Anew physics model for the charged particle transport with Geant4

Mendoza, E.; Sansaloni, F.; Arce, P.; Cano‐Ott, D.; Lagáres, J.I.

doi:10.1109/nssmic.2011.6154457

Cited by 6 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that the 13 C(α,n) 16 O reaction has no threshold. A similar situation can be found for TENDL-2014 and TENDL-2015, and for other isotopes such as 11 B, 14,15 N or 29,30 Si. For this reason, we have excluded the TENDL sub-versions with explicit reaction channels from our study.…”

Section: Alpha Incident Data Librariessupporting

confidence: 79%

“…It is worth highlighting the differences between the cross sections provided for 15 N. The values from TENDL are two orders of magnitude larger than the values from JENDL/AN-2005. The impact of this discrepancy on the calculation of neutron yields from α-decay is not big, since the 15 N(α,Xn) reaction has a threshold larger than most of the α-decay energies.…”

Section: Alpha Energy (Mevmentioning

confidence: 81%

“…The limitation come from the difficulty of realistically modeling the low energy (α,n) reactions. Since version 10.2, released in 2015, Geant4 has incorporated the so called ParticleHP module, which is able to use data libraries originally written in ENDF-6 format [14] to manage the non-elastic nuclear reactions of low energy (<200 MeV) charged particles [15]. These data libraries contain information describing nuclear interactions, in particular reaction cross sections and secondary particle production.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Neutron production induced by α-decay with Geant4

Mendoza

Cano‐Ott

Romojaro

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

Neutron production induced by (α,n) reactions is important in various scenarios.One of the most relevant ones is related to underground dark matter experiments, where the neutrons produced by the α-decay from radioactive contaminants in the detector materials can generate an irreducible background, limiting the sensitivity of the experiment. A precise estimate of the background due to these neutrons is crucial for the experiments currently taking data and for the design of the next generation detectors. In this work, we prove that Geant4 can be used to calculate neutron yields and energy spectra induced by α-decay. These neutrons are produced according to the information compiled in data libraries originally written in the ENDF-6 format. In this article we also review the different databases available, showing the differences and similarities among them. Finally, we compare several Geant4 neutron production yields and spectra with experimental data and other codes.

show abstract

Section: Alpha Incident Data Librariessupporting

confidence: 79%

Section: Alpha Energy (Mevmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Neutron production induced by α-decay with Geant4

Mendoza

Cano‐Ott

Romojaro

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

show abstract

“…A different approach has therefore to be used. In particular, recent developments have been made in GEANT4 to improve the reliability of the hadronic interactions at very low energy 21 .…”

Section: Geant4 Simulationsmentioning

confidence: 99%

On the (un)effectiveness of proton boron capture in proton therapy

et al. 2019

View full text Add to dashboard Cite

We present calculations and simulations on the role of the p+ 11 B→3α reaction in proton therapy. This reaction has been recently suggested to be responsible for a decrease in the survival probability of tumor cells, when they are irradiated with low-energy protons. However, at the concentration levels typical of the proposed boron carrier (sodium borocaptate, Na 2 B 12 H 11 SH, in short BSH), i.e. less than 100 ppm, both calculations and Monte Carlo simulations suggest that the dose related to this reaction is orders of magnitude lower than the dose delivered by the primary proton beam inside the tissues. These calculations cast some doubts on the claim of an important role played by Proton Boron Capture in enhancing the therapeutic effectiveness of proton therapy, and suggest that other mechanisms should be investigated in order to explain the observed decrease in the survival probability.

show abstract

“…Last, the QGSP_BIC_ALLHP Physics List was tested. This PL includes the G4ParticleHP package, still under development, which uses nuclear data libraries instead of the default models for the transport of light charged particles 60 . In particular, the inelastic interaction of protons with 12 C and 16 0 up to 150 MeV are simulated using the ENDF/B-VII.1 61 cross section.…”

Section: Simulations Of the Proton Beam And I-tedmentioning

confidence: 99%

Towards machine learning aided real-time range imaging in proton therapy

Lerendegui-Marco¹,

Balibrea-Correa²,

Babiano-Súarez³

et al. 2022

Preprint

View full text Add to dashboard Cite

Compton imaging represents a promising technique for range verification in proton therapy treatments. In this work, we report on the advantageous aspects of the i-TED detector for proton-range monitoring, based on the results of the first Monte Carlo study of its applicability to this field. i-TED is an array of Compton cameras, that have been specifically designed for neutron-capture nuclear physics experiments, which are characterized by γ-ray energies spanning up to 5-6 MeV, rather low γ-ray emission yields and very intense neutron induced γ-ray backgrounds. Our developments to cope with these three aspects are concomitant with those required in the field of hadron therapy, especially in terms of high efficiency for real-time monitoring, low sensitivity to neutron backgrounds and reliable performance at the high γ-ray energies. We find that signal-to-background ratios can be appreciably improved with i-TED thanks to its light-weight design and the low neutron-capture cross sections of its LaCl 3 crystals, when compared to other similar systems based on LYSO, CdZnTe or LaBr 3 . Its high time-resolution (CRT∼500 ps) represents an additional advantage for background suppression when operated in pulsed HT mode. Each i-TED Compton module features two detection planes of very large LaCl 3 monolithic crystals, thereby achieving a high efficiency in coincidence of 0.2% for a point-like 1 MeV γ-ray source at 5 cm distance. This leads to sufficient statistics for reliable image reconstruction with an array of four i-TED detectors assuming clinical intensities of 10 8 protons per treatment point. The use of a two-plane design instead of three-planes has been preferred owing to the higher attainable efficiency for double time-coincidences than for threefold events. The loss of full-energy events for high energy γ-rays is compensated by means of Machine-Learning based algorithms, which allow one to enhance the signal-to-total ratio up to a factor of 2.

show abstract

Anew physics model for the charged particle transport with Geant4

Cited by 6 publications

References 7 publications

Neutron production induced by α-decay with Geant4

Neutron production induced by α-decay with Geant4

On the (un)effectiveness of proton boron capture in proton therapy

Towards machine learning aided real-time range imaging in proton therapy

Contact Info

Product

Resources

About