Isotope van curium

Die chemiese element curium (Cm), met ’n atoommassa van ongeveer 247 u, het geen stabiele isotope nie en word dus as ’n radioaktiewe element geklassifiseer. Die 20 isotope is onstabiel en het ’n relatief kort halfleeftyd (die meeste minder as ’n dag).

In die natuur kom geen curium voor nie; alle isotope is sinteties in ’n laboratorium berei. Die eerste sintetiese isotoop was 242Cm, in 1944.

Die kortslewende isotoop van curium is 234Cm, met ’n halfleeftyd van ongeveer 51 sekondes. Die langslewende een is 247Cm, met ’n halfleeftyd van 15,6 miljoen jaar.

## Oorsig[wysig | wysig bron]

Nuklied | Z (p)  | N (n)  | Isotopiese massa (u)  | Halfleeftyd | Radioaktiewe verval | VP | Kernspin

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Opwekkingsenergie
232Cm  | 96  | 136  |  | ± 1 min.  |  |  | 0+
233Cm  | 96  | 137  | 233,05077(8)  | 1 min.  | β+ | 233Am | 3/2+
α | 229Pu
234Cm  | 96  | 138  | 234,05016(2)  | 51(12) s  | β+ | 234Am  | 0+
α  | 230Pu
235Cm  | 96  | 139  | 235,05143(22)  | 5 min.  | β+ | 235Am  | 5/2+
α  | 231Pu
236Cm  | 96  | 140  | 236,05141(22)  | 10 min.  | β+ | 236Am  | 0+
α  | 232Pu
237Cm  | 96  | 141  | 237,05290(22)  | 20 min.  | β+ | 237Am  | 5/2+
α  | 233Pu
238Cm  | 96  | 142  | 238,05303(4)  | 2,4(1) uur  | EV (90%)  | 238Am  | 0+
α (10%)  | 234Pu
239Cm  | 96  | 143  | 239,05496(11)  | ± 2,9 uur  | β+ (99,9%)  | 239Am  | (7/2-)
α (0,1%)  | 235Pu
240Cm  | 96  | 144  | 240,0555295(25)  | 27(1) dae  | α (99,5%)  | 236Pu  | 0+
EV (0,5%)  | 240Am
SS (3,9 × 10−6%)  |
241Cm  | 96  | 145  | 241,0576530(23)  | 32,8(2) dae  | EV (99%)  | 241Am  | 1/2+
α (1%)  | 237Pu
242Cm  | 96  | 146  | 242,0588358(20)  | 162,8(2) dae  | α  | 238Pu  | 0+
SS (6,33 × 10−6%)  |
TV (10−14%)  | 208Pb, 34Si
β+β+ (selde)  | 242Pu
243Cm  | 96  | 147  | 243,0613891(22)  | 29,1(1) jaar  | α (99,71%)  | 239Pu  | 5/2+
EV (0,29%)  | 243Am
SS (5,3 × 10−9%)  |
243mCm  | 87,4(1) keV  | 1,08(3) µs  |  |  | 1/2+
244Cm  | 96  | 148  | 244,0627526(20)  | 18,10(2) jaar  | α  | 240Pu  | 0+
SS (1,34 × 10−4%)  |
244mCm  | 1040,188(12) keV  | 34(2) ms  | IV | 244Cm  | 6+
245Cm  | 96  | 149  | 245,0654912(22)  | 8510 jaar  | α  | 241Pu  | 7/2+
SS (6,1 × 10−7%)  |
245mCm  | 355,90(10) keV  | 290(20) ns  |  |  | 1/2+
246Cm  | 96  | 150  | 246,0672237(22)  | 4760 jaar  | α (99,97%)  | 242Pu  | 0+
SS (0,0261%)  |
247Cm  | 96  | 151  | 247,070354(5)  | 1,56(5) × 107 jaar  | α  | 243Pu  | 9/2-
248Cm  | 96  | 152  | 248,072349(5)  | 3,48(6) × 105 jaar  | α (91,74%)  | 244Pu  | 0+
SS (8,26%)  |
β−β− (selde)  | 248Cf
249Cm  | 96  | 153  | 249,075953(5)  | 64,15(3) min.  | β− | 249Bk  | 1/2+
249mCm  | 48,758(17) keV  | 23 µs  |  |  | (7/2+)
250Cm  | 96  | 154  | 250,078357(12)  | 8 300 jaar  | SS (80%)  |  | 0+
α (11%)  | 246Pu
β− (9%)  | 250Bk
251Cm  | 96  | 155  | 251,082285(24)  | 16,8(2) min.  | β− | 251Bk  | (1/2+)
252Cm  | 96  | 156  | 252,08487(32)  | < 1 dag  | β− | 252Bk  | 0+

## Isotope per element[wysig | wysig bron]

| 1H | 2He | 3Li | 4Be | 5B | 6C | 7N | 8O | 9F | 10Ne | 11Na | 12Mg | 13Al | 14Si | 15P | 16S | 17Cl | 18Ar | 19K

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20Ca | 21Sc | 22Ti | 23V | 24Cr | 25Mn | 26Fe | 27Co | 28Ni | 29Cu | 30Zn | 31Ga | 32Ge | 33As | 34Se | 35Br | 36Kr | 37Rb | 38Sr | 39Y
40Zr | 41Nb | 42Mo | 43Tc | 44Ru | 45Rh | 46Pd | 47Ag | 48Cd | 49In | 50Sn | 51Sb | 52Te | 53I | 54Xe | 55Cs | 56Ba | 57La | 58Ce | 59Pr
60Nd | 61Pm | 62Sm | 63Eu | 64Gd | 65Tb | 66Dy | 67Ho | 68Er | 69Tm | 70Yb | 71Lu | 72Hf | 73Ta | 74W | 75Re | 76Os | 77Ir | 78Pt | 79Au
80Hg | 81Tl | 82Pb | 83Bi | 84Po | 85At | 86Rn | 87Fr | 88Ra | 89Ac | 90Th | 91Pa | 92U | 93Np | 94Pu | 95Am | 96Cm | 97Bk | 98Cf | 99Es
100Fm | 101Md | 102No | 103Lr | 104Rf | 105Db | 106Sg | 107Bh | 108Hs | 109Mt | 110Ds | 111Rg | 112Cn | 113Nh | 114Fl | 115Mc | 116Lv | 117Ts | 118Og

## Bronne[wysig | wysig bron]

* R.B. Firestone, S.Y. Frank Chu & C.M. Baglin (1999) - Table of Isotopes (aanlyn weergawe van die CD-ROM)
* G. Audi, A.H. Wapstra, C. Thibault, J. Blachot & O. Bersillon (2003) - The NUBASE evaluation of nuclear and decay properties, Nuclear Physics A, 729, pp. 3-128
* 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), pp. 683–800
* M.E. Wieser (2006) - Atomic weights of the elements 2005 (IUPAC Technical Report), Pure and Applied Chemistry, 78 (11), pp. 2051–2066
* David R. Lide (2004) - CRC Handbook of Chemistry and Physics (85ste uitg.), hoofstuk 11, CRC Press - ISBN 978-0849304859
* Hierdie artikel is vertaal uit die Nederlandse Wikipedia