dc.creator Bree, Alan en_US dc.creator Taliani, Carlo en_US dc.creator Edelson, Martin en_US dc.date.accessioned 2006-06-15T14:06:54Z dc.date.available 2006-06-15T14:06:54Z dc.date.issued 1978 en_US dc.identifier 1978-TD-03 en_US dc.identifier.uri http://hdl.handle.net/1811/10608 dc.description Author Institution: Department of Chemistry, University of British Columbia; Laboratorio Spettroscopia, Molecolare del CNR, 40126 Bologna, Italy; Ames Laboratory, Iowa State University en_US dc.description.abstract Phase transitions have been detected in biphenyl at about $42^{\circ}\, K$ and $17^{\circ}\, K$ by noting changes in the transmitted light intensity when the crystal is placed, at extinction, between crossed polarizers and the crystal temperature slowly varied. The phase transition at $42^{\circ}\, K$ is gradual (i.e. it occurs over 3 range of temperature) while the $17^{\circ}\, K$ transition is abrupt. The effect is observed only for light propagating normal to an $a^{*} b$ section which implies that the atomic displacements at the phase transitions are largely restricted to this plane. An analogous behavior is observed for bipheny $1-d_{10}$ except that the onset of the gradual transition on cooling is $38^{\circ}\, K$ and the abrupt transition is at $24^{\circ}\,K$. Further evidence for the $17^{\circ}\, K$ phase transition has been obtained through a study of the temperature variation of the two-photon absorption origin linewidth. en_US dc.format.extent 121799 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title LOW TEMPERATURE PHASE TRANSITIONS IN BIPHENYL en_US dc.type article en_US
﻿