Relativistic elastic differential cross sections for equal mass nuclei

Werneth, Charles M.; Maung, Khin Maung; Ford, William P.

doi:10.1016/j.physletb.2015.08.002

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…Moreover, total fragmentation cross section models can be used for normalizing and anchoring parametric models, such as DDFRG [12,13,119]. Werneth et al [146][147][148][149][150] developed a relativistic (kinematics) multiple scattering theory (RMST) for the prediction of reaction, elastic, total, and elastic differential cross sections for space radiation-relevant reactions. The fundamental nuclear constituents of the MST are defined as the nucleons, and the quark structure of individual nucleons is not considered.…”

Section: Modelingmentioning

confidence: 99%

“…Relativistic kinematics are easily incorporated into the momentum-space formulation of the LS equation [146,147], and a large shift toward small angles and with larger magnitude is observed in the elastic differential cross sections. Another interesting result is that relativistic kinematic effects will depend on both energy and relative mass of the projectile and target [148]. A comprehensive validation effort [149] showed that the FIGURE 20 | Experimental data of total reaction cross sections for 4 Heinduced reactions on 237 Np targets, compared with two different parameterizations.…”

Section: Modelingmentioning

confidence: 99%

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Are Further Cross Section Measurements Necessary for Space Radiation Protection or Ion Therapy Applications? Helium Projectiles

et al. 2020

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The helium (4He) component of the primary particles in the galactic cosmic ray spectrum makes significant contributions to the total astronaut radiation exposure. 4He ions are also desirable for direct applications in ion therapy. They contribute smaller projectile fragmentation than carbon (12C) ions and smaller lateral beam spreading than protons. Space radiation protection and ion therapy applications need reliable nuclear reaction models and transport codes for energetic particles in matter. Neutrons and light ions (1H, 2H, 3H, 3He, and 4He) are the most important secondary particles produced in space radiation and ion therapy nuclear reactions; these particles penetrate deeply and make large contributions to dose equivalent. Since neutrons and light ions may scatter at large angles, double differential cross sections are required by transport codes that propagate radiation fields through radiation shielding and human tissue. This work will review the importance of 4He projectiles to space radiation and ion therapy, and outline the present status of neutron and light ion production cross section measurements and modeling, with recommendations for future needs.

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Section: Modelingmentioning

confidence: 99%

Section: Modelingmentioning

confidence: 99%

Are Further Cross Section Measurements Necessary for Space Radiation Protection or Ion Therapy Applications? Helium Projectiles

et al. 2020

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Advances in space radiation physics and transport at NASA

Norbury

Slaba

Aghara

et al. 2019

Life Sciences in Space Research

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Relativistic three-dimensional Lippmann-Schwinger cross sections for space radiation applications

Werneth

Norman

et al. 2017

Nuclear Instruments and Methods in Physics Research Section B:

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Radiation transport codes require accurate nuclear cross sections to compute particle fluences inside shielding materials. The Tripathi semi-empirical reaction cross section, which includes over 60 parameters tuned to nucleon-nucleus (NA) and nucleus-nucleus (AA) data, has been used in many of the world's best-known transport codes. Although this parameterization fits well to reaction cross section data, the predictive capability of any parameterization is questionable when it is used beyond the range of the data to which it was tuned. Using uncertainty analysis, it is shown that a relativistic Three-Dimensional Lippmann-Schwinger (LS3D) equation model based on Multiple Scattering Theory (MST) that uses 5 parameterizations-3 fundamental parameterizations to nucleon-nucleon (NN) data and 2 nuclear charge density parameterizations-predicts NA and AA reaction cross sections as well as the Tripathi cross section parameterization for reactions in which the kinetic energy of the projectile in the laboratory frame (T Lab ) is greater than 220 MeV/n. The relativistic LS3D model has the additional advantage of being able to predict highly accurate total and elastic cross sections. Consequently, it is recommended that the relativistic LS3D model be used for space radiation applications in which T Lab > 220 MeV/n.

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Relativistic elastic differential cross sections for equal mass nuclei

Cited by 3 publications

References 25 publications

Are Further Cross Section Measurements Necessary for Space Radiation Protection or Ion Therapy Applications? Helium Projectiles

Are Further Cross Section Measurements Necessary for Space Radiation Protection or Ion Therapy Applications? Helium Projectiles

Advances in space radiation physics and transport at NASA

Relativistic three-dimensional Lippmann-Schwinger cross sections for space radiation applications

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