Volume 57, Number 5, March 2002
|Page(s)||677 - 682|
|Published online||01 September 2002|
Tunable synchrotron radiation used to induce γ-emission from the 31 year isomer of
Center for Quantum Electronics, University of Texas at Dallas
Richardson, TX 75083-0688, USA
2 The Institute of Scientific and Industrial Research, University of Osaka Osaka 567-0047, Japan
3 SPring-8 / JASRI - Sayo-gun, Hyogo 679-5198, Japan
4 GREMI, CNRS, Université d'Orléans - Orléans, France
5 H. Hulubei National Institute of Physics and Nuclear Engineering Bucharest, Romania
6 IGE Foundation - Bucharest, Romania
7 Scientific Center "Institute for Nuclear Research" - Kiev, Ukraine
8 Air Force Office of Scientific Research, AFOSR/NE 801 Randolph St., Arlington, VA 22203-1977, USA
Accepted: 5 December 2001
A process for transferring energy from electron shells into nuclear excitation, NEET, has offered the promise for modulating nuclear properties at accessible levels of power. It had been proven recently by exciting a nuclear level of 197Au with synchrotron radiation, but measured couplings were far below theoretical objectives. Reported here is an extension of that approach for excitation to 178Hf isomeric nuclei. Isomeric targets were irradiated with X-rays in the beamline BL01B1 at the synchrotron radiation source SPring-8. Energies were tuned from 9 to 13 keV. In this range an excitation branch attributed to NEET was found to have a probability of relative to L-shell photoionization. The resulting emission of exoergic γ-photons was observed from the target at a rate approaching the theoretical maximum.
PACS: 23.20.Nx – Internal conversion and extranuclear effects / 25.20.Dc – Photon absorption and scattering / 27.70.+q –
© EDP Sciences, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.