Storage of Nuclear Excitation Energy through Magnetic Switching

Yu. V. Shvyd'ko; T. Hertrich; U. van Bürck; E. Gerdau; O. Leupold; J. Metge; H. D. Rüter; S. Schwendy; G. V. Smirnov; W. Potzel; P. Schindelmann

doi:10.1103/PhysRevLett.77.3232

Storage of Nuclear Excitation Energy through Magnetic Switching

Yu. V. Shvyd'ko, T. Hertrich, U. van Bürck, E. Gerdau, O. Leupold, J. Metge, H. D. Rüter, S. Schwendy, G. V. Smirnov, W. Potzel, and P. Schindelmann

Phys. Rev. Lett. 77, 3232 – Published 7 October 1996

Abstract

The decay rate of $^{57} Fe$ nuclei in an $^{57} {FeBO}_{3}$ crystal excited by 14.4 keV synchrotron radiation pulses was controlled by switching the direction of the crystal magnetization. Abrupt switching some nanoseconds after excitation suppresses the coherent nuclear decay. Switching back at later times restores it, starting with an intense radiation spike. The enhanced delayed reemission is due to the release of the energy stored during the period of suppression. Suppression and restoration originate from drastic changes of the nuclear states and of the interference within the nuclear transitions.

Received 8 May 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.3232

Authors & Affiliations

Yu. V. Shvyd'ko¹, T. Hertrich², U. van Bürck², E. Gerdau¹, O. Leupold¹, J. Metge¹, H. D. Rüter¹, S. Schwendy¹, G. V. Smirnov³, W. Potzel², and P. Schindelmann²

¹II. Institut für Experimentalphysik, Universität Hamburg, D-22761 Hamburg, Germany
²Physik-Department E15, Technische Universität München, D-85748 Garching, Germany
³RRC, “Kurchatov Institute”, SU-1123182 Moscow, Russia