The use of a pulsed Van de Graaff accelerator and time-of-flight techniques to reduce backgrounds in (α,γ) spectroscopy experiments


Journal Article

A pulsed beam of alpha particles from a 5.5 MV Van de Graaff accelerator has been used to study radiative capture reactions. Time-of-flight techniques are used to discriminate against neutrons produced when the beam interacts with collimator-target contaminants, as well as against beam independent background due to cosmic rays. With a beam pulse of less than 4 nsec (FWHM) duration and a repetition rate of 2 MHz, a portion of the 34S(α,γ) 38Ar excitation function was examined near Eα=3.6 MeV and the background found to be an approximate factor of 15 below that of the effective dc excitation function. In addition it is demonstrated that an angular distribution taken on resonance by this method requires substantially less background subtraction. The method has also been successfully applied to radiative capture studies in which the incident beam energy is above the neutron threshold for the target nuclei. © 1971 The American Institute of Physics.

Full Text

Duke Authors

Cited Authors

  • Jaszczak, RJ; MacKlin, RL; Dunnam, FE; Van Rinsvelt, HA; Bloomer, RH

Published Date

  • December 1, 1971

Published In

Volume / Issue

  • 42 / 1

Start / End Page

  • 44 - 48

International Standard Serial Number (ISSN)

  • 0034-6748

Digital Object Identifier (DOI)

  • 10.1063/1.1684874

Citation Source

  • Scopus