Discovery of Scandium, Titanium, Mercury, and Einsteinium Isotopes D. Meierfrankenfeld, A. Bury, M. Thoennessen∗ National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Abstract Currently, twenty-three scandium, twenty-five titanium, forty mercury and seventeen einsteinium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented. arXiv:1003.5128v2 [nucl-ex] 8 Sep 2010 ∗Corresponding author. Email address: [email protected] (M. Thoennessen) Preprint submitted to Atomic Data and Nuclear Data Tables October 25, 2018 Contents 1. Introduction . 4 2. Discovery of 39−61Sc.................................................................................... 4 2.1. 39Sc............................................................................................. 5 2.2. 40Sc............................................................................................. 6 2.3. 41Sc............................................................................................. 6 2.4. 42Sc............................................................................................. 6 2.5. 43Sc............................................................................................. 6 2.6. 44Sc............................................................................................. 7 2.7. 45Sc............................................................................................. 7 2.8. 46Sc............................................................................................. 7 2.9. 47Sc............................................................................................. 7 2.10. 48Sc............................................................................................. 8 2.11. 49Sc............................................................................................. 8 2.12. 50Sc............................................................................................. 8 2.13. 51Sc............................................................................................. 8 2.14. 52;53Sc........................................................................................... 9 2.15. 54;55Sc........................................................................................... 9 2.16. 56−58Sc.......................................................................................... 9 2.17. 59−61Sc.......................................................................................... 9 3. Discovery of 39−63Ti.................................................................................... 9 3.1. 39Ti............................................................................................. 11 3.2. 40Ti............................................................................................. 11 3.3. 41Ti............................................................................................. 11 3.4. 42Ti............................................................................................. 11 3.5. 43Ti............................................................................................. 12 3.6. 44Ti............................................................................................. 12 3.7. 45Ti............................................................................................. 12 3.8. 46;47Ti........................................................................................... 12 3.9. 48Ti............................................................................................. 12 3.10. 49;50Ti........................................................................................... 13 3.11. 51Ti............................................................................................. 13 3.12. 52Ti............................................................................................. 13 3.13. 53Ti............................................................................................. 13 3.14. 54;55Ti........................................................................................... 13 3.15. 56Ti............................................................................................. 14 3.16. 57Ti............................................................................................. 14 3.17. 58Ti............................................................................................. 14 3.18. 59−61Ti.......................................................................................... 14 3.19. 62;63Ti........................................................................................... 14 4. Discovery of 171−210Hg.................................................................................. 15 2 4.1. 171Hg............................................................................................ 16 4.2. 172;173Hg......................................................................................... 16 4.3. 174Hg............................................................................................ 16 4.4. 175;176Hg......................................................................................... 16 4.5. 177Hg............................................................................................ 17 4.6. 178Hg............................................................................................ 17 4.7. 179;180Hg......................................................................................... 17 4.8. 181Hg............................................................................................ 17 4.9. 182Hg............................................................................................ 18 4.10. 183;184Hg......................................................................................... 18 4.11. 185−187Hg........................................................................................ 18 4.12. 188Hg............................................................................................ 18 4.13. 189Hg............................................................................................ 18 4.14. 190Hg............................................................................................ 19 4.15. 191Hg............................................................................................ 19 4.16. 192;193Hg......................................................................................... 19 4.17. 194Hg............................................................................................ 19 4.18. 195Hg............................................................................................ 20 4.19. 196Hg............................................................................................ 20 4.20. 197Hg............................................................................................ 20 4.21. 198−201Hg........................................................................................ 20 4.22. 202Hg............................................................................................ 20 4.23. 203Hg............................................................................................ 20 4.24. 204Hg............................................................................................ 21 4.25. 205Hg............................................................................................ 21 4.26. 206Hg............................................................................................ 21 4.27. 207Hg............................................................................................ 21 4.28. 208Hg............................................................................................ 21 4.29. 209Hg............................................................................................ 22 4.30. 210Hg............................................................................................ 22 5. Discovery of the Element Einsteinium . 22 6. Discovery of 241−257Es.................................................................................. 23 6.1. 241Es............................................................................................ 23 6.2. 242Es............................................................................................ 23 6.3. 243;244Es......................................................................................... 25 6.4. 245Es............................................................................................ 25 6.5. 246Es............................................................................................ 25 6.6. 247Es............................................................................................ 25 6.7. 248Es............................................................................................ 26 6.8. 249−252Es ........................................................................................ 26 6.9. 253Es............................................................................................ 26 3 6.10. 254Es............................................................................................ 27 6.11. 255Es............................................................................................ 27 6.12. 256Es............................................................................................ 27 6.13.