Fragmentation studies of relativistic iron ions using plastic nuclear track detectors.
Adv Space Res
; 35(2): 230-5, 2005.
Article
in En
| MEDLINE
| ID: mdl-15934199
ABSTRACT
We measured fluence and fragmentation of high-energy (1 or 5 A GeV) 56Fe ions accelerated at the Alternating Gradient Synchrotron or at the NASA Space Radiation Laboratory (Brookhaven National Laboratory, NY, USA) using solid-state CR-39 nuclear track detectors. Different targets (polyethylene, PMMA, C, Al, Pb) were used to produce a large spectrum of charged fragments. CR-39 plastics were exposed both in front and behind the shielding block (thickness ranging from 5 to 30 g/cm2) at a normal incidence and low fluence. The radiation dose deposited by surviving Fe ions and charged fragments was measured behind the shield using an ionization chamber. The distribution of the measured track size was exploited to distinguish the primary 56Fe ions tracks from the lighter fragments. Measurements of projectile's fluence in front of the shield were used to determine the dose per incident particle behind the block. Simultaneous measurements of primary 56Fe ion tracks in front and behind the shield were used to evaluate the fraction of surviving iron projectiles and the total charge-changing fragmentation cross-section. These physical measurements will be used to characterize the beam used in parallel biological experiments.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radiation Protection
/
Radiation Monitoring
/
Heavy Ions
/
Iron
Language:
En
Journal:
Adv Space Res
Journal subject:
MEDICINA AEROESPACIAL
Year:
2005
Document type:
Article
Affiliation country: