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  • SPACE RADIATION  (11)
  • 07.75.+h  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Production and identification of new neutron-rich fragments from 33 MeV/u86Kr beam in the 18≦Z≦27 region (1985)
    Springer
    The European physical journal 322 (1985), S. 415-418 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.−k ; 07.75.+h
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The new nuclei47Ar,57Ti,59,60V,61,62Cr,64,65Mn,66,67,68Fe,68,69,70Co haye been produced by fragmentation of a86Kr beam and identified through time of flight andΔE×E measurements. The tentative observation of56Ti,57,58V,60Cr and65Fe by other groups is confirmed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01412075
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Total cross sections of reactions induced by neutron-rich light nuclei (1989)
    Springer
    The European physical journal 332 (1989), S. 457-465 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.-k ; 07.75.+h ; 21.10.Gv ; 25.70.Np ; 27.20.+n
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Total nuclear reaction cross-sections are determined by means of a 4π-γ method. The results cover a wide span of targets for various stable beams. The validity of the method is shown in a combined systematics including also the results of transmission-type experiments. The data are very well described by the formula developed by Kox et al. The same method is applied to secondary fragment beams produced from a 44 MeV/u22Ne beam on a 332mg/cm2 181Ta target. Using the LISE spectrometer the fragments4, 6He,6–9, 11Li,7, 9–12, 14Be,10–15, 17B11–19C,13–19N,15–21O,18– 21F and20,21 Ne are analyzed and transported to interact with a 199.4 mg/cm2 Cu target surrounded by a 4π-γ counter. The measured total reaction cross-sectionsσ R are discussed in terms of the reduced strong absorption radiusr 0 and compared with other experimental results.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01292431
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  • 3
    facet.materialart.
    Unbekannt
    The development of a high energy cosmic ray detector for Spacelab-2 (1985)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: A large cosmic ray detector aimed at measurements of the energy spectra and of the elemental abundances of cosmic ray nuclei at very high energies, up to several TeV/nucleon was constructed. The instrument is an electronic counter telescope with a geometric factor of 5 sq ster. It accomplishes measurements of the particle energies through the use of gas Cerenkov counters and of transition radiation detectors. The solutions of a number of technological problems that are encountered when developing such instrumentation for Shuttle missions are discussed.
    Schlagwort(e): SPACE RADIATION
    Materialart: OG-9.1-8 , 19th Intern. Cosmic Ray Conf - Vol. 3; p 276-277; NASA-CP-2376-VOL-3
    Format: application/pdf
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  • 4
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    An observation of cosmic ray positrons from 10-20 GeV (1985)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: A balloon flight of the University of Chicago electron telescope was performed. Making use of the east-west asymmetry in the geomagnetic cut off rigidity, the cosmic ray positrons and negatrons were separated over the range 10 GeV to 20 GeV. The positron to electron ratio, e+/(e++e-), was measured to be 17% + or - 5%, significantly higher than the ratio measured in the 1 GeV to 10 GeV range by other experiments. This increase appears to suggest that either a primary component of positrons become significant above 10 GeV, or that the spectrum of primary negatrons decreases above 10 GeV more sharply than that of secondary positrons.
    Schlagwort(e): SPACE RADIATION
    Materialart: OG-6.2-6 , 19th Intern. Cosmic Ray Conf - Vol. 2; p 378-381; NASA-CP-2376-VOL-2
    Format: application/pdf
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  • 5
    facet.materialart.
    Unbekannt
    High-energy cosmic-ray electrons - A new measurement using transition-radiation detectors (1977)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A new detector for cosmic-ray electrons, consisting of a combination of a transition-radiation detector and a shower detector, has been constructed, calibrated at accelerator beams, and exposed in a balloon flight under 5 g/sq cm of atmosphere. The design of this instrument and the methods of data analysis are described. Preliminary results in the energy range 9-300 GeV are presented. The energy spectrum of electrons is found to be significantly steeper than that of protons, consistent with a long escape lifetime of cosmic rays in the galaxy.
    Schlagwort(e): SPACE RADIATION
    Materialart: Physical Review Letters; 38; June 6
    Format: text
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  • 6
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    Composition of cosmic-ray nuclei at high energies. (1972)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: We have measured the charge composition of cosmic-ray nuclei from Li to Fe with energies up to about 100 GeV/nucleon. A balloon-borne counter telescope with gas Cherenkov counters for energy determination was used for this experiment. Our first results show that, in contrast to low-energy observations, the relative abundances change as a function of energy. We find that the ratio of the galactic secondary nuclei to primary-source nuclei decreases at energies above about 30 GeV/nucleon.
    Schlagwort(e): SPACE RADIATION
    Materialart: Physical Review Letters; 29; Aug. 14
    Format: text
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  • 7
    facet.materialart.
    Unbekannt
    The spectrum of galactic electrons with energies between 10 and 900 GeV (1973)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A cosmic-ray electron detector has been exposed during 1970 in three high-altitude balloon flights from Palestine, Texas. The data analysis is based on results from accelerator calibrations with electrons and pions at SLAC. Discrimination against a contamination of the electron data due to interacting protons has been achieved by statistical methods. The resulting differential energy spectrum of cosmic-ray electrons can be well described by a single power law with spectral index 2.66 plus or minus 0.1 up to energies around 250 GeV. Within the experimental uncertainty, no change in this spectral slope up to almost 1000 GeV can be detected. Some implications of these results are discussed.
    Schlagwort(e): SPACE RADIATION
    Materialart: Astrophysical Journal; 186; Dec. 15
    Format: text
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  • 8
    facet.materialart.
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    Further measurements of high energy cosmic ray electrons (1982)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: The University of Chicago balloon telescope for cosmic ray electrons has been substantially modified and improved, and has been exposed in another successful balloon flight in 1980. Preliminary results from this flight, over the energy range 5 to 200 GeV, are presented. Data indicate an electron flux of 0.27 plus or minus 0.04/(sq m sec sr GeV) at 10 GeV, and a spectral shape consistent with a power law E to the -3.0 power at low energies, but steepening further, probably due to radiative energy losses, with increasing energy.
    Schlagwort(e): SPACE RADIATION
    Materialart: International Cosmic Ray Conference; Jul 13, 1981 - Jul 25, 1981; Paris; France
    Format: text
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  • 9
    facet.materialart.
    Unbekannt
    Elemental composition of cosmic rays and cosmic ray electrons (1978)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: A summary of 40 papers on the elemental composition of cosmic rays and cosmic ray electrons is presented. Attention is given to experimental results concerning the 'anomalous component' of low energy cosmic radiation, the composition of ultraheavy cosmic rays, the energy dependence of cosmic ray composition at high energies (between 1 and 100 GeV/nucleon), and the energy spectrum of high-energy electrons.
    Schlagwort(e): SPACE RADIATION
    Materialart: International Cosmic Ray Conference; Aug 13, 1977 - Aug 26, 1977; Plovdiv; Bulgaria
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 10
    facet.materialart.
    Unbekannt
    Cosmic ray electrons - A discussion of recent observations (1978)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: A recent measurement of the spectrum of cosmic-ray electrons has provided statistically significant evidence for a spectral shape that is much steeper than that of protons. The electron spectrum does not fit well to a single power law, and the abundance of electrons relative to that of protons decreases from approximately 1% at 10 GeV to approximately 0.1% at 300 GeV. This result is consistent with a galactic escape lifetime for electrons exceeding 10 million years. The data are discussed in light of current models for the propagation of cosmic rays in the Galaxy, and conclusions are drawn concerning the consistency of various models with the observations.
    Schlagwort(e): SPACE RADIATION
    Materialart: International Cosmic Ray Conference; Aug 13, 1977 - Aug 26, 1977; Plovdiv; Bulgaria
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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