Bond correction factors and their applications to the calculation of molecular mean excitation energies
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Bond correction factors and their applications to the calculation of molecular mean excitation energies. / Sauer, Stephan P. A.; Sabin, John R.; Oddershede, Jens.
I: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Bind 468, 2020, s. 28-36.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Bond correction factors and their applications to the calculation of molecular mean excitation energies
AU - Sauer, Stephan P. A.
AU - Sabin, John R.
AU - Oddershede, Jens
PY - 2020
Y1 - 2020
N2 - We report bond correction factors that can be used to calculate molecular mean excitation energies including the effects of chemical bonding. The calculations are based on an extension of Bragg’s rule. We report results for several bonds – neutral and charged - involving gas phase atoms in the first, second and third row of the periodic system. The bond correction factors are dimensionless and turn out to be nearly constant and of the order 1-2. The method is applied to the calculations of mean excitation energies of linear hydrocarbons, amino acids and molecules and molecular ions of astrophysical interest. Examples show that chemical binding effects increase the molecular mean excitation energies with between 4 % to 15 %, smallest for linear, unsaturated molecules and largest for molecules with longer aliphatic chains.
AB - We report bond correction factors that can be used to calculate molecular mean excitation energies including the effects of chemical bonding. The calculations are based on an extension of Bragg’s rule. We report results for several bonds – neutral and charged - involving gas phase atoms in the first, second and third row of the periodic system. The bond correction factors are dimensionless and turn out to be nearly constant and of the order 1-2. The method is applied to the calculations of mean excitation energies of linear hydrocarbons, amino acids and molecules and molecular ions of astrophysical interest. Examples show that chemical binding effects increase the molecular mean excitation energies with between 4 % to 15 %, smallest for linear, unsaturated molecules and largest for molecules with longer aliphatic chains.
KW - Faculty of Science
KW - Mean excitation energy
KW - Bragg's rule
KW - stopping power
KW - random phase approximation
U2 - 10.1016/j.nimb.2020.02.021
DO - 10.1016/j.nimb.2020.02.021
M3 - Journal article
VL - 468
SP - 28
EP - 36
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
SN - 0168-583X
ER -
ID: 236185648