Measurements of nuclear {gamma}-ray line emission in interactions of protons and {alpha} particles with N, O, Ne, and Si

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.024603· OSTI ID:21499420

Benhabiles-Mezhoud, H; Kiener, J; Thibaud, J -P; Tatischeff, V; Deloncle, I; Coc, A; Duprat, J; Hamadache, C; Lefebvre-Schuhl, A; Dalouzy, J -C; Grancey, F de; Oliveira, F de; Dayras, F; Sereville, N de; Pellegriti, M -G; Lamia, L; Ouichaoui, S ^[1]

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1. Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse (CSNSM), CNRS-IN2P3 et Universite Paris-Sud, 91405 Orsay Campus (France)

{gamma}-ray production cross sections have been measured in proton irradiations of N, Ne, and Si and {alpha}-particle irradiations of N and Ne. In the same experiment we extracted also line shapes for strong {gamma}-ray lines of {sup 16}O produced in proton and {alpha}-particle irradiations of O. For the measurements gas targets were used for N, O, and Ne and a thick foil for Si. All targets were of natural isotopic composition. Beams in the energy range up to 26 MeV for protons and 39 MeV for {alpha} particles were delivered by the Institut de Physique Nucleaire-Orsay tandem accelerator. The {gamma} rays were detected with four high-purity Ge detectors in the angular range 30 deg. to 135 deg. We extracted 36 cross-section excitation functions for proton reactions and 14 for {alpha}-particle reactions. For the majority of the excitation functions no other data exist to our knowledge. Where comparison with existing data was possible, usually a very good agreement was found. It is shown that these data are very interesting for constraining nuclear reaction models. In particular, the agreement of cross section calculations in the nuclear reaction code talys with the measured data could be improved by adjusting the coupling schemes of collective levels in the target nuclei {sup 14}N, {sup 20,22}Ne, and {sup 28}Si. The importance of these results for the modeling of nuclear {gamma}-ray line emission in astrophysical sites is discussed.

• OSTI ID: 21499420
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevC.83.024603; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
COUPLING
EMISSION
EXCITATION FUNCTIONS
FOILS
GAMMA RADIATION
HIGH-PURITY GE DETECTORS
ION-ATOM COLLISIONS
ISOTOPE RATIO
MEV RANGE 10-100
NEON 20
NEON 22
NITROGEN 14
ORSAY TANDEM ACCELERATOR
OXYGEN 16
PROTON REACTIONS
PROTONS
SILICON 28
SIMULATION
ACCELERATORS
ATOM COLLISIONS
BARYON REACTIONS
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DIMENSIONLESS NUMBERS
ELECTROMAGNETIC RADIATION
ELECTROSTATIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
FUNCTIONS
GE SEMICONDUCTOR DETECTORS
HADRON REACTIONS
HADRONS
ION COLLISIONS
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MEV RANGE
NEON ISOTOPES
NITROGEN ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-ODD NUCLEI
OXYGEN ISOTOPES
RADIATION DETECTORS
RADIATIONS
SEMICONDUCTOR DETECTORS
SILICON ISOTOPES
STABLE ISOTOPES
TANDEM ELECTROSTATIC ACCELERATORS
VAN DE GRAAFF ACCELERATORS