scholarly journals Dynamical Evolution of Heavy-Ion Scattering in the High-Energy Region

2012 ◽  
Vol 196 ◽  
pp. 219-224 ◽  
Author(s):  
Takenori Furumoto ◽  
Yukinori Sakuragi ◽  
Yasuo Yamamoto
Keyword(s):  
Energy Region ◽  
Dynamical Evolution ◽  
Heavy Ion ◽  
High Energy ◽  
Ion Scattering ◽  
High Energy Region ◽  
Heavy Ion Scattering

Neutron decay of the excitation-energy region up to 60 MeV, excited by heavy-ion scattering. (II) 90Zr and 124Sn

1994 ◽  
Vol 578 (1-2) ◽  
pp. 267-284 ◽  
Author(s):  
J. Blomgren ◽  
A.M. van den Berg ◽  
J.A. Bordewijk ◽  
S. Brandenburg ◽  
D. Chmielewska ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Energy Region ◽  
Heavy Ion ◽  
Neutron Decay ◽  
Ion Scattering ◽  
Heavy Ion Scattering

scholarly journals Heavy ion acceleration at parallel shocks

2010 ◽  
Vol 17 (6) ◽  
pp. 663-671 ◽  
Author(s):  
V. L. Galinsky ◽  
V. I. Shevchenko
Keyword(s):  
Alpha Particle ◽  
Ad Hoc ◽  
Large Mass ◽  
Heavy Ion ◽  
High Energy ◽  
Alpha Particles ◽  
Ion Scattering ◽  
High Energy Tail ◽  
Heavy Ion Scattering ◽  
Loading Parameter

Abstract. A study of alpha particle acceleration at parallel shock due to an interaction with Alfvén waves self-consistently excited in both upstream and downstream regions was conducted using a scale-separation model (Galinsky and Shevchenko, 2000, 2007). The model uses conservation laws and resonance conditions to find where waves will be generated or damped and hence where particles will be pitch-angle scattered. It considers the total distribution function (for the bulk plasma and high energy tail), so no standard assumptions (e.g. seed populations, or some ad-hoc escape rate of accelerated particles) are required. The heavy ion scattering on hydromagnetic turbulence generated by both protons and ions themselves is considered. The contribution of alpha particles to turbulence generation is important because of their relatively large mass-loading parameter Pα=nαmα/npmp (mp, np and mα, nα are proton and alpha particle mass and density) that defines efficiency of wave excitation. The energy spectra of alpha particles are found and compared with those obtained in test particle approximation.

scholarly journals HIGH-ENERGY APPROXIMATION FOR NUCLEUS–NUCLEUS SCATTERING

2001 ◽  
Vol 10 (03) ◽  
pp. 169-183 ◽  
Author(s):  
V. K. LUKYANOV ◽  
E. V. ZEMLYANAYA
Keyword(s):  
Heavy Ion ◽  
High Energy ◽  
Ion Scattering ◽  
Heavy Ion Scattering ◽  
Energy Approximation ◽  
Nucleus Scattering ◽  
Type Potential ◽  
Comparison With Experimental Data ◽  
Straight Trajectory

The high-energy approximation is adapted for heavy ion scattering at energies of several dozen MeV/nucleon. It is shown that the closed form of the eikonal phase suggested for the realistic Woods–Saxon type potential is a hopeful one for further applications. The Glauber–Sitenko small angle approach is analyzed, and a role of the Coulomb deviation of the straight trajectory of motion is investigated. Methodical calculations and comparison with experimental data are made.

Neutron decay of the excitation-energy region up to 60 MeV, excited by heavy ion scattering. (I) 208Pb

1994 ◽  
Vol 578 (1-2) ◽  
pp. 238-266 ◽  
Author(s):  
A.M. van den Berg ◽  
D. Chmielewska ◽  
J.A. Bordewijk ◽  
S. Brandenburg ◽  
A. van der Woude ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Energy Region ◽  
Heavy Ion ◽  
Neutron Decay ◽  
Ion Scattering ◽  
Heavy Ion Scattering

scholarly journals Analysis of Shielding Performance of Radiation-Shielding Materials According to Particle Size and Clustering Effects

2021 ◽  
Vol 11 (9) ◽  
pp. 4010
Author(s):  
Seon-Chil Kim
Keyword(s):  
Particle Size ◽  
Polymer Material ◽  
Energy Region ◽  
High Energy ◽  
Radiation Shielding ◽  
High Energy Region ◽  
Particle Structure ◽  
Effect Of Particle Size ◽  
Extensive Body ◽  
Shielding Material

In the field of medical radiation shielding, there is an extensive body of research on process technologies for ecofriendly shielding materials that could replace lead. In particular, the particle size and arrangement of the shielding material when blended with a polymer material affect shielding performance. In this study, we observed how the particle size of the shielding material affects shielding performance. Performance and particle structure were observed for every shielding sheet, which were fabricated by mixing microparticles and nanoparticles with a polymer material using the same process. We observed that the smaller the particle size was, the higher both the clustering and shielding effects in the high-energy region. Thus, shielding performance can be improved. In the low-dose region, the effect of particle size on shielding performance was insignificant. Moreover, the shielding sheet in which nanoparticles and microsized particles were mixed showed similar performance to that of the shielding sheet containing only microsized particles. Findings indicate that, when fabricating a shielding sheet using a polymer material, the smaller the particles in the high-energy region are, the better the shielding performance is. However, in the low-energy region, the effect of the particles is insignificant.

Polarization potentials in heavy ion scattering and fusion

1990 ◽  
Vol 237 (1) ◽  
pp. 19-23 ◽  
Author(s):  
B.T. Kim ◽  
M. Naito ◽  
T. Udagawa
Keyword(s):  
Heavy Ion ◽  
Ion Scattering ◽  
Heavy Ion Scattering
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