We consider the evaluation of lateral spread distributions of charged particle beams at therapeutic energies, due to an absorber in the form of a homogeneous slab or of a stack. We show that the Molière theory has the same degree of flexibility as the Fermi-Eyges, but is much more accurate and does not present particular computing difficulties with the energy loss formula we have employed. It is also shown that the non-Gaussian shape of the projected one dimensional (1D) distributions is not a complication for passing from the projected to the spatial two-dimensional (2D) distribution, if one assumes circular symmetry. All the calculations are compared with the results of the FLUKA code. The nuclear interaction is not considered here, because it is outside of the scope of this work.

On Molière and Fermi-Eyges scattering theories in hadrontherapy / Embriaco, A.; Bellinzona, V. E.; Fontana, A.; Rotondi, A.. - In: PHYSICS IN MEDICINE AND BIOLOGY. - ISSN 0031-9155. - 62:15(2017), pp. 6290-6303. [10.1088/1361-6560/aa7a94]

On Molière and Fermi-Eyges scattering theories in hadrontherapy

Bellinzona V. E.;
2017

Abstract

We consider the evaluation of lateral spread distributions of charged particle beams at therapeutic energies, due to an absorber in the form of a homogeneous slab or of a stack. We show that the Molière theory has the same degree of flexibility as the Fermi-Eyges, but is much more accurate and does not present particular computing difficulties with the energy loss formula we have employed. It is also shown that the non-Gaussian shape of the projected one dimensional (1D) distributions is not a complication for passing from the projected to the spatial two-dimensional (2D) distribution, if one assumes circular symmetry. All the calculations are compared with the results of the FLUKA code. The nuclear interaction is not considered here, because it is outside of the scope of this work.
15
Embriaco, A.; Bellinzona, V. E.; Fontana, A.; Rotondi, A.
On Molière and Fermi-Eyges scattering theories in hadrontherapy / Embriaco, A.; Bellinzona, V. E.; Fontana, A.; Rotondi, A.. - In: PHYSICS IN MEDICINE AND BIOLOGY. - ISSN 0031-9155. - 62:15(2017), pp. 6290-6303. [10.1088/1361-6560/aa7a94]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/320085
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact