Accession Number : AD0674879

Title :   CROSS SECTIONS FOR THE 16O(GAMMA, 2N), 19F(GAMMA, 2PN), 27AL(GAMMA, 2PN), 51V(GAMMA, ALPHA), AND 51V(GAMMA, ALPHA3N) REACTIONS TO 300 MEV,

Corporate Author : ILLINOIS UNIV URBANA

Personal Author(s) : Meyer,Richard A. ; Walters,William B. ; Hummel,John P.

Report Date : 1968

Pagination or Media Count : 47

Abstract : Yield and cross section results were obtained for some photonuclear reactions in 16O, 19F, 27Al, and 51V targets by measuring the radioactivities of the product nuclei in samples that had been irradiated with bremsstrahlung in the 20 to 300-MeV energy range. The reactions studied were the 16O(Gamma, 2n), 19F(Gamma, 2pn), 27Al(Gamma, 2pn), 51V(Gamma, alpha), and 51V(Gamma, alpha3n) reactions. The cross sections at energies above 150 MeV were interpreted in terms of the contributions from various reaction mechanisms. The reactions in O, F, and Al generally have important contributions from both quasi-deuteron and pion emission processes. In the 51V reactions, an additional mechanism, pion reabsorption, also makes important contributions. The reaction cross sections at energies below 150 MeV are used to determine the total cross sections for photon absorption at energies above the giant resonance region and below 150 MeV. The resulting total cross sections are generally consistent with those determined from neutron counting experiments. (Author)

Descriptors :   (*PHOTONUCLEAR REACTIONS, *NUCLEAR CROSS SECTIONS), OXYGEN, FLUORINE, ALUMINUM, VANADIUM, NEUTRONS, PROTONS, ALPHA PARTICLES, EMISSIVITY, NUCLEAR RESONANCE, DEUTERONS, PIONS, DECAY SCHEMES

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE