|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.42 [2004] >
IJPAP Vol.42(07) [July 2004] >
| Title: | Charge spectrum of ultra heavy cosmic ray ions (Z=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 |
| IPC Code: | G01T 1/00 |
| Abstract: | The results of the abundance of relativistic ultra heavy (UH)
nuclei with charge Z > 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 ≤ Z ≤ 100) have been identified from the scanning of ~0.21m2
detector area. A peak at Z = 78 and a smaller peak around Z = 85
could be seen. The charge fragmentation of the cosmic ray ions has also been
seen within the detector stack. The detailed analysis of charge
spectrum for the elements in the charge region, Z = 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 Z
> 65 for cosmic rays in space. |
| Page(s): | 479-484 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.42(07) [July 2004]
|
|
