Fragmentation Cross Sections of 290 and 400 MeV/nucleon 12C Beamson Elemental Targets

Journal Article · Sat Mar 17 04:00:00 EDT 2007 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.76.014911· OSTI ID:929312

Zeitlin, C; Guetersloh, S; Heilbronn, L; Miller, J; Fukumura, A; Iwata, Y; Murakami, T

Charge-changing and fragment production cross sections at 0circ have been obtained for interactions of 290 MeV/nucleon and 400MeV/nucleon carbon beams with C, CH2, Al, Cu, Sn, and Pb targets. Thesebeams are relevant to cancer therapy, space radiation, and the productionof radioactive beams. We compare to previously published results using Cand CH2 targets at similar beam energies. Due to ambiguities arising fromthe presence of multiple fragments on many events, previous publicationshave reported only cross sections for B and Be fragments. In this work wehave extracted cross sections for all fragment species, using dataobtained at three distinct values of angular acceptance, supplemented bydata taken with the detector stack placed off the beam axis. A simulationof the experiment with the PHITS Monte Carlo code shows fair agreementwith the data obtained with the large acceptance detectors, but agreementis poor at small acceptance. The measured cross sections are alsocompared to the predictions of the one-dimensional cross section modelsEPAX2 and NUCFRG2; the latter is presently used in NASA's space radiationtransport calculations. Though PHITS and NUCFRG2 reproduce thecharge-changing cross sections with reasonable accuracy, none of themodels is able to accurately predict the fragment cross sections for allfragment species and target materials.

• Research Organization: Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director, Office of Science; National Aeronautics andSpace Administration
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 929312
• Report Number(s): LBNL--62641; BnR: 400409900
• Journal Information: Physical Review C, Journal Name: Physical Review C Vol. 76
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
CARBON
CROSS SECTIONS
FRAGMENTATION
Galactic Cosmic Rays nuclear fragmentation crosssections
NEOPLASMS
PRODUCTION
RADIATION TRANSPORT
SIMULATION
TARGETS
THERAPY