Absolute cross section for DNA damage induced by low-energy (10 eV) electrons: Experimental refinements and sample characterization by AFM

2018 ◽  
Vol 149 (16) ◽  
pp. 164904 ◽  
Author(s):  
N. Brodeur ◽  
P. Cloutier ◽  
A. D. Bass ◽  
G. Bertrand ◽  
D. J. Hunting ◽  
...  
Keyword(s):  
Dna Damage ◽  
Cross Section ◽  
Low Energy ◽  
Absolute Cross Section ◽  
Sample Characterization

scholarly journals Absolute cross section for low-energy-electron damage to condensed macromolecules: A case study of DNA

2012 ◽  
Vol 86 (3) ◽  
Author(s):  
Mohammad Rezaee ◽  
Pierre Cloutier ◽  
Andrew D. Bass ◽  
Marc Michaud ◽  
Darel J. Hunting ◽  
...  
Keyword(s):  
Cross Section ◽  
Low Energy ◽  
Energy Electron ◽  
Absolute Cross Section ◽  
Low Energy Electron

Absolute cross section for trapping low-energy electrons (0–18eV) in molecular films of n-hexane

2006 ◽  
Vol 100 (7) ◽  
pp. 073705 ◽  
Author(s):  
M. Michaud ◽  
E. M. Hébert ◽  
P. Cloutier ◽  
L. Sanche
Keyword(s):  
Cross Section ◽  
Low Energy ◽  
Absolute Cross Section ◽  
Molecular Films ◽  
Low Energy Electrons

Ionization of atomic hydrogen by protons in the energy range 60 to 400 keV

1964 ◽  
Vol 277 (1368) ◽  
pp. 137-141 ◽  
Keyword(s):  
Energy Range ◽  
Cross Section ◽  
Born Approximation ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Low Energy ◽  
Absolute Cross Section ◽  
Energy Data ◽  
Beam Technique ◽  
Good Agreement

Ionization of atomic hydrogen by protons has been investigated by means of the ‘crossed beam ’ technique in which a proton beam from a Van de Graaff accelerator was arranged to intersect a modulated beam of atomic hydrogen produced from a furnace source. The ratio of the cross-section for ionization of atomic hydrogen to that for molecular hydrogen was determined by comparing the signals due to electrons arising from the interaction region when the beam was mainly atomic and when the beam was entirely molecular. The absolute cross-section for ionization of atomic hydrogen by protons was determined from a knowledge of the molecular cross-section. The results are in good agreement with the Born approximation calculations of Bates & Grilling and in fair agreement with the recent low energy data of Fite, Stebbings, Hummer & Brackmann.

Low energy electron scattering from CO: absolute cross section measurements andR-matrix calculations

1996 ◽  
Vol 29 (14) ◽  
pp. 3197-3214 ◽  
Author(s):  
Jennifer C Gibson ◽  
Lesley A Morgan ◽  
Robert J Gulley ◽  
Michael J Brunger ◽  
Christoph T Bundschu ◽  
...  
Keyword(s):  
Cross Section ◽  
Electron Scattering ◽  
Low Energy ◽  
Energy Electron ◽  
Absolute Cross Section ◽  
Low Energy Electron

Absolute inner-shell cross section determination for EELS analysis

1988 ◽  
Vol 46 ◽  
pp. 534-535
Author(s):  
P.A. Crozier
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Absolute Cross Section ◽  
Specimen Thickness ◽  
Mass Thickness ◽  
Scattering Cross ◽  
Before And After ◽  
Estimated Error ◽  
Scattering Cross Sections ◽  
Electron Microscopist

Absolute inelastic scattering cross sections or mean free paths are often used in EELS analysis for determining elemental concentrations and specimen thickness. In most instances, theoretical values must be used because there have been few attempts to determine experimental scattering cross sections from solids under the conditions of interest to electron microscopist. In addition to providing data for spectral quantitation, absolute cross section measurements yields useful information on many of the approximations which are frequently involved in EELS analysis procedures. In this paper, experimental cross sections are presented for some inner-shell edges of Al, Cu, Ag and Au.Uniform thin films of the previously mentioned materials were prepared by vacuum evaporation onto microscope cover slips. The cover slips were weighed before and after evaporation to determine the mass thickness of the films. The estimated error in this method of determining mass thickness was ±7 x 107g/cm2. The films were floated off in water and mounted on Cu grids.

The absolute cross section for photoionization of O2(1Δg)

1970 ◽  
Vol 18 (4) ◽  
pp. 523-531 ◽  
Author(s):  
I.D. Clark ◽  
R.P. Wayne
Keyword(s):  
Cross Section ◽  
Absolute Cross Section ◽  
The Absolute

Remeasurement of the low-energy cross section for the reaction

1979 ◽  
Vol 320 (2) ◽  
pp. 404-412 ◽  
Author(s):  
J.L. Zyskind ◽  
P.D. Parker
Keyword(s):  
Cross Section ◽  
Low Energy

Experiments on the reaction T( d , n ) 4 He I. The 90° cross-section

1951 ◽  
Vol 204 (1079) ◽  
pp. 488-499 ◽  
Keyword(s):  
Cross Section ◽  
Heavy Water ◽  
Incident Beam ◽  
Absolute Magnitude ◽  
Alpha Particles ◽  
Low Energy ◽  
Energy Relation ◽  
Conventional Theory ◽  
Simultaneous Observation ◽  
The Cross

The 90° cross-section of the reaction 3 1 H( d , n ) 4 2 He has been investigated over the energy range 100 to 200 keV (energy of bombarding triton) using the 200 keV accelerating set of the establishment. Two methods have been used. As a preliminary experiment the yield of alpha-particles from a thick heavy-ice target was measured per unit charge of incident beam, as a function of deuteron energy, and the variation of cross-section deduced from the gradient of this excitation curve and the range energy relation for tritons in heavy water. Secondly, a comparison was made between the yield of alpha-particles from the D-T reaction and the yield of protons from the D-D reaction when a beam containing both deuterons and tritons was passed through a heavy-water vapour target. (The energy loss in this target was calculated as only a few hundred electron volts.) To do this a simultaneous observation was made of the protons and alpha-particles using the same counter. The values obtained for the cross-section have been compared with the resonance formulae given by Bretscher & French (1949) and by Tascbek, Everhart, Gittings, Hemmendinger & Jarvis (1948) and have been found to be in disagreement with formulae of this type. From considerations of the absolute magnitude of the cross-section it has been deduced that no conventional theory postulating reaction at a distance equal to the sum of the nuclear radii (cf. Konopinski & Teller 1948) will be able to explain this reaction. The evidence for a low-energy resonance (Allan & Poole 1949) is thought to be inconclusive.

Sign in / Sign up

Export Citation Format

Share Document