Alternate technique for simultaneous measurement of photoionization cross-section of isotopes by TOF mass spectrometer
Atomic and Molecular Physics Laboratory, Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan
Corresponding author: a email@example.com
Revised: 30 November 2005
Published online: 21 March 2006
New measurements of photoionization cross-sections of the lithium isotopes are reported employing a Time of Flight (TOF) mass spectrometer in conjunction with an atomic beam apparatus. Using a two-step selective photoionization and saturation technique, we have simultaneously measured the photoionization cross-section of the 2p excited state of both the isotopes Li6 and Li7 as 15±2.5 Mb and 18 ±2.5 Mb where as the corresponding number densities have been determined as N0≈5.3×1010 atoms/cm3 and N0≈6.2×1011 atoms/cm3 respectively.
PACS: 32.80.-t – Photon interactions with atoms / 32.80.Cy – Atomic scattering, cross-sections, and form factors; Compton scattering / 32.80.Dz – Autoionization
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006