Energetic carbon, nitrogen, and oxygen nuclei in the earth's outer radiation zone
Geomagnetically trapped C, N and O nuclei and alpha particles in earth outer radiation zone, noting acceleration and loss mechanisms
Krimigis, S. M.↗
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Identification and relative abundances of C, N, and O nuclei trapped in the geomagnetic field
C, N and O nuclei abundances in radiation belt near geometric equator, using data obtained by OGO-5 satellite in 1968
Mogro-Campero, A.↗
Solar modulation of cosmic ray protons, helium nuclei, and electrons - A comparison of experiment with theory
Galactic cosmic ray proton and He nuclei spectra measurements aboard Pioneer 8 spacecraft over large energy range, considering solar modulation parameters
Lezniak, J. A.↗
Intensities of low-energy cosmic-ray H 2 and He 3 nuclei measured in 1967-1968
Low energy cosmic ray H 2 and He 3 nuclei intensities /1967-1968/ from Pioneer 8 and IMP 4 measurements
Baity, W. H.↗
Charged particle emission following pion capture in nuclei
Negative pion capture in nuclei, examining charged particle emission energy spectra
Castleberry, P. J.↗
Enhanced emission of iron nuclei in solar flares
Iron nuclei emission during 1967-1969 solar flares from spacecraft window and lunar camera lens etched tracks, discussing Fe/He ratio and lunar soil densities
Barber, D. J.↗
The acceleration and propagation of solar cosmic rays as deduced from the relative abundance of protons to helium nuclei
Solar cosmic ray acceleration and propagation from time variation and heliocentric distance dependence of relative abundance of protons to helium nuclei
Sakurai, K.↗
Statistical study of solar protons, alpha particles, and nuclei of atomic number not less than 3 in 1967-1968
Statistical measurements of solar protons, alpha particles and heavier nuclei by lunar orbiting Explorer 35
Armstrong, T. P.↗
Deformed Brueckner-Hartree-Fock calculation for light nuclei
For the first time the Brueckner-Hartree-Fock (BHF) method was applied to nuclei whose intrinsic structure is nonspherical. One aim was to investigate whether the energy dependent reaction matrix calculated from a realistic nucleon-nucleon interaction leads to deformations similar to, or different from, those obtained from energy independent interactions in Hartree-Fock (HF) calculations. Reaction matrix elements were calculated as a function of starting energy for the Hamada-Johnston interaction, using a Pauli operator appropriate to O-16 and a shifted oscillator spectrum for virtual excited states. Binding energies, single-particle energies, radii, and shape deformations of the intrinsic state in unrenormalized as well as renormalized BHF are discussed and compared with previous HF studies. Results are presented for C-12, O-16, and Ne-20.
Braley, R. C.↗
A computer code for predicting gamma production cross sections by neutron inelastic scattering from light nuclei
Gamma-ray production cross section by the inelastic scattering of neutrons from light nuclei are considered. The applicability of optical model potential is discussed. Based on experimental data, a cascade approach is developed to calculate the inelastic gamma production cross sections. In the case of O-16 using computer code LINGAP in conjunction with ABACUS-2; results are compared with reported values.
George, M. C.↗
Measurements of the charge and isotope composition of cosmic ray Li, Be and B nuclei.
Cosmic ray Li, Be, and B nuclei have been measured using two new detectors, a large-area dE dx-E-Range telescope and a dE dx-Cerenkov-Range telescope. The L/M ratio is found to be 0.23 plus or minus 0.01, essentially constant with energy between 100 MeV/nuc to more than 2 BeV/nuc. Other findings are presented and discussed.
Webber, W. R.↗
Enrichment of very heavy nuclei in the composition of solar accelerated particles.
Measurement of the abundances of the nuclei C, N, O, Ne, Mg, Si, Ar, and Ca and the group Cr-Co relative to oxygen from seven solar energetic-particle events in the energy range from about 14 to 61 MeV per nucleon with a solid-state detector telescope on the OGO-5 satellite, 1968-1971. The differential energy spectra of O (14 to 29 MeV per nucleon) and Cr-Co (3 to 61 MeV per nucleon) have a spectral index of about (-3) for a power law in kinetic energy. The relative abundances of C, N, O, and Ne are in excellent agreement with emulsion studies. However, when compared with the solar photospheric and coronal abundances, the OGO-5 measurements show a large enhancement of relative abundances beginning with Si, and extending to the Cr-Co group. The enhancement over the solar and universal abundances is in rough agreement with the composition of the galactic cosmic radiation.
Mogro-Campero, A.↗
Spectral energy distributions of nuclei of peculiar galaxies.
Consideration of galaxies of the types described by Seyfert, Zwicky, Markarian and others. Quasars are discussed in terms of their similarities to the nuclei of peculiar galaxies. The data discussed were obtained almost exclusively with photoelectric spectrometers. Peculiar galaxies have a wide range of properties insofar as their spectra are concerned. Many have very strong emission lines. Sources of continuous radiation, and distance scale problems and selection effects are discussed. Data are presented which are representative of spectrophotometric observational results for 12 Markarian galaxies, 14 Zwicky compact objects, and 16 radio galaxies. The general properties of spectral energy distributions of peculiar galaxies and quasars are discussed.
Oke, J. B.↗
Rapid evolution of galactic nuclei.
An evolutionary sequence is suggested for Virgo cluster galaxies, in a radial velocity-nuclear magnitude diagram. This evolution, on a time scale of about 100 m.y., is discussed in terms of the morphology and radial color variations of the galaxies, nuclear size and radio emission. An area scan and profiles of nuclei, obtained with image dissector equipment, are presented.
Tifft, W. G.↗
Superconducting magnetic spectrometer for cosmic ray nuclei.
This paper describes the design, calibration, and operation of a magnetic spectrometer for particle astronomy. The spectrometer consists of a superconducting magnet, optical spark chambers, scintillation detectors, and associated electronics. The instrument has been flown in a balloon gondola to 4.8 g/sq cm residual atmosphere, where it was used to analyze the charge and differential rigidity spectra of primary nuclei from 5 to 100 GeV/c.
Smith, L. H.↗
Fragmentation of N-14 nuclei at 29 GeV - Inclusive isotope spectra at 0 deg.
We report the first results of a Bevatron heavy-ion experiment on the inclusive spectra of isotopically identified nuclei 3(Z-range between 3 and 7), produced by the fragmentation of 29-GeV N-14 ions in carbon and hydrogen. The preliminary values of the partial differential cross sections at 0 deg give evidence that the modes of fragmentation of N-14 projectiles are independent of the target nucleus.
Heckman, H. H.↗
Search for optical circular polarization in quasars and Seyfert nuclei.
A search for optical circular polarization has been made in six quasars, the nuclei of three Seyfert galaxies, BL Lac, and OJ 287. No positive effect was found in any of these objects, several of which have been reported to show circular polarization at radio wavelengths. It thus appears that optical circular polarization in quasars, if there is any, is not as strong as at radio wavelengths, and in the best-measured objects it is definitely less than 0.2%.
Landstreet, J. D.↗
Nonelastic interactions of nucleons and pi mesons with complex nuclei at energies below 3 GeV.
Calculation of nonelastic interactions corresponding to continuum-state transitions using the intranuclear-cascade evaporation approach. Spallation yields, energy- and angle-dependent spectra, particle multiplicities, and nonelastic cross sections are calculated for incident nucleons and pi mesons with energies below 3 GeV on complex nuclei. Comparisons with experimental data are made, and, in general, the agreement is good. Discrepancies in these comparisons are discussed with respect to the deficiencies in the model.
Bertini, H. W.↗