The biserm cross-section library for analyzing radiation damage to materials caused by nucleons with energies up to 800 MeV

1992 ◽  
Vol 72 (2) ◽  
pp. 194-196
Author(s):  
A. Yu. Konobeev ◽  
Yu. A. Korovin
Keyword(s):  
Radiation Damage ◽  
Cross Section

Studies of metaphase chromosomes in the scanning transmission x-ray microscope: Image fidelity, radiation damage and specimen preparation

1992 ◽  
Vol 50 (2) ◽  
pp. 1038-1039
Author(s):  
Shawn Williams ◽  
Xiaodong Zhang ◽  
Susan Lamm ◽  
Jack Van’t Hof
Keyword(s):  
Visible Light ◽  
Radiation Damage ◽  
Cross Section ◽  
Imaging Techniques ◽  
Dose Range ◽  
Specimen Preparation ◽  
X Rays ◽  
Metaphase Chromosomes ◽  
X Ray ◽  
Scanning Transmission

The Scanning Transmission X-ray Microscope (STXM) is well suited for investigating metaphase chromosome structure. The absorption cross-section of soft x-rays having energies between the carbon and oxygen K edges (284 - 531 eV) is 6 - 9.5 times greater for organic specimens than for water, which permits one to examine unstained, wet biological specimens with resolution superior to that attainable using visible light. The attenuation length of the x-rays is suitable for imaging micron thick specimens without sectioning. This large difference in cross-section yields good specimen contrast, so that fewer soft x-rays than electrons are required to image wet biological specimens at a given resolution. But most imaging techniques delivering better resolution than visible light produce radiation damage. Soft x-rays are known to be very effective in damaging biological specimens. The STXM is constructed to minimize specimen dose, but it is important to measure the actual damage induced as a function of dose in order to determine the dose range within which radiation damage does not compromise image quality.

The Role of Sn, Zr and Hf in the Radiation Damage in II, III, IV and V Pyrochlores

2012 ◽  
Vol 1383 ◽  
Author(s):  
Karl R. Whittle ◽  
Massey de los Reyes ◽  
Mark G. Blackford ◽  
Nestor J. Zaluzec ◽  
Gregory R. Lumpkin
Keyword(s):  
Radiation Damage ◽  
Cross Section ◽  
Radiation Tolerance ◽  
User Facility

ABSTRACTCeramics based on the general compositions CaLnXNbO7 (where Ln = La, Nd and Sm, and X=Zr and Sn) have been prepared, and irradiated with 1 MeV Kr ions at the IVEM-TANDEM user facility. The radiation tolerance of these materials has been found to be less than Zr and Hf equivalents. The results also suggest that the amorphisation cross section for these materials is related to the Ln component, and is similar to those observed for Zr and Hf equivalents.

Spallation Radiation Damage Calculations and Database: Cross-Section Discrepancies between the Codes

2006 ◽  
Vol 3 (7) ◽  
pp. 13467 ◽  
Author(s):  
Wei Lu ◽  
MS Wechsler ◽  
PD Ferguson ◽  
EJ Pitcher ◽  
SW Dean
Keyword(s):  
Radiation Damage ◽  
Cross Section

Transmutation Doping of III-Nitrides

1999 ◽  
Vol 572 ◽  
Author(s):  
Galina Popovici
Keyword(s):  
Radiation Damage ◽  
Cross Section ◽  
Neutron Irradiation ◽  
Neutron Capture ◽  
Capture Cross Section ◽  
Capture Cross ◽  
Neutron Capture Cross Section ◽  
Transmutation Doping ◽  
N Compounds

ABSTRACTTransmutation doping of (In, Ga, Al)N compounds by neutron irradiation is a promising and totally unexplored field to date. It is much more effective than that of Si due to large neutron capture cross section and abundance of In, Al and Ga isotopes participating in reaction. This should make the irradiation possible in low-flux reactors and result in smaller radiation damage. Annealing of the radiation damage seems feasible.

Nanopillar Fabrication with Focused Ion Beam Cutting

2014 ◽  
Vol 20 (5) ◽  
pp. 1581-1584 ◽  
Author(s):  
Oleksii V. Kuzmin ◽  
Yutao T. Pei ◽  
Jeff T.M. De Hosson
Keyword(s):  
Aspect Ratio ◽  
Radiation Damage ◽  
Cross Section ◽  
Focused Ion Beam ◽  
Incident Angle ◽  
Ion Beam ◽  
Large Aspect Ratio ◽  
Milled Surface ◽  
Key Features ◽  
The Cross

AbstractA versatile method to fabricate taper-free micro-/nanopillars of large aspect ratio was developed with focused ion beam (FIB) cutting. The key features of the fabrication are a FIB with an incident angle of 90° to the long axis of the pillar that enables milling of the pillar sideways avoiding tapering and the FIB current can be reduced step by step so as to reduce possible radiation damage of the milled surface by Ga ions. A procedure to accurately determine the cross-section of each pillar was developed.

scholarly journals The Use of the MCNP Code for Radiation Damage Calculations

2021 ◽  
pp. 70-77
Author(s):  
Mohammad Hiwa ◽  
Keyword(s):  
Monte Carlo ◽  
Radiation Damage ◽  
Cross Section ◽  
Neutron Energy ◽  
Radiation Transport ◽  
Mcnp Code ◽  
Transport Calculation ◽  
Energy Irradiation ◽  
Basic Concepts ◽  
The Impact

This work gives a detailed analysis of the result of Monte Carlo physics practical using MCNP. This paper describes basic concepts of the Monte Carlo theory of radiation transport calculation and also discusses the variance and the history method as used in Monte Carlo Problem solving. Therefore, in this exercise the MCNP code has been used to solve and estimate the number of neutron flux. The paper investigated the impact of the primary radiation damage in iron by the neutron energy irradiation. The established measurement of radiation damage is the displacements per atom (dpa) in matter as a function of neutron energy. The simulations were carried out to calculate the dpa cross section.

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