Anomalous internal pair creation in Be-8 as a signature of the decay of a new particle

A. Vitez*, A. Krasznahorkay, J. Gulyas, M. Csatlos, L. Csige, Z. Gacsi, A. Krasznahorkay, B. M. Nyako, F. W. N. De Boer, T. J. Ketel, J. Van Klinken

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

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    In a measurement of the angular correlation of e(+)e(-) pairs in the isovector M1 decay from 1(+) level at 17.64 MeV in Be-8, a large deviation was found from quantum electrodynamics(QED)-prediction for internal pair conversion (IPC). By postulating the emission of a neutral particle with a mass of 12 (2.5) MeV/c(2) the structure of the angular correlation can be described.

    Original languageEnglish
    Pages (from-to)483-487
    Number of pages5
    JournalActa Physica Polonica B
    Issue number2
    Publication statusPublished - Feb-2008
    Event30th Mazurian Lakes Conference on Physics - , Poland
    Duration: 2-Sept-20079-Sept-2007


    • 9 MEV/C(2)
    • MASS

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