Water fragmentation and energy loss by carbon ions at the distal region of the Bragg peak.
Time-of-flight mass spectrometry was used to investigate fragmentation and energy transfer processes in water by C ions at the distal part of the Bragg peak. Measurements of the positive ion fragments from ionization, electron capture, electron loss, transfer-loss and loss-ionization channels have allowed us for the first time (a) to obtain a quantitative determination of the energy lost by C ions in water and (b) to show that total water fragment ion production has a much flatter profile with projectile energy than would be expected if the water radical formation was assumed to follow the energy-loss profile obtained from available stopping power models.
Montenegro
E C
EC
Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528 Rio de Janeiro, 21945-970, RJ, Brazil.
Shah
M B
MB
Luna
H
H
Scully
S W J
SW
de Barros
A L F
AL
Wyer
J A
JA
Lecointre
J
J
D002244:Carbon / Q000737:chemistry*; D004735:Energy Transfer; D007477:Ions; D013058:Mass Spectrometry / Q000379:methods; D011878:Radiotherapy; D014867:Water / Q000737:chemistry*
D007477:Ions; D014867:Water; D002244:Carbon