Dr. Vass - LIBS - lasar induced breakdown spectroscopy....non-destructive techniques...don't destroy carpet.....libs works uses .....witness not a physist object ovrrule
LIBS - laser based technique -laser beam YAG creates green light.....(going to fast - get excited when he knows something Dr. V apologises)
cyrstal matrix- YAG yitrium aluminum garnet
laser directed onto carpet - elements composed of atoms, neutron,electrons, ground state or excited state....laser creates excited state...laser shut off - electrons fall back back down to ground state and emit energy (object-out of area expert -overrule)
laser is turned off fall to ground state...energy produced during excitation released as photon of light picked up by fiber optic - spectrotometer to detect ...every element has characteristic light signature...
technique used on carpet ....not present when occurred .....used this data for eventual report....significance results of LIB.....organic and inorganic components....inorganic liberate when decomp occurs...elevated inorganic decomp event....calcium,soduium etc...non-destructive test to see if elements were in this sample as well as control sample.....
(difficult to hear JA away from mike)
object - outside area expertise - want to voir dire witness pertain to this item......may proceed.....HHBP - as to particular item..
JB - not a physisict....Dr. Modave Martin conducted this exam in charge of LIBS laser -- you are not allowed to touch it? (object sustained
have you ever utilized this instrument -
I have used lasers and laser qualified....I know procedure well established
JB -- you were not present - correct
everyone is standing -- must have pop tarted the jurors!