#
# arev:/usr/local/unicat/unireq/beamreq/req00091.txt
# UNICAT Member Beam Time Request  #91

# created Fri Dec 03 14:51:06 CST 1999
#

collaboration:
	No

days:
	6

description:
	     Further data to be taken on the CDW transition in TiSe2.  We will
	again observe the phonon softening effect on the transverse acoustic
	phonon mode of TiSe2 along A-L ([0,0,1/2] - [1/2,0,1/2]) via line
	scans over several L points and temperatures not recorded in the previous
	experiment.
	     A comparison of first order TDS scattering at L points that are
	highly forbidden to the TA mode (q perpendicular to polarization), and
	highly allowed (q colinear to polarization), should unambiguously detect
	this mode's phase transition over many temperatures.
	

equipment+required:
	High resolution diffractometer, displex

experiment:
	CDW Phase Transitions in TiSe2

hazards:
	    No special procedures needed.  All samples are in solid form and
	are stable in air.  Do not ingest or inhale.
	 

name:
	T.-C. Chiang

new+request:
	on

nonmembers:
	

station:
	33ID-D

unacceptable+dates:
	Mar 20-24 APS march meeting



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