Scientific Reports (Jun 2017)

Enhanced Atomic Desorption of 209 and 210 Francium from Organic Coating

  • Steinn Agustsson,
  • Giovanni Bianchi,
  • Roberto Calabrese,
  • Lorenzo Corradi,
  • Antonio Dainelli,
  • Alen Khanbekyan,
  • Carmela Marinelli,
  • Emilio Mariotti,
  • Luca Marmugi,
  • Leonardo Ricci,
  • Leonardo Stiaccini,
  • Luca Tomassetti,
  • Andrea Vanella

DOI
https://doi.org/10.1038/s41598-017-04397-y
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 7

Abstract

Read online

Abstract Controlled atomic desorption from organic Poly-DiMethylSiloxane coating is demonstrated for improving the loading efficiency of 209,210Fr magneto-optical traps. A three times increase in the cold atoms population is obtained with contact-less pulsed light-induced desorption, applied to different isotopes, either bosonic or fermionic, of Francium. A six times increase of 210Fr population is obtained with a desorption mechanism based on direct charge transfer from a triboelectric probe to the adatom-organic coating complex. Our findings provide new insight on the microscopic mechanisms of atomic desorption from organic coatings. Our results, obtained at room temperature so as to preserve ideal vacuum conditions, represent concrete alternatives, independent from the atomic species in use, for high-efficiency laser cooling in critical conditions.