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

A. Vitéz, A. Krasznahorkay, J. Gulyás, M. Csatlós, L. Csige, Z. Gácsi, A. Krasznahorkay, B. M. Nyakó, F. W.N. De Boer, T. J. Ketel, J. Van Klinken

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

In a measurement of the angular correlation of e+e- pairs in the isovector M1 decay from 1+ level at 17.64 MeV in 8Be, 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/c2 the structure of the angular correlation can be described.

Original languageEnglish
Pages (from-to)483-487
Number of pages5
JournalActa Physica Polonica B
Volume39
Issue number2
Publication statusPublished - Feb 1 2008
Event30th Mazurian Lakes Conference on Physics - Nuclear Physics and the Fundamental Processes - Piaski, Poland
Duration: Sep 2 2007Sep 9 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Vitéz, A., Krasznahorkay, A., Gulyás, J., Csatlós, M., Csige, L., Gácsi, Z., Krasznahorkay, A., Nyakó, B. M., De Boer, F. W. N., Ketel, T. J., & Van Klinken, J. (2008). Anomalous internal pair creation in 8Be as a signature of the decay of a new particle. Acta Physica Polonica B, 39(2), 483-487.