Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/9595
Title: Charge spectrum of ultra heavy cosmic ray ions (<i>Z</i>=68-96) measured onboard long duration exposure facility
Authors: Batra, V
Dutta, A
Biswas, S
Keywords: Ultra heavy nuclei
Galactic cosmic rays-abundance
Nucleosynthesis
Anomalons
Issue Date: Jul-2004
Publisher: CSIR
Series/Report no.: G01T 1/00
Abstract: The results of the abundance of relativistic ultra heavy (UH) nuclei with charge <i>Z</i> > 65 from an analysis of detectors exposed in space by Ultra Heavy Cosmic Ray Experiment (UHCRE) conducted onboard NASA's Long Duration Exposure Facility (LDEF) are presented. A total of 72 events including two actinides (88 ≤ <i>Z </i>≤ 100) have been identified from the scanning of ~0.21m<sup>2</sup> detector area. A peak at <i>Z </i>= 78 and a smaller peak around <i>Z </i>= 85 could be seen. The charge fragmentation of the cosmic ray ions has also been seen within the detector stack.<sup> </sup>The detailed analysis of charge spectrum for the elements in the charge region, <i>Z</i> = 65-96, is presented. An enhancement of r-process elements relative to solar system is observed. The results suggest a mixed source of rapid (r) and slow (s) process nuclei with <i>Z</i> > 65 for cosmic rays in space.
Description: 479-484
URI: http://hdl.handle.net/123456789/9595
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.42(07) [July 2004]

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