Water fragmentation and energy loss by carbon ions at the distal region of the Bragg peak.

Montenegro, E C; Shah, M B; Luna, H; Scully, S W J; de Barros, A L F; Wyer, J A; Lecointre, J

Montenegro, E C; Shah, M B; Luna, H; Scully, S W J; de Barros, A L F; Wyer, J A; Lecointre, J.

Afiliación

Montenegro EC; Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528 Rio de Janeiro, 21945-970, RJ, Brazil.

Phys Rev Lett ; 99(21): 213201, 2007 Nov 23.

Article en En | MEDLINE | ID: mdl-18233216

RESUMEN

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.

Asunto(s)

Carbono/química; Transferencia de Energía; Agua/química; Iones; Espectrometría de Masas/métodos; Radioterapia

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carbono / Agua / Transferencia de Energía Idioma: En Revista: Phys Rev Lett Año: 2007 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos

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