Interaction of Superconducting YBa2Cu3-xZnxO7-y with MeV Radiation

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Scientific Paper
Title Interaction of Superconducting YBa2Cu3-xZnxO7-y with MeV Radiation
Author(s) Glen A Robertson, Raymond A Lewis
Keywords Superconductivity, Radiation
Published 2009
Journal None
Volume AIP 1103
No. of pages 6
Pages 260-265

Abstract

When the high Tc superconductor Y-Ba-Cu-O is cooled with liquid nitrogen, the conduction holes form a macroscopic collective or entangled state. While collective effects have been observed with radiation energies up to 5 eV, no high-sensitivity experiments have previously been carried out to search for comparable effects with MeV radiation. Here an experiment using a pair of scintillation counters arranged to search for changes in the natural background of high energy radiation adjacent to a warm and cold Y-Ba-Cu-O superconductor is described. The experiment showed a shift toward higher pulse heights when the SC was cooled, with a 4 standard deviation excess of 9.12?2.28 events/ksec over the range of 0 to 18 MeV. The net difference spectrum shows a 5.5 standard deviation excess signal for the range of 3 to 6 MeV.