鋇嘅同位素
鋇嘅同位素有50個,其中7個存在喺自然環境中,但係嗰7個同位素中只係5個係穩定嘅,其他都具半衰期或放射線,例如130Ba,佢嘅豐度係0.00106,半衰期係4.01021年。其餘嘅同位素都係人工嘅,難以存在喺自然界之中,即使係半衰期有10年嘅133Ba。
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 | |||||||
114Ba | 56 | 58 | 113.95068(15) | 530(230) ms [0.43(+30-15) s] | 0+ | ||
115Ba | 56 | 59 | 114.94737(64)# | 0.45(5) s | (5/2+)# | ||
116Ba | 56 | 60 | 115.94138(43)# | 1.3(2) s | 0+ | ||
117Ba | 56 | 61 | 116.93850(32)# | 1.75(7) s | (3/2)(+#) | ||
118Ba | 56 | 62 | 117.93304(21)# | 5.2(2) s | 0+ | ||
119Ba | 56 | 63 | 118.93066(21) | 5.4(3) s | (5/2+) | ||
120Ba | 56 | 64 | 119.92604(32) | 24(2) s | 0+ | ||
121Ba | 56 | 65 | 120.92405(15) | 29.7(15) s | 5/2(+) | ||
122Ba | 56 | 66 | 121.91990(3) | 1.95(15) min | 0+ | ||
123Ba | 56 | 67 | 122.918781(13) | 2.7(4) min | 5/2(+) | ||
124Ba | 56 | 68 | 123.915094(13) | 11.0(5) min | 0+ | ||
125Ba | 56 | 69 | 124.914473(12) | 3.5(4) min | 1/2(+#) | ||
126Ba | 56 | 70 | 125.911250(13) | 100(2) min | 0+ | ||
127Ba | 56 | 71 | 126.911094(12) | 12.7(4) min | 1/2+ | ||
127mBa | 80.33(12) keV | 1.9(2) s | 7/2- | ||||
128Ba | 56 | 72 | 127.908318(11) | 2.43(5) d | 0+ | ||
129Ba | 56 | 73 | 128.908679(12) | 2.23(11) h | 1/2+ | ||
129mBa | 8.42(6) keV | 2.16(2) h | 7/2+# | ||||
130Ba | 56 | 74 | 129.9063208(30) | 穩定 [>4.0E+21 a] | 0+ | 0.00106(1) | |
130mBa | 2475.12(18) keV | 9.54(14) ms | 8- | ||||
131Ba | 56 | 75 | 130.906941(3) | 11.50(6) d | 1/2+ | ||
131mBa | 187.14(12) keV | 14.6(2) min | 9/2- | ||||
132Ba | 56 | 76 | 131.9050613(11) | 穩定 [>300E+18 a] | 0+ | 0.00101(1) | |
133Ba | 56 | 77 | 132.9060075(11) | 10.51(5) a | 1/2+ | ||
133mBa | 288.247(9) keV | 38.9(1) h | 11/2- | ||||
134Ba | 56 | 78 | 133.9045084(4) | 穩定 | 0+ | 0.02417(18) | |
135Ba | 56 | 79 | 134.9056886(4) | 穩定 | 3/2+ | 0.06592(12) | |
135mBa | 268.22(2) keV | 28.7(2) h | 11/2- | ||||
136Ba | 56 | 80 | 135.9045759(4) | 穩定 | 0+ | 0.07854(24) | |
136mBa | 2030.466(18) keV | 308.4(19) ms | 7- | ||||
137Ba | 56 | 81 | 136.9058274(5) | 穩定 | 3/2+ | 0.11232(24) | |
137m1Ba | 661.659(3) keV | 2.552(1) min | 11/2- | ||||
137m2Ba | 2349.1(4) keV | 0.59(10) µs | (17/2-) | ||||
138Ba | 56 | 82 | 137.9052472(5) | 穩定 | 0+ | 0.71698(42) | |
138mBa | 2090.54(6) keV | 800(100) ns | 6+ | ||||
139Ba | 56 | 83 | 138.9088413(5) | 83.06(28) min | 7/2- | ||
140Ba | 56 | 84 | 139.910605(9) | 12.752(3) d | 0+ | ||
141Ba | 56 | 85 | 140.914411(9) | 18.27(7) min | 3/2- | ||
142Ba | 56 | 86 | 141.916453(7) | 10.6(2) min | 0+ | ||
143Ba | 56 | 87 | 142.920627(14) | 14.5(3) s | 5/2- | ||
144Ba | 56 | 88 | 143.922953(14) | 11.5(2) s | 0+ | ||
145Ba | 56 | 89 | 144.92763(8) | 4.31(16) s | 5/2- | ||
146Ba | 56 | 90 | 145.93022(8) | 2.22(7) s | 0+ | ||
147Ba | 56 | 91 | 146.93495(22)# | 0.893(1) s | (3/2+) | ||
148Ba | 56 | 92 | 147.93772(9) | 0.612(17) s | 0+ | ||
149Ba | 56 | 93 | 148.94258(21)# | 344(7) ms | 3/2-# | ||
150Ba | 56 | 94 | 149.94568(43)# | 300 ms | 0+ | ||
151Ba | 56 | 95 | 150.95081(43)# | 200# ms [>300 ns] | 3/2-# | ||
152Ba | 56 | 96 | 151.95427(54)# | 100# ms | 0+ | ||
153Ba | 56 | 97 | 152.95961(86)# | 80# 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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