Atomic beam magnetic resonance apparatus for systematic measurement of hyperfine structure anomalies (Bohr-Weisskopf effect)

H. T. Duong, C. Ekström, M. Gustafsson, T. T. Inamura, P. Juncar, P. Lievens, I. Lindgren, S. Matsuki, T. Murayama, R. Neugart, T. Nilsson, T. Nomura, M. Pellarin, S. Penselin, J. Persson, J. Pinard, I. Ragnarsson, O. Redi, H. H. Stroke, J. L. Vialle

    Research output: Contribution to journalArticle

    Abstract

    An atomic beam magnetic resonance (ABMR) apparatus has been constructed at Orsay, and has been installed at the CERN PS Booster ISOLDE mass separator facility for "on-line" work with radioactive isotopes in a program to measure hyperfine structure anomalies (the Bohr-Weisskopf effect) over long isotopic chains. The hfs anomalies result from the effect of the spatial distribution of the nuclear magnetization on the atomic hfs interaction. Constructional details of the system are described: emphasis is placed on the measurement of nuclear g-factors by a triple resonance, laser state selected, ABMR method. A precision better than 10-4 for gI values has been obtained in stable atomic beam tests, leading to hfs anomaly measurements better than 10 percent. Two types of detection systems are described: laser fluorescence and surface ionization coupled with mass spectrometry.

    Original languageEnglish (US)
    Pages (from-to)465-474
    Number of pages10
    JournalNuclear Inst. and Methods in Physics Research, A
    Volume325
    Issue number3
    DOIs
    StatePublished - Feb 15 1993

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Instrumentation

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