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Description:
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The dissociation of a 199Hg2 dimer prepares an entangled state of two spatially separated
199Hg atoms , each with nuclear spin 1 /2 , and with zero total electron and nuclear spin
angular momenta . This is identical to the entangled state of the two spin 1 /2 particles in
Bohm’s classic version of the EPR gedankenexperiment . An analysis of the rotational
structure of the CD=57HCI=0 band of the D3K+
u (1u )HX1Kg
+ (0+
g ) transition in Hg2 (natural
abundance ) is presented . The analysis of the fluorescence excitation spectrum using a dye
laser gives the values of the constants BCD=57 and BCI=0 for the excited and ground electronic
energy states involved in the transition , respectively . To increase the accuracy of the
rotational constants and resolve the fine spectrum of the Hg2 , a continuously tunable single
longitudinal mode laser with ultra -narrow line -width is needed . Measurements using a
narrow line -width alexandrite laser had been attempted and the values of BCD=57 and BCI=0
were determined . To improve the quality of the laser beam and hence the precision of the
rotational constants , modifications have been made to the cavity of the alexandrite laser .
This provides a possibility for further investigation . |