Abstract
The observation of trans-iron nuclei in galactic cosmic rays (Z 30) requires a high performance cosmic ray detector telescope with a very large exposure area because of their extremely low fluxes. It is realized by the use of solid-state track detector of CR-39, which has an advantage of easy extension of exposure area. The verification of mass and nuclear charge identifications with the CR-39 detector newly developed for the observation of heavy cosmic ray particles has been made using Fe ions from NIRS-HIMAC. Mass and charge resolutions for Fe nuclei are found to be 0.22 amu and 0.22 cu in rms, respectively. Moreover, it is necessary to raise the Z/detection threshold in order to suppress background tracks produced by galactic cosmic rays with Z/<30. The new track detectors of copolymers of CR-39 and DAP (diallyl phthalate) have been developed and verified as for their performances. It was found that the newly CR-39 detector has a capability to observe trans-iron nuclei in galactic cosmic rays.
| Original language | English |
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| Title of host publication | Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 |
| Publisher | Universidad Nacional Autonoma de Mexico |
| Pages | 425-428 |
| Number of pages | 4 |
| Volume | 2 |
| Edition | OG PART 1 |
| Publication status | Published - 2007 |
| Event | 30th International Cosmic Ray Conference, ICRC 2007 - Merida, Yucatan, Mexico Duration: 2007 Jul 3 → 2007 Jul 11 |
Other
| Other | 30th International Cosmic Ray Conference, ICRC 2007 |
|---|---|
| Country/Territory | Mexico |
| City | Merida, Yucatan |
| Period | 07/7/3 → 07/7/11 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics