Accession Number : AD0262190

Title :   INVESTIGATION OF GAMMA RADIATION FROM NUCLEAR REACTIONS

Corporate Author : NOBEL INST FOR PHYSICS STOCKHOLM (SWEDEN)

Personal Author(s) : MALMFORS,K.G.

Report Date : 14 MAR 1961

Pagination or Media Count : 1

Abstract : Gamma radiati n from nuclear reactions was studied by means of a time-of-flight spectrometer (trochoid spectrometer). The spectrometer was used in connection with an 80-cm cyclotron. The reaction F-19 (proton, alpha particle) O-16 was studied. A thick target of CaF2 was bombarded with 3.5 mev protons and the resulting gamma radiation was allowed to fall upon a converter at a distance of 5 cm from the target. First an aluminum converter was used and the Compton electrons were analyzed according to the flight time in the spectrometer. Electronic equipment was later constructed which made it possible to use the instrument as a pair spectrometer. In this case a gold converter was used and the flight times of the positrons and the negatrons were recorded and combined so that a gamma spectrum could be immediately obtained on a 100-channel pulse-height analyzer. Results of such measurements are shown in fig. 5. In accordance with the well-known level scheme of O-16 three gamma lines with the energies 6.14, 6.92 and 7.12 mev are observed. These values are taken from the literature and the measurements reported should be considerered as a calibration of the spectrometer. (Author)

Descriptors :   *GAMMA RAYS, *NUCLEAR RADIATION SPECTROMETERS, INELASTIC SCATTERING, NUCLEAR PHYSICS, PROTON REACTIONS, PROTON SCATTERING, TARGETS

Distribution Statement : APPROVED FOR PUBLIC RELEASE