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Kumar P.,Metal Vapour and Dye Laser Application Laboratory | Saini V.K.,Metal Vapour and Dye Laser Application Laboratory | Purbia G.S.,Metal Vapour and Dye Laser Application Laboratory | Prakash O.,Metal Vapour and Dye Laser Application Laboratory | And 2 more authors.
Advanced Science Letters | Year: 2015

In the present study, Doppler free saturation absorption spectroscopy (SAS) of lithium at ∼671 nm has been carried out in in-house developed hollow cathode lamp to study hyperfine structure splitting. This is the first study on SAS of lithium in hollow cathode discharge based atomic vapour source. A CW ring dye laser of line-width <10 MHz is used to excite and probe the transitions. Four hyperfine components of 7Li D1 and D2 lines and two hyperfine components of 6Li D1 line are clearly resolved. The observed hyperfine splitting of ground state ‘2S1/2’ is 800±10 MHz for 7Li (D1 and D2, and 227±10 MHz for 6Li (D1). Isotopic shift for D1 lines of 6,7Li is also calculated. The observed isotopic shift between 6Li and 7Li is about 10540±12 MHz for D1 line. © 2015 American Scientific Publishers. All rights reserved. Source

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