8th International Topical Meeting on Photoacoustic and Photothermal Phenomena
8 ITMP³ / 8éme conférence internationale de photoacoustique et photothermique

J. Phys. IV France 04 (1994) C7-353-C7-356
DOI: 10.1051/jp4:1994782

Fundamental aspects of X-ray photoacoustic phenomena

T. Masujima¹, N. Ikuta¹, T. Toyoda², T. Hinoue³, H. Shiwaku⁴, H. Ohno⁴, A. Iida⁵ and M. Ando<sup>5

1</sup>  Hiroshima Univ. School of Medicine, Kasumi 1-2-3, Hiroshima 734, Japan
²  The Univ. of Electro-Communications, Chofu, Tokyo 182, Japan
³  Faculty of Sci., Osaka Univ., Machikaneyama 1-1, Toyonaka 560, Japan
⁴  Japan Atomic Energy Research Institute, Tokai Village, Ibaragi Pref. 319-11, Japan
⁵  Photon Factory, National Lab. for High Energy Physics, Oho 1-1, Tsukuba 305, Japan

Abstract
The mechanism why extended X-ray absorption fine structure (EXAFS) is observed in X-ray photoacoustic spectra, has been discussed from various points of view, however, it is still unclear. We continued to gather many aspects of data of X-ray photoacoustic phenomena in order to solve this question. Recently, we found EXAFS also in phase spectra of X-ray photoacoustic signal and related it with the signal shape. This phenomenon reflects the thermal depth depending on the absorption coefficients, however, there are left still unresolved aspects. All aspects of the data are shown and discussed in relation to its mechanism.

© EDP Sciences 1994