Table
| nuclide symbol |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s) |
daughter isotope(s) |
nuclear spin |
representative isotopic composition (mole fraction) |
range of natural variation (mole fraction) |
|---|---|---|---|---|---|---|---|---|---|
| excitation energy | |||||||||
| 142Er | 68 | 74 | 141.97231(47)# | 0+ | |||||
| 143Er | 68 | 75 | 142.96634(64)# | 200# ms | 9/2-# | ||||
| 144Er | 68 | 76 | 143.96038(43)# | 400# ms | β+ | 144Ho | 0+ | ||
| 145Er | 68 | 77 | 144.95739(43)# | 900(300) ms | β+ | 145Ho | 1/2+# | ||
| β+, p (rare) | 144Dy | ||||||||
| 146Er | 68 | 78 | 145.95200(32)# | 1.7(6) s | β+ | 146Ho | 0+ | ||
| β+, p | 145Dy | ||||||||
| 147Er | 68 | 79 | 146.94949(32)# | ~2.5 s | β+ | 147Ho | (1/2+) | ||
| β+, p | 146Dy | ||||||||
| 147mEr | 100(50)# keV | 2.5(2) s | β+ | 147Ho | (11/2-) | ||||
| 148Er | 68 | 80 | 147.94455(21)# | 4.6(2) s | β+ (99.85%) | 148Ho | 0+ | ||
| β+, p (.15%) | 147Dy | ||||||||
| 149Er | 68 | 81 | 148.94231(3) | 4(2) s | β+ (93%) | 149Ho | (1/2+) | ||
| β+, p (7%) | 148Dy | ||||||||
| 149m1Er | 741.8(2) keV | 8.9(2) s | β+ (96.5%) | 149Ho | (11/2-) | ||||
| IT (3.5%) | 149Er | ||||||||
| β+, p (.18%) | 148Dy | ||||||||
| 149m2Er | 2611.1(3) keV | 0.61(8) µs | (19/2+) | ||||||
| 149m3Er | 3242.7+X keV | 4.8(1) µs | (27/2-) | ||||||
| 150Er | 68 | 82 | 149.937914(18) | 18.5(7) s | β+ | 150Ho | 0+ | ||
| 151Er | 68 | 83 | 150.937449(18) | 23.5(13) s | β+ | 151Ho | (7/2-) | ||
| 151m1Er | 2585.5(6) keV | 580(20) ms | IT (95.3%) | 151Er | (27/2-) | ||||
| β+ (4.7%) | 151Ho | ||||||||
| 151m2Er | 10286+X keV | 0.42(5) µs | (67/2,69/2,71/2) | ||||||
| 152Er | 68 | 84 | 151.935050(11) | 10.3(1) s | α (90%) | 148Dy | 0+ | ||
| β+ (10%) | 152Ho | ||||||||
| 153Er | 68 | 85 | 152.935063(9) | 37.1(2) s | α (53%) | 149Dy | 7/2(-) | ||
| β+ (47%) | 153Ho | ||||||||
| 154Er | 68 | 86 | 153.932783(6) | 3.73(9) min | β+ (99.53%) | 154Ho | 0+ | ||
| α (.47%) | 150Dy | ||||||||
| 155Er | 68 | 87 | 154.933209(7) | 5.3(3) min | β+ (99.98%) | 155Ho | 7/2- | ||
| α (.022%) | 151Dy | ||||||||
| 156Er | 68 | 88 | 155.931065(26) | 19.5(10) min | β+ | 156Ho | 0+ | ||
| 157Er | 68 | 89 | 156.93192(3) | 18.65(10) min | β+ | 157Ho | 3/2- | ||
| 157mEr | 155.4(3) keV | 76(6) ms | IT | 157Er | (9/2+) | ||||
| 158Er | 68 | 90 | 157.929893(27) | 2.29(6) h | EC | 158Ho | 0+ | ||
| 159Er | 68 | 91 | 158.930684(5) | 36(1) min | β+ | 159Ho | 3/2- | ||
| 159m1Er | 182.602(24) keV | 337(14) ns | 9/2+ | ||||||
| 159m2Er | 429.05(3) keV | 590(60) ns | 11/2- | ||||||
| 160Er | 68 | 92 | 159.929083(26) | 28.58(9) h | EC | 160Ho | 0+ | ||
| 161Er | 68 | 93 | 160.929995(10) | 3.21(3) h | β+ | 161Ho | 3/2- | ||
| 161mEr | 396.44(4) keV | 7.5(7) µs | 11/2- | ||||||
| 162Er | 68 | 94 | 161.928778(4) | Observationally Stable | 0+ | 0.00139(5) | |||
| 163Er | 68 | 95 | 162.930033(6) | 75.0(4) min | β+ | 163Ho | 5/2- | ||
| 163mEr | 445.5(6) keV | 580(100) ns | (11/2-) | ||||||
| 164Er | 68 | 96 | 163.929200(3) | Observationally Stable | 0+ | 0.01601(3) | |||
| 165Er | 68 | 97 | 164.930726(3) | 10.36(4) h | EC | 165Ho | 5/2- | ||
| 166Er | 68 | 98 | 165.9302931(27) | Observationally Stable | 0+ | 0.33503(36) | |||
| 167Er | 68 | 99 | 166.9320482(27) | Observationally Stable | 7/2+ | 0.22869(9) | |||
| 167mEr | 207.801(5) keV | 2.269(6) s | IT | 167Er | 1/2- | ||||
| 168Er | 68 | 100 | 167.9323702(27) | Observationally Stable | 0+ | 0.26978(18) | |||
| 169Er | 68 | 101 | 168.9345904(27) | 9.392(18) d | β- | 169Tm | 1/2- | ||
| 170Er | 68 | 102 | 169.9354643(30) | Observationally Stable | 0+ | 0.14910(36) | |||
| 171Er | 68 | 103 | 170.9380298(30) | 7.516(2) h | β- | 171Tm | 5/2- | ||
| 171mEr | 198.6(1) keV | 210(10) ns | 1/2- | ||||||
| 172Er | 68 | 104 | 171.939356(5) | 49.3(3) h | β- | 172Tm | 0+ | ||
| 173Er | 68 | 105 | 172.94240(21)# | 1.434(17) min | β- | 173Tm | (7/2-) | ||
| 174Er | 68 | 106 | 173.94423(32)# | 3.2(2) min | β- | 174Tm | 0+ | ||
| 175Er | 68 | 107 | 174.94777(43)# | 1.2(3) min | β- | 175Tm | (9/2+) | ||
| 176Er | 68 | 108 | 175.95008(43)# | 20# s | β- | 176Tm | 0+ | ||
| 177Er | 68 | 109 | 176.95405(54)# | 3# s | β- | 177Tm | 1/2-# | ||
Read more about this topic: Isotopes Of Erbium
Famous quotes containing the word table:
“Language was vigorous because, because ... editors usually “laid all the cards on the table so as to leave their hands ... free for more persuasive arguments!” The citizenry at large retaliated as best they could.”
—State of Utah, U.S. public relief program (1935-1943)
“Life is a thin narrowness of taken-for-granted, a plank over a canyon in a fog. There is something under our feet, the taken-for-granted. A table is a table, food is food, we are we—because we don’t question these things. And science is the enemy because it is the questioner. Faith saves our souls alive by giving us a universe of the taken-for-granted.”
—Rose Wilder Lane (1886–1968)
“The salt person and blasted place
I furnish with the meat of a fable;
If the dead starve, their stomachs turn to tumble
An upright man in the antipodes
Or spray-based and rock-chested sea:
Over the past table I repeat this present grace.”
—Dylan Thomas (1914–1953)