, 90:47 | Cite as

Development of a collinear laser spectrometer facility at VECC: First test result

  • Md Sabir Ali
  • Ayan Ray
  • Waseem Raja
  • Arup Bandyopadhyay
  • Vaishali Naik
  • Asish Polley
  • Alok Chakrabarti


We report here the development of collinear laser spectroscopy (CLS) system at VECC for the study of hyperfine spectrum and isotopic shift of stable and unstable isotopes. The facility is first of its kind in the country allowing measurement of hyperfine splitting of atomic levels using atomic beams. The CLS system is installed downstream of the focal plane of the existing isotope separator online (ISOL) facility at VECC and is recently commissioned by successfully resolving the fluorescence spectrum of the hyperfine levels in \(^{85,87}\)Rb. The atomic beams of Rb were produced by charge exchange of 8 keV Rb ion beam which were produced, extracted and transported to the charge exchange cell using the ion sources, extractor and the beam-line magnets of the ISOL facility. The laser propagating opposite to the ion / atom beam direction was allowed to interact with the atom beam and fluorescence spectrum was recorded. The experimental set-up and the experiment conducted are reported in detail. The measures needed to be carried out for improving the sensitivity to a level necessary for studying short-lived exotic nuclei have also been discussed.


Collinear laser spectrometer isotope separator online charge exchange ellipsoid reflector photon counting 


21.10.−K 27.50.+e 42.62.Fi 


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Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  • Md Sabir Ali
    • 1
  • Ayan Ray
    • 1
  • Waseem Raja
    • 2
  • Arup Bandyopadhyay
    • 3
  • Vaishali Naik
    • 1
  • Asish Polley
    • 3
  • Alok Chakrabarti
    • 1
  1. 1.Radioactive Ion Beam GroupVariable Energy Cyclotron CentreKolkataIndia
  2. 2.Department of PhysicsUniversity of KashmirSrinagarIndia
  3. 3.Accelerator Physics GroupVariable Energy Cyclotron CentreKolkataIndia

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