Affiliation: | (1) Department of Physics, Sree Sevugan Annamalai College, Devakottai, 630 303, Tamil Nadu, India;(2) Department of Physics, Ananda College, Devakottai, 630 303, Tamil Nadu, India;(3) Department of Chemistry, Sree Sevugan Annamalai College, Devakottai, 630 303, Tamil Nadu, India;(4) School of Physics, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India;(5) Department of Physics, Kalasalingam University, Krishnankoil, 626 190, Tamil Nadu, India |