Total cross-section measurements for positrons and electrons colliding with alkane molecules: Normal hexane and cyclohexane

Sueoka, Osamu; Makochekanwa, Casten; Tanino, Hiroshi; Kimura, Mineo

doi:10.1103/physreva.72.042705

Cited by 37 publications

(28 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Comparison shows that both computed TCSs for cyclohexane lie distinctly above the experimental values from Ref. 32.…”

Section: Isomers Of Cmentioning

confidence: 54%

“…Normalized results for cyclohexane were determined using the transmission time-of-flight (TOF) technique employing the guiding magnetic field (of 0.45 mT) in the scattering volume; to put the TCS on the absolute scale, the path length of electrons through the target was evaluated indirectly. 32 In the present TCS measurements for 2,3-dimethyl-2-butene, the magnetic field was reduced in considerable degree (below 0.1 µT) and all quantities necessary for determination of TCS were obtained directly. Comparisons show (for example, see Ref.…”

Section: Isomers Of Cmentioning

confidence: 87%

See 1 more Smart Citation

Electron collisions with methyl-substituted ethylenes: Cross section measurements and calculations for 2-methyl–2-butene and 2,3-dimethyl–2-butene

Szmytkowski

Stefanowska

Zawadzki

et al. 2015

The Journal of Chemical Physics

View full text Add to dashboard Cite

We report electron-scattering cross sections determined for 2-methyl-2-butene [(H3C)HC = C(CH3)2] and 2,3-dimethyl-2-butene [(H3C)2C = C(CH3)2] molecules. Absolute grand-total cross sections (TCSs) were measured for incident electron energies in the 0.5-300 eV range, using a linear electron-transmission technique. The experimental TCS energy dependences for the both targets appear to be very similar with respect to the shape. In each TCS curve, three features are discernible: the resonant-like structure located around 2.6-2.7 eV, the broad distinct enhancement peaking near 8.5 eV, and a weak hump in the vicinity of 24 eV. Theoretical integral elastic (ECS) and ionization (ICS) cross sections were computed up to 3 keV by means of the additivity rule (AR) approximation and the binary-encounter-Bethe method, respectively. Their sums, (ECS+ICS), are in a reasonable agreement with the respective measured TCSs. To examine the effect of methylation of hydrogen sides in the ethylene [H2C = CH2] molecule on the TCS, we compared the TCS energy curves for the sequence of methylated ethylenes: propene [H2C = CH(CH3)], 2-methylpropene [H2C = C(CH3)2], 2-methyl-2-butene [(H3C)HC = C(CH3)2], and 2,3-dimethyl-2-butene [(H3C)2C = C(CH3)2], measured in the same laboratory. Moreover, the isomeric effect is also discussed for the C5H10 and C6H12 compounds.

show abstract

“…Comparison shows that both computed TCSs for cyclohexane lie distinctly above the experimental values from Ref. 32.…”

Section: Isomers Of Cmentioning

confidence: 54%

Section: Isomers Of Cmentioning

confidence: 87%

Electron collisions with methyl-substituted ethylenes: Cross section measurements and calculations for 2-methyl–2-butene and 2,3-dimethyl–2-butene

Szmytkowski

Stefanowska

Zawadzki

et al. 2015

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…Szmytkowski and Kwitnewski [2][3][4] have reported the TCS of several hydrocarbons at energies 0.5-370 eV and discussed the isomer effect in TCS at these energies. Recently, Sueoka et al [5,6] measured the TCS of a series of alkanes and cyclo-alkanes at energies 0.4-1000 eV and discussed the systematic trends in TCS. In a previous publication [11], we have measured the TCS of a series of alkanes at energies 300-4500 eV and developed an empirical expression, based on the number of carbon atoms and hydrogen atoms, to predict the TCS of alkanes.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, there is increased interest in the study of total electron scattering cross sections (TCS) of hydrocarbons, both experimentally and theoretically, because of the increases demand in many areas of pure and applied sciences [1][2][3][4][5][6][7][8]. It is convenient in these applications if there is an analytical expression to determine the TCS of a given hydrocarbon at a given energy.…”

Section: Introductionmentioning

confidence: 99%

Electron scattering from alkenes in the energy range 200–4500 eV

Wickramarachchi

Palihawadana

Villela

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

“…(Kossoski et al, 2011), the hydrocarbons C 3 H 4 (Nakano et al, 2002;Szmytkowski and Kwitnewski, 2002b;Lopes and Bettega, 2003;Makochekanwa et al, 2003;Sanchez et al, 2005;, C 3 H 6 (Mott and Massey, 1965;Floeder et al, 1985;Nishimura and Tawara, 1991;Winstead et al, 1992;Szmytkowski and Kwitnewski, 2002a;Makochekanwa et al, 2005;2008;and Tan et al, 2007), C 4 H 6 Kwitnewski, 2003a andLopes et al, 2004a), C 4 H 8 (Lopes et al, 2004b andBettega et al, 2006), and C 4 H 10 (Floeder et al, 1985;Lopes et al, 2004b;and Bettega et al, 2007), as well as five-membered heterocyclic, aromatic compounds (Kossoski and Bettega, 2013). On the other hand, very little is known about the interaction of positrons with isomers, with just a few investigations for hydrocarbons (Floeder et al, 1985;Kimura et al, 2000;Makochekanwa et al, 2003;2008;Sueoka et al, 2005;and Nunes et al, 2015) and chiral enantiomers being available. Hence, while the isomer effect seems quite distinct in low-energy electron collisions, it is not yet apparent in positron scattering processes.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical cross sections for positron scattering from the pentane isomers

Chiari

Zecca

Blanco

et al. 2016

The Journal of Chemical Physics

View full text Add to dashboard Cite

Isomerism is ubiquitous in chemistry, physics, and biology. In atomic and molecular physics, in particular, isomer effects are well known in electron-impact phenomena; however, very little is known for positron collisions. Here we report on a set of experimental and theoretical cross sections for low-energy positron scattering from the three structural isomers of pentane: normal-pentane, isopentane, and neopentane. Total cross sections for positron scattering from normal-pentane and isopentane were measured at the University of Trento at incident energies between 0.1 and 50 eV. Calculations of the total cross sections, integral cross sections for elastic scattering, positronium formation, and electronic excitations plus direct ionization, as well as elastic differential cross sections were computed for all three isomers between 1 and 1000 eV using the independent atom model with screening corrected additivity rule. No definitive evidence of a significant isomer effect in positron scattering from the pentane isomers appears to be present.

show abstract

Total cross-section measurements for positrons and electrons colliding with alkane molecules: Normal hexane and cyclohexane

Cited by 37 publications

References 28 publications

Electron collisions with methyl-substituted ethylenes: Cross section measurements and calculations for 2-methyl–2-butene and 2,3-dimethyl–2-butene

Electron collisions with methyl-substituted ethylenes: Cross section measurements and calculations for 2-methyl–2-butene and 2,3-dimethyl–2-butene

Electron scattering from alkenes in the energy range 200–4500 eV

Experimental and theoretical cross sections for positron scattering from the pentane isomers

Contact Info

Product

Resources

About