Monitoring the Bragg peak location of 73 MeV/u carbon ions by means of prompt γ-ray measurements

Testa, E.; Bajard, M.; Chevallier, M.; Dauvergne, D.; Le Foulher, F.; Freud, N.; Létang, J.-M.; Poizat, J.-C.; Ray, C.; Testa, M.
September 2008
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p093506
Academic Journal
By means of a time-of-flight technique, we measured the longitudinal profile of prompt γ-rays emitted by 73 MeV/u 13C ions irradiating a polymethyl methacrylate target. This technique allowed us to minimize the shielding against neutrons and scattered γ-rays, and to correlate prompt gamma emission to the ion path. This correlation, together with a high counting rate, paves the way toward real-time monitoring of the longitudinal dose profile during ion therapy treatments. Moreover, the time correlation between the prompt gamma detection and the transverse position of the incident ions measured by a beam monitor can provide real-time three dimensional control of the irradiation.


Related Articles

  • Saturation Current Densities at the Critical Point of a Spherical Probe in a Moving Collisional Plasma with Negative Ions or Dust Grains. Kashevarov, A. V. // Technical Physics;Apr2005, Vol. 50 Issue 4, p421 

    The problem is considered of the probe diagnostics of a moving, weakly ionized, collision-dominated plasma containing singly charged negative ions or dust grains (heavy multicharged ions). Based on an asymptotic analysis, expressions are obtained that describe the saturation current densities of...

  • Ionization of Nitrogen, Oxygen, Water, and Carbon Dioxide Molecules by Near-Threshold Electron Impact. Zavilopulo, A. N.; Chipev, F. F.; Shpenik, O. B. // Technical Physics;Apr2005, Vol. 50 Issue 4, p402 

    An experimental technique for measuring the cross sections of direct and dissociative ionization of N2 ,O2 ,H2O, and CO2 molecules by electron impact in the near-threshold energy range is described. The setup used in the experiments allows mass separation of ions with a monopole mass...

  • Determining temporal evolution of electron concentration in laser erosion plasma. Chuchman, M. P.; Shuaibov, A. K // Technical Physics Letters;May2008, Vol. 34 Issue 5, p373 

    An alternative method for determining the temporal variation of the electron density in the laser erosion plasma of antimony is described, which differs from the conventional techniques by posing lower requirements to the characteristics of measuring equipment and not employing spectroscopic...

  • Metastable level lifetimes from electron-shelving measurements with ion clouds and single ions. Knoop, M.; Champenois, C.; Hagel, G.; Houssin, M.; Lisowski, C.; Vedel, M.; Vedel, F. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;May2004, Vol. 29 Issue 2, p163 

    The lifetime of the 3d²D5/2-level in singly-ionized calcium has been measured by the electron- shelving technique on different samples of rf trapped ions. The metastable state has been directly populated by exciting the dipole-forbidden 4S½ - 3D5/2 transition. In ion clouds, the natural...

  • Lifetime of C2Cl4- ions produced by nondissociative electron attachment to C2Cl4. Liu, Y.; Suess, L.; Dunning, F. B. // Journal of Chemical Physics;8/1/2005, Vol. 123 Issue 5, p054327 

    The lifetimes of long-lived C2Cl4- ions formed by Rydberg electron transfer in K(np)/C2Cl4 collisions are investigated using a Penning ion trap. Measurements at high n, n>=30, show that low-energy electron attachment to C2Cl4 leads to the production of C2Cl4- ions with a broad range of lifetimes...

  • Electron transfer from semiquinone radicals to copper and iron ions. Porkhun, V. I.; Aristova, Yu. V.; Gurulev, D. N.; Ivanov, Yu. V.; Porkhun, E. V. // Russian Journal of General Chemistry;Oct2013, Vol. 83 Issue 10, p1815 

    Kinetic and thermodynamic parameters of redox reactions and electron transfer between o-benzosemiquinone radicals and iron ions have been determined. The rate constant of the anion-radicals oxidation with Cu 2+ ions has been calculated.

  • 4d→4f dipole resonance of the metal atom encapsulated in a fullerene cage: Ce@C82. Mitsuke, Koichiro; Mori, Takanori; Kou, Junkei; Haruyama, Yusuke; Kubozono, Yoshihiro // Journal of Chemical Physics;2/8/2005, Vol. 122 Issue 6, pN.PAG 

    The yield curves for photoions from Ce@C82 are measured by using synchrotron radiation in the photon energy range from 90 to 160 eV. Parent Ce@C82z+ and fragment ions C60z+ and C70z+ are observed in a mass spectrum (z=1 and 2). The yield curves for doubly charged ionic species exhibit broad...

  • Field electron emission from sputter-induced carbon nanofibers grown at room temperature. Tanemura, Masaki; Tanaka, J.; Itoh, K.; Fujimoto, Y.; Agawa, Y.; Miao, L.; Tanemura, S. // Applied Physics Letters;3/14/2005, Vol. 86 Issue 11, p113107 

    Graphite, carbon-coated silicon, and carbon-coated nickel surfaces were bombarded with obliquely incident Ar+ ions at room temperature. The sputtered surfaces were covered with conical protrusions, ∼2.5×105 mm-2 or higher in numerical density, and partially aligned single carbon...

  • Further characterization of oxygen vacancies and zinc vacancies in electron-irradiated ZnO. Evans, S. M.; Giles, N. C.; Halliburton, L. E.; Kappers, L. A. // Journal of Applied Physics;Feb2008, Vol. 103 Issue 4, p043710 

    Electron paramagnetic resonance (EPR) has been used to monitor oxygen vacancies and zinc vacancies in a ZnO crystal irradiated near room temperature with 1.5 MeV electrons. Out-of-phase detection at 30 K greatly enhances the EPR signals from these vacancies. Following the electron irradiation,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics