Search for X-ray induced acceleration of the decay of the 31-yr isomer of Hf-178 using synchrotron radiation - art. no. 072503

Authors
Ahmad, I Banar, JC Becker, JA Gemmell, DS Kraemer, A Mashayekhi, A McNabb, DP Miller, GG Moore, EF Pangault, LN Rundberg, RS Schiffer, JP Shastri, SD Wang, TF Wilhelmy, JB
Citation
I. Ahmad et al., Search for X-ray induced acceleration of the decay of the 31-yr isomer of Hf-178 using synchrotron radiation - art. no. 072503, PHYS REV L, 8707(7), 2001, pp. 2503
Citations number
17
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
8707
Issue
7
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010813)8707:7<2503:SFXIAO>2.0.ZU;2-8
Abstract
Enhanced decay of the 31-yr isomer of Hf-178 induced by x-ray irradiation h as been reported previously. Here we describe an attempt to reproduce this result with an intense "white" x-ray beam from the Advanced Photon Source. No induced decay was observed. The upper limits for the energy-integrated c ross sections for such a process, over the range of energies of 20-60 keV x rays, are less than 2 x 10(-27) cm(2) keV, below the previously reported v alues by more than 5 orders of magnitude; at 8 keV the limit is 5 x 10(-26) cm(2) keV.