Fragmentation cross sections of 28Si at beam energies from to

Zeitlin, C.; Fukumura, Akifumi; Guetersloh, S.; Heilbronn, L.; Iwata, Y.; Miller, Jack; Murukami, T.

doi:10.1016/j.nuclphysa.2006.10.088

Cited by 73 publications

(85 citation statements)

References 12 publications

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“…Our recent publication [16] made extensive comparisons of QMSFRG to experimental cross sections for Ne, Mg, Ar, and Fe. In Figure 1 we show comparisons of the correlations between QMSFRG and the recent data by Zeitlin et al [17] for 28 Si fragmentation cross sections at several energies for C and Al targets. As in our earlier work, QMSFRG demonstrates good agreement with fragmentation cross sections for projectile fragments as function of target mass and beam energy with over 85% of the cross sections agreeing to within +25 percent of measurements.…”

Section: Resultsmentioning

confidence: 96%

Description of light ion production cross sections and fluxes on the Mars surface using the QMSFRG model

Cucinotta

Kim

Schneider

et al. 2007

Radiat Environ Biophys

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The atmosphere of Mars significantly attenuates the heavy ion component of the primary galactic cosmic rays (GCR), however increases the fluence of secondary light ions (neutrons, and hydrogen and helium isotopes) because of particle production processes.We describe results of the quantum multiple scattering fragmentation (QMSFRG) model for the production of light nuclei through the distinct mechanisms of nuclear abrasion and ablation, coalescence, and cluster knockout. The QMSFRG model is shown to be in excellent agreement with available experimental data for nuclear fragmentation cross sections. We use the QMSFRG model and the space radiation transport code, HZETRN to make predictions of the light particle environment on the Martian surface at solar minimum and maximum. The radiation assessment detector (RAD) experiment will be launched in 2009 as part of the Mars Science Laboratory (MSL). We make predictions of the expected results for time dependent count-rates to be observed by RAD experiment.Finally, we consider sensitivity assessments of the impact of the Martian atmospheric composition on particle fluxes at the surface.https://ntrs.nasa.gov/search

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Section: Resultsmentioning

confidence: 96%

Description of light ion production cross sections and fluxes on the Mars surface using the QMSFRG model

Cucinotta

Kim

Schneider

et al. 2007

Radiat Environ Biophys

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“…Systematic studies of Si fragmentation on targets of light, intermediate and heavy composition have been carried out in the last few years at the HIMAC in Chiba, and at the BNL AGS. The results of these experiments were recently published [16]. Comparisons with the predictions of our model, as far as projectile-like fragment production cross sections are concerned, are under way.…”

Section: Projectile-like Fragment Emissionmentioning

confidence: 89%

“…Furthermore, the authors of ref. [16] suggest the hyphotesis that electromagnetic dissociation can contribute to the Z = 12, 13 fragment production cross sections at high energy for the heaviest targets. At present, we have not tested this hypothesis yet.…”

Section: Projectile-like Fragment Emissionmentioning

confidence: 96%

“…A few results, for the lowest energies cases, are plotted in figures 4, 5, 6. Detector acceptance was taken into account in performing our simulations by means of cuts in energy and angle, which allow to select only projectile-like fragments escaping the target within a few degrees around forward direction, according to the angular acceptances given in [16]. Due to the features of the detectors used in these experiments, data are available for fragments with charge Z = 6-13 only.…”

Section: Projectile-like Fragment Emissionmentioning

confidence: 99%

“…Anyway, the authors of ref. [16] observe that their largest uncertainties concern the determination of the Z = 13 fragment production cross sections, due to superposition effects with the high-energy tails of primary ions that cross the targets without interacting, which have to be cut. These uncertainties are more important at lower energies, due to the use of thin targets to avoid significant energy losses of projectiles, which would lead to misleading reaction cross sections.…”

Section: Projectile-like Fragment Emissionmentioning

confidence: 99%

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A fully microscopical simulation of nuclear collisions by a new QMD model

Garzelli

2007

Nd2007

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Abstract. Nucleon-ion and ion-ion collisions at non relativistic bombarding energies can be described by means of Monte Carlo approaches, such as those based on the Quantum Molecular Dynamics (QMD) model. We have developed a QMD code, to simulate the fast stage of heavy-ion reactions, and we have coupled it to the de-excitation module available in the FLUKA Monte Carlo transport and interaction code. The results presented in this work span the projectile bombarding energy range within 200-600 MeV/A, allowing to investigate the capabilities and limits of our non-relativistic QMD approach. General framework and motivation of this workA fully microscopical simulation of nucleon-ion and ionion collisions, at nucleon level, can be performed, among several different approaches [1], by means of Quantum Molecular Dynamics (QMD) models [2]. They are dynamical models which allow to study the phase-space evolution of the projectile-target colliding systems, from their initial mutual trajectory influence and eventually their overlap, depending on the impact parameter, to the compression phase, accompanied by a temperature and density increase, up to the following expansion stage, characterized by the formation of hot excited fragments (pre-fragments). The whole phase occurs on a time scale within a few hundreds fm/c, depending on the size of the colliding systems and the bombarding energy, and is called the "fast" stage of the reaction.Additionally, improved versions of QMD models (e.g., the CoMD one, developed by Papa et al. [3]) allow to compute the system evolution even for a longer time, up to thousands fm/c, and thus have also been used to describe pre-fragment de-excitation, at least in its initial stage. This has led to direct comparisons of the results of improved QMD simulations to experimental data concerning fragment emission distributions. On the other hand, pre-fragment de-excitation can occur on a time scale even larger (up to ∼10 −15 s). Thus, a complete treatment of this slow stage can be covered by different models, generally based on statistical considerations. The underlying assumption in applying one of these statistical models to nuclear systems is that they are thermalized. While at the lowest energies the colliding ions stay close to each other for a time long enough for thermalization to occur, to define a temperature for the whole system at higher energies (several tens MeV/A) can be very problematic, since the expansion phase can begin before a global thermalization process is completed. Anyway, in the last case, at advanced time in the expansion stage pre-fragments are well separated and each of them is supposed to be thermalized. Whereas theoretical models allow to compute an excitation energy for each pre-fragment, from the experimental point of view the problem of the determination of hot fragment temperatures a Presenting author, e-mail: maria.garzelli@mi.infn.it is still open. On the other hand, planned applications (such as hadrontherapy and space radioprotection) need models and tools to ca...

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Determination of the neutron skin thickness from interaction cross section and charge-changing cross section for B, C, N, O, F isotopes

Fang

2016

NUCL SCI TECH

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Fragmentation cross sections of 28Si at beam energies from to

Cited by 73 publications

References 12 publications

Description of light ion production cross sections and fluxes on the Mars surface using the QMSFRG model

Description of light ion production cross sections and fluxes on the Mars surface using the QMSFRG model

A fully microscopical simulation of nuclear collisions by a new QMD model

Determination of the neutron skin thickness from interaction cross section and charge-changing cross section for B, C, N, O, F isotopes

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