Light Heavy Ion Scattering Reaction: Use of High Resolution ΔE-E Gas Ionization Detector for the 10LI + 10B System

Abstract

Light Heavy Ion Scattering Reaction: Use of High Resolution ΔE-E Gas Ionization Detector for the 10LI + 10B System The major source of experimental information on nuclei structure, nuclei process mechanisms and nucleus-nucleus interaction properties are found within the ambit of Nuclear Reaction. McGrath,1999 and Jingo,2010 are of the view that “the ∆E-E technique has been proven as a powerful tool in nuclear particle identification” of which the varied set up and geometry are bound to yield new experimental result which is an urgent task in nuclear physics. The crux of this work is hinged on the identification of elements and isotopes by nuclear scattering reactions which have potentials for application in varied spheres of human endeavours. The experiment was facilitated by the Nuclear Structure Research Group (NSRG), School of Physics of the University of Witwatersrand at the iThemba LABS, Gauteng using the 6mv EN Tandem accelerator. Nuclear scattering occurs when a collision of two or more nuclear particles (projectile and target) occurs which yields ejectile and recoil nuclei in channels. Coulomb and Rutherford scattering describes elastic and inelastic scattering and the ΔE-E technique operates on energy loss, which the Bethe-Bloch equation describes; the rate of energy loss of a charged particle by ionization in a track for a given ΔE detector of thin gas ionization. The work also offers detailed experimentation processes using lithium, boron and theodolite. Results obtained show that Total Kinetic Energy loss spectra for various transfer channels when measured, puts the signal ∆E plotted against ETotal , n for High gain = 0.078, Low gain = 0.156 and from with the equation ETotal = Estop + n∆E (7) Also, the calibration of energy spectra were determined by estimating which peaks correspond to known levels at accuracy of 30- 50 KeV, with the E – detector depletion depth sufficient to stop at 16 MeV protons. In conclusion, the experiment has the potential for application in a number of areas, particularly in providing experimental information on the parameters describing the structure of nuclei, mechanism of nuclear reaction and nucleus-nucleus interaction. Also, it could validate the use of high resolution ΔE-E spectrometer technique in charged particle energy discrimination and identification of a geometric condition among other varied applications. Presented by John, Samuel Odumu Ogana