 Pm |
62 Sm |
63 Eu |
64 Gd |
65 Tb |
66 Dy |
67 Ho |
68 Er |
69 Tm |
70 Yb |
71 Lu | |||
89 Ac |
90 Th |
91 Pa |
92 U |
93 Np |
94 Pu |
95 Am |
96 Cm |
97 Bk |
98 Cf |
99 Es |
100 Fm |
101 Md |
102 No |
103 Lr | |||
|