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  • SPACE RADIATION  (8)
  • red mud leachability  (2)
  • water  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Beryllium in environmental air, water and soil (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 133-146 
    Details
    ISSN: 1573-2932
    Keywords: beryllium ; environment ; air ; water ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The study was specifically aimed to obtain concentration of beryllium in various environmental matrices such as air, water and soil in the vicinity of the Beryllium Metal Plant situated at Turbhe, New Bombay. Two analytical techniques - Morin fluorescence method and Atomic Absorption Spectrophotometry using graphite furnace were standardised for beryllium estimation. The beryllium concentration in the natural matrices studied - air, water and soil were in the range of 0.41–0.43 ng m−3, 0.01–0.02 ng mL−1 and 325–767 ng g−1 respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02406161
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    LEACHABILITY AND IMMOBILISATION OF BERYLLIUM FROM SOLID WASTE (RED-MUD) GENERATED IN PROCESSING BERYL (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 297-306 
    Details
    ISSN: 1573-2932
    Keywords: Beryllium ; solid waste ; red mud leachability ; immobilisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In view of the toxic nature of Beryllium and its compounds the disposal of waste materials containing beryllium needs prior evaluation. The present study was undertaken to obtain information on the leachability and immobilisation of beryllium from solid waste red-mud generated in processing Beryl at the Beryllium Metal Plant at Vashi, New Bombay. The studies showed that 62% of the total beryllium in red-mud can be extracted by water by repeated leaching over a period of 445 d. The mixing of the waste material with cement and casting into cement blocks reduced the leachability of beryllium to 0.11% which got further reduced to 0.02% by thermal curing of cement blocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026451403076
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Leachability and immobilisation of beryllium from solid waste (red-mud) generated in processing Beryl (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 297-306 
    Details
    ISSN: 1573-2932
    Keywords: Beryllium ; solid waste ; red mud leachability ; immobilisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In view of the toxic nature of Beryllium and its compounds the disposal of waste materials containing beryllium needs prior evaluation. The present study was undertaken to obtain information on the leachability and immobilisation of beryllium from solid waste red-mud generated in processing Beryl at the Beryllium Metal Plant at Vashi, New Bombay. The studies showed that 62% of the total beryllium in red-mud can be extracted by water by repeated leaching over a period of 445 d. The mixing of the waste material with cement and casting into cement blocks reduced the leachability of beryllium to 0.11 % which got further reduced to 0.02% by thermal curing of cement blocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02406065
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    BERYLLIUM IN ENVIRONMENTAL AIR, WATER AND SOIL (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 133-146 
    Details
    ISSN: 1573-2932
    Keywords: beryllium ; environment ; air ; water ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The study was specifically aimed to obtain concentration of beryllium in various environmental matrices such as air, water and soil in the vicinity of the Beryllium Metal Plant situated at Turbhe, New Bombay. Two analytical techniques – Morin fluorescence method and Atomic Absorption Spectrophotometry using graphite furnace were standardised for beryllium estimation. The beryllium concentration in the natural matrices studied – air, water and soil were in the range of 0.41–0.43 ng m-3, 0.01–0.02 ng mL-1 and 325–767 ng g-1 respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026497109129
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    Paper (German National Licenses)
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  • 5
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    Evidence of sub-millisecond structure in a gamma-ray burst (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: It is reported here that GRB910711, the gamma-ray burst (GRB) with apparently the shortest duration yet seen by the BATSE, has a time profile that shows significant submillisecond structure. The responses to this burst in the BATSE detectors show that the burst is both narrower and of higher energy than is indicated by a light curve summed over all detectors. A narrow spike of duration 200 microsec was detected in the light curve; variations on this timescale have not previously been observed in GRBs, and their explanation should be a stringent test of any GRB theory.
    Keywords: SPACE RADIATION
    Type: Nature (ISSN 0028-0836); 359; 6392; p. 217, 218.
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Pulsed emission of TeV gamma rays from Vela pulsar (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-11
    Description: The Ooty atmospheric Cerenkov array, consisting of 10 parabolic mirrors of 0.9 m diameter and 8 of 1.5 m diameter, was used for observations on the Vela pulsar to see if it emits gamma rays in the TeV energy range. During the winter of 1984-85, the array was split into two parts: (1) consisting wholly of the smaller mirrors, and (2) wholly of the bigger mirrors. The two arrays were operated at two different sites to distinguish a marginally significant genuine pulsar signal from spurious signals produced trivially by chance fluctuations in the background rates. All the mirrors were pointed at the celestial object to track it for durations of the order of 1 to 6 hours during clear moonless nights. The event time data is analyzed to detect a possible pulsed emission of TeV gamma rays using the contemporaneous pulsar elements on the basis of their radio observations on the Vela pulsar. Results from the analyses of observations made during the winters of 1982-83 and 1984-85 on steady pulsed emission and on possible transient emission is presented.
    Keywords: SPACE RADIATION
    Type: 19th Intern. Cosmic Ray Conf - Vol. 1; p 159-160; NASA-CP-2376-VOL-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Discovery of intense gamma-ray flashes of atmospheric origin (1994)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Observations have been made of a new terrestrial phenomenon: brief (approx. millisecond), intense flashes of gamma rays, observed with space-borne detectors. These flashes must originate at altitudes in the atmosphere above at least 30 km in order to be observable by orbiting detectors aboard the Compton Gamma-Ray Observatory (CGRO). At least a dozen events have been detected over the past 2 years. The photon spectra from the events are very hard and are consistent with bremsstrahlung emission from energetic (MeV) electrons. The most likely origin of these high energy electrons, while speculative at this time, is a rare type of high altitude electrical discharge above thunderstorm regions.
    Keywords: SPACE RADIATION
    Type: NASA-TM-110853 , NAS 1.15:110853
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  • 8
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    Search for gamma rays of energy 10(15) eV from Cygnus X-3 (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Finite flux of excess radiation of energy 10 to the 15th power has been reported by two groups from the direction of Cygnus X-3, with the characteristic periodicity of 4.8 hrs. Samorski and Stamm find that the muon content of the showers generated by this excess radiation is about 77% of that in normal cosmic ray showers, whereas the expectation for gamma ray showers is less than 10%. It is thus difficult to understand the nature of the radiation arriving from the direction of Cygnus X-3. Samorski and Stamm measured the muon densities close to the core (approx. 10 m), where contamination due to other components is severe. Even though this does not explain the high ratio of muon densities, measurements should be carried out away from the core to establish the nature of the radiation. In order to establish the signal from Cygnus X-3 and its muon content with better statistical significance, an extensive air shower array, specifically designed for this purpose was operated at Kolar Gold Fields (longitude: 78 deg .3 E; latitude: + 12 deg .95; atmospheric depth: 920 q/square centimeters) since September, 1984. The details of the array and the accuracy of arrival direction measurements are discussed.
    Keywords: SPACE RADIATION
    Type: OG-2.1-1 , 19th Intern. Cosmic Ray Conf - Vol. 1; p 59-61; NASA-CP-2376-VOL-1
    Format: application/pdf
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  • 9
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    Search for TeV gamma rays from extragalactic sources and the Galactic Center (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Ooty atmospheric Cerenkov array was used in 1982-83 to see if the galactic center and the extra-galactic sources 3C 273, Centaurus A emit gamma rays at TeV energies. The ON/OFF method was used wherein the source was tracked for 16 minutes and immediately afterwards, a background region in the same zenith angle range was tracked for the next 16 minutes. Data were taken for approx 15 hours (55 scans) on 3C273, approx 7 hours (26 scans) on Cen A and 5 hours (19 scans) on galactic center. A preliminary analysis involving direct comparison of total rates on and off the source shows no significant excess from any of these orbits. Results of detailed analysis using different energy thresholds are presented.
    Keywords: SPACE RADIATION
    Type: OG-2.7-1 , NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 1; p 263
    Format: application/pdf
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  • 10
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    Observations on TeV gamma rays from Geminga and PSR 0950+08 (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Geminga (2 CG 195+04) which exhibits a periodicity with a period of 59 to 60 s in its emission of X-rays, GeV gamma rays and TeV gamma rays was studied. During the winter of 1984 to 1985, this object was observed to see if it emits TeV gamma rays with a periodicity approx 60 s. The observations were carried out at two different sites separated by 11 Km with the Ooty Atmospheric Cerenkov Array split into two parts. Data were collected during clear moonless nights for a total duration of 15.3 hours spread over 2 months. Since the first time derivative of period is believed to be large and uncertain. The total data are subdivided into segments of duration not more than 3 days each to steer clear of the effects of P in the phase analysis. If TeV gamma ray signals are seen in each of these segments, it is possible to derive P from observed data.
    Keywords: SPACE RADIATION
    Type: OG-2.4-6 , 19th Intern. Cosmic Ray Conf - Vol. 1; p 181-182; NASA-CP-2376-VOL-1
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