18F intense spot positron source for spin polarized positron beam

Ichiro Fujiwara, Yoshiko Itoh, Ren Iwata, Fuminori Saito, Akira Goto

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)

Abstract

An intense positron source, 18F, with a half life of 110 min has been developed for spin polarized positron beams. The radioactive 18F (ca. 30 GBq) is produced in 1 ml 18O-water target via the 18O(p,n)18F reaction with a 14 MeV proton beam at a current of 20 μA in the AVF cyclotron vault. An irradiated 18O-water is transferred to an experimental vault downstairs to be trapped and placed just in front of the moderator. The electrodeposition method was used to collect and fix 18F on a small spot from 18O-water. Recovery of 18F on the graphite cylinder of 5 mm is 69% and 35% for 3 mm cylinder, respectively.

Original languageEnglish
Pages (from-to)30-33
Number of pages4
JournalApplied Surface Science
Volume149
Issue number1
DOIs
Publication statusPublished - 1999
Externally publishedYes
EventProceeding of the 1998 8th International Workshop on Slow-Positron Beam Techniques fot Solids and Surfaces - Cape Town, S Afr
Duration: 1998 Sep 61998 Sep 12

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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