鐠嘅同位素
自然界中嘅鐠只係有一種穩定同位素141-Pr,但有38種放射性同位素,其中比較穩定嘅有143-Pr,半衰期係13.57日;142-Pr,半衰期係19.12個鐘。其餘嘅放射性同位素嘅半衰期都唔超過5.985個鐘,大部分嘅半衰期少過33秒。鐠重有6個亞穩態,比較穩定嘅係138m-Pr(半衰期2.12個鐘)、142m-Pr(半衰期14.6分鐘)同134m-Pr(半衰期11分鐘)。
鐠嘅同位素原子量從120.955 u(121-Pr)到158.955 u(159-Pr)。穩定嘅同位素141-Pr如果放出β射線,會得到電子。主要放射產物係鈰嘅同位素鈰-58同釹嘅同位素釹-60。
圖表
編輯符號 | Z(p) | N(n) | 質量(u) | 半衰期 | 原子核自旋 | 相對豐度 | 相對豐度嘅變化率 |
---|---|---|---|---|---|---|---|
激發能量 | |||||||
121Pr | 59 | 62 | 120.95536(75)# | 600(300) ms | (3/2-) | ||
122Pr | 59 | 63 | 121.95181(54)# | 500# ms | |||
123Pr | 59 | 64 | 122.94596(64)# | 800# ms | 3/2+# | ||
124Pr | 59 | 65 | 123.94296(64)# | 1.2(2) s | |||
125Pr | 59 | 66 | 124.93783(43)# | 3.3(7) s | 3/2+# | ||
126Pr | 59 | 67 | 125.93531(21)# | 3.12(18) s | (4,5,6) | ||
127Pr | 59 | 68 | 126.93083(21)# | 4.2(3) s | 3/2+# | ||
127mPr | 600(200)# keV | 50# ms | 11/2- | ||||
128Pr | 59 | 69 | 127.92879(3) | 2.84(9) s | (3+) | ||
129Pr | 59 | 70 | 128.92510(3) | 32(3) s | (11/2-) | ||
129mPr | 382.7(5) keV | 1# ms | (11/2-) | ||||
130Pr | 59 | 71 | 129.92359(7) | 40.0(4) s | (6,7)(+#) | ||
130mPr | 100(100)# keV | 10# s | 2+# | ||||
131Pr | 59 | 72 | 130.92026(6) | 1.50(3) min | (3/2+) | ||
131mPr | 152.4(2) keV | 5.7(2) s | (11/2-) | ||||
132Pr | 59 | 73 | 131.91926(6) | 1.49(11) min | (2+) | ||
132mPr | 0(100)# keV | 20# s | (5+) | ||||
133Pr | 59 | 74 | 132.916331(13) | 6.5(3) min | (3/2+) | ||
133mPr | 192.05(14) keV | 1.1(2) µs | (11/2-) | ||||
134Pr | 59 | 75 | 133.91571(4) | ~11 min | (5-) | ||
134mPr | 0(100)# keV | 17(2) min | 2- | ||||
135Pr | 59 | 76 | 134.913112(13) | 24(2) min | 3/2(+) | ||
135mPr | 358.06(6) keV | 105(10) µs | (11/2-) | ||||
136Pr | 59 | 77 | 135.912692(13) | 13.1(1) min | 2+ | ||
137Pr | 59 | 78 | 136.910705(13) | 1.28(3) h | 5/2+ | ||
137mPr | 561.22(23) keV | 2.66(7) µs | 11/2- | ||||
138Pr | 59 | 79 | 137.910755(15) | 1.45(5) min | 1+ | ||
138mPr | 348(23) keV | 2.12(4) h | 7- | ||||
139Pr | 59 | 80 | 138.908938(8) | 4.41(4) h | 5/2+ | ||
140Pr | 59 | 81 | 139.909076(7) | 3.39(1) min | 1+ | ||
140m1Pr | 127.5(3) keV | 0.35(2) µs | 5+ | ||||
140m2Pr | 763.3(7) keV | 3.05(20) µs | (8)- | ||||
141Pr | 59 | 82 | 140.9076528(26) | 穩定 | 5/2+ | 1.0000 | |
142Pr | 59 | 83 | 141.9100448(26) | 19.12(4) h | 2- | ||
142mPr | 3.694(3) keV | 14.6(5) min | 5- | ||||
143Pr | 59 | 84 | 142.9108169(28) | 13.57(2) d | 7/2+ | ||
144Pr | 59 | 85 | 143.913305(4) | 17.28(5) min | 0- | ||
144mPr | 59.03(3) keV | 7.2(3) min | 3- | ||||
145Pr | 59 | 86 | 144.914512(8) | 5.984(10) h | 7/2+ | ||
146Pr | 59 | 87 | 145.91764(7) | 24.15(18) min | (2)- | ||
147Pr | 59 | 88 | 146.918996(25) | 13.4(4) min | (3/2+) | ||
148Pr | 59 | 89 | 147.922135(28) | 2.29(2) min | 1- | ||
148mPr | 50(30)# keV | 2.01(7) min | (4) | ||||
149Pr | 59 | 90 | 148.92372(9) | 2.26(7) min | (5/2+) | ||
150Pr | 59 | 91 | 149.926673(28) | 6.19(16) s | (1)- | ||
151Pr | 59 | 92 | 150.928319(25) | 18.90(7) s | (3/2)(-#) | ||
152Pr | 59 | 93 | 151.93150(13) | 3.63(12) s | 4+ | ||
153Pr | 59 | 94 | 152.93384(11) | 4.28(11) s | 5/2-# | ||
154Pr | 59 | 95 | 153.93752(16) | 2.3(1) s | (3+,2+) | ||
155Pr | 59 | 96 | 154.94012(32)# | 1# s [>300 ns] | 5/2-# | ||
156Pr | 59 | 97 | 155.94427(43)# | 500# ms [>300 ns] | |||
157Pr | 59 | 98 | 156.94743(43)# | 300# ms | 5/2-# | ||
158Pr | 59 | 99 | 157.95198(64)# | 200# ms | |||
159Pr | 59 | 100 | 158.95550(75)# | 100# ms | 5/2-# |
備註:有#嘅數據代表冇經過實驗嘅證明,只係理論推測,而用咗括號括係代表數據唔確定。
參攷
編輯- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.
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