Izvorni znanstveni članak
Search for double-photon decay of the 109Ag metastable state at 88 keV
Ksenofont Ilakovac
; Faculty of Science and Mathematics, University of Zagreb, P.O. Box 162, 41001 Zagreb and Ruđer Bošković Institute, Zagreb
Gorjana Jerbić-Zorc
; Faculty of Science and Mathematics, University of Zagreb, P.O. Box 162, 41001 Zagreb, Yugoslavia
Mladen Božin
; Faculty of Science and Mathematics, University of Zagreb, P.O. Box 162, 41001 Zagreb, Yugoslavia
Roko Pešić
; Faculty of Science and Mathematics, University of Zagreb, P.O. Box 162, 41001 Zagreb, Yugoslavia
Vladimir Horvat
; Faculty of Science and Mathematics, University of Zagreb, P.O. Box 162, 41001 Zagreb, Yugoslavia
Sažetak
Double-photon decay of the metastable state of 109Ag at 88 keV was studied. In the process photon pairs which share continuously the transition energy are emitted. Radioactive 109Cd was used as the generator of silver atoms in the excited state. A pair of germanium detectors in a 130° geometry and a fast-slow coincidence system with a 128 x 512 x 512 three-parameter pulse height analyzer were used in the measurements. Energy calibration was based on coincidence events of Ka and Kβ X-rays of silver with continuum radiation and on accidental coincidences of the 88 keV gamma rays. The sum spectrum shows no peak at the position where the events due to double-photon decay were expected. The analysis of data yielded an upper limit of the relative transition probability wyy/wy < 6 · 10-7. The theoretical estimates derived from the theory of Grechukhin are 12 · 10-7 for the square well potential and 5.6 · 10-7 for the spherical oscillator potential.
Ključne riječi
Hrčak ID:
331361
URI
Datum izdavanja:
10.1.1988.
Posjeta: 365 *