@article{6bc1a2fcddb04516abdb13b47a8bfa7f,
title = "M{\"o}ssbauer effect in Kr83 trapped in a clathrate compound",
author = "Y. Hazoni and P. Hillman and M. Pasternak and S. Ruby",
note = "Funding Information: Recently, Hazoni et al. measured the lifetime of the 9.3 keV state in Kr 83 as 148 ns 1). Following on this work, we have measured the M~ssbauer effect in this isotope, firstly in frozen krypton, and secondly trapped in a clathrate compound. In the frozen krypton experiment, polythene bags filled with natural krypton gas were strapped onto metal strips dipping into liquid air. Irradiation of the source bag in the IRRI swimming pool reactor for 10 minutes at 1013 n cm -2 sec-Iproduced an adequate strength of Kr 83 in its 2 hour isomeric 42 keV state via the Kr82(n, 7) reaction. A small positive on-off effect was found with essentially unknown absorber thickness and homogeneity, just enough to encourage us to proceed to the second stage. The clathrates are crystals which are formed, under certain conditions, with cage-like holes in them each large enough to contain one atom or even molecule of foreign material and trap it without any chemical reaction taking place 2). The centers of the atoms surrounding the cage are dis- * The research reported in this document has been spon-sored in part by the Aeronautical Systems Division, AFSC, through the European Office, Aerospace Re-search, United States Air Force. ** I.A.E.C. fellowship 1960-61. Present address: Wes-tinghouse Research Laboratories, East Pittsburgh, Pc., U.S.A.",
year = "1962",
month = nov,
day = "1",
doi = "10.1016/0031-9163(62)90134-8",
language = "אנגלית",
volume = "2",
pages = "337--339",
journal = "Physics Letters",
issn = "0031-9163",
publisher = "North-Holland Publ Co",
number = "7",
}