Idioma:

Energy spectra and angular distribution of photoneutrons from oxygen

Milone, C. ; Rubbino, A.

Nuovo cimento, 1959-09, Vol.13 (5), p.1035-1052

Texto completo disponível

Citações Citado por

Enviar para

Título:
Energy spectra and angular distribution of photoneutrons from oxygen
Autor: Milone, C. ; Rubbino, A.
Assuntos: ANGULAR DISTRIBUTION- GIANT RESONANCE- MEASURED VALUES- OXYGEN 16- PHOTONEUTRONS- RESONANCE ; ATOMIC MODELS- ENERGY- FINE STRUCTURE- HYPERFINE STRUCTURE- MEASURED VALUES- OXYGEN 16- PHOTONEUTRONS- SPECTRA ; BEAMS- BREMSSTRAHLUNG- ENERGY RANGE- GAMMA RADIATION- IRRADIATION- MEASURED VALUES- OXYGEN 16- PHOTONEUTRONS- TARGETS- WATER ; CROSS SECTIONS- GAMMA RADIATION- MEASURED VALUES- NUCLEAR REACTIONS- OXYGEN 16- PHOTONEUTRONS- PHOTOPRODUCTION- PROTONS ; ELECTRIC CHARGES- ENERGY LEVELS- GIANT RESONANCE- MEASURED VALUES- NUCLEAR MODELS- OXYGEN 16- PHOTONEUTRONS- RESONANCE ; ENERGY LEVELS- MEASURED VALUES- OXYGEN 16 ; PHYSICS
É parte de: Nuovo cimento, 1959-09, Vol.13 (5), p.1035-1052
Notas: USDOE
Descrição: Energy spectra and angular distribution of photoneutrons from oxygen are investigated by irradiation of a water target with a collimated 31 Mev bremsstrahlung beam. Photoneutrons emitted at THETA angles of 30 deg , 60 deg , 90 deg , 120 deg , and 150 deg with a gamma -ray beam are recorded by means of proton recoil tracks in Ilford L-4400 mu m thick photoemulsions. The neutron spectra analysed in 0.5 Mev steps show a fine structure in good agreement with the fine structure found in the proton spectra and in the ( gamma ,n) and ( gamma ,p) cross sections. From these structures many levels of the O/sup 16/ nucleus are identified which are in good agreement with known levels and some levels given with uncertainty are confirmed. For the O/sup 16/( gamma ,n) reaction the contribution of direct process appears prevalent while for all elements up to this date investigated evaporation accounts for the greater part of emitted neutrons. The ground state transitrons amount to at least 60% of the emitted neutrons. The angular distribution of photoneutrons is analyzed separately for single neutron peaks and a back and front asymmetry is found in the region of the giant resonance. Results on the O/sup 16/( gamma ,n) process up to 31 Mev can be interpreted, in good approximation, in terms of a many-level theory for the giant resonance, single-particle transitions and charge independence of nuclear forces.
Idioma: Inglês

Links

View this record in Osti.gov

Voltar para lista de resultados

Resultado 1 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

Energy spectra and angular distribution of photoneutrons from oxygen

Milone, C. ; Rubbino, A.

Buscando em bases de dados remotas. Favor aguardar.