Relation of contact densities with Mössbauer isomer shifts for 35.46 keV M1 transition of125Te |
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| Authors: | T Miura Y Hatsukawa M Yanaga K Endo H Nakahara M Fujioka E Tanaka A Hashizume |
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| Institution: | (1) Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Fukasawa, 158 Setagaya, Tokyo, Japan;(2) Cyclotron and Radioisotope Center, Tohoku University, 980 Sendai, Japan;(3) Department of Physics, Faculty of Science, Tohoku University, 980 Sendai, Japan;(4) Radiation Laboratory, Institute of Physical and Chemical Research, Wako, 351-01 Saitama, Japan |
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| Abstract: | The internal conversion electron and Mössbauer isomer shifts associated with the 35.46 keV M1 transition of125Te were observed for different metal samples into which radioactive125I as probe atoms were introduced by means of ion-implantation. From the correlation between the Mössbauer isomer shifts and intensity ratios of O shell to NI shell conversion electrons, a relation between 5s-electron contact densityp 5s(0) in a.u. and isomer shift δ in mm/s was deduced to bep 5s(0)=106+30.3 δ±4.3(δ?0.30)2+0.069]1/2, where δ was measured relative to ZnTe in mm/s. The change of the nuclear charge radius in the 35.46 keV M1 transition of125Te was found to be ΔR/R=(0.85±0.12)×10?4 (corresponding to Δ<r 2>=(3.7±0.5)×10?3 fm2) when a theoretical 4s-electron contact density of 928 a.u. was used. |
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