Selective suppression of negative ions by lasers

D. Berkovits, E. Boaretto, G. Hollos, W. Kutschera, R. Naaman, M. Paul, Z. Vager

Research output: Contribution to journalLetterpeer-review

42 Scopus citations


A method of selective suppression of negative ions by electron photodetachment with a laser beam is investigated. The interaction of 532 nm photons from a Nd:YAG laser with negative ions of 32S, 37Cl and 40Ca16O was studied. A strong depletion of 32S- and 40Ca16O- beam intensities, but no effect on 37Cl- ions, was observed. Photodetachment cross sections of (1.0±0.2)×10-17 cm2 and (7±3)×10-17 cm2 were measured for 32S- and 40Ca16O-, respectively. Implications for accelerator mass spectrometry measurements are discussed.

Original languageEnglish
Pages (from-to)663-666
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number3
StatePublished - 15 Sep 1989
Externally publishedYes

Bibliographical note

Funding Information:
We should like to thank C.W . Lineberger and P. Thieberger for providing information on photodetach- ment cross sections and the Brookhaven pulsed ion source, respectively, and G. Sprouse for discussion on laser resonant excitation . The enthusiastic support of the technical staff of the Pelletron Accelerator is gratefully acknowledged. This work was supported in part by the USA-Israel Binational Science Foundation and the U .S . Department of Energy, Nuclear Physics Division, under Contract W-31-109-ENG-38.


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