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Wyświetlanie 1-3 z 3
Tytuł:
Influence of Repeller Potential on Ion-Molecule Reactions in $H_2S$ and $CH_4$ Mixtures
Autorzy:
Wójcik, L.
Markowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1503759.pdf
Data publikacji:
2011-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.75.+h
82.30.Fi
Opis:
Ion-molecule reactions initiated by electron impact in the hydrogen sulfide-methane mixtures have been studied by means of quadrupole mass spectrometer with a high-pressure ion source. The total gas pressure of investigated mixtures was changed from 0.7 to 33.3 Pa. Influence of repeller potential on ion-molecule reactions have been studied. The repeller potential was changed in the range 2-12 V. Measurements were performed for different concentrations of methane and hydrogen sulfide in the mixture (from 10% $H_2S$ + 90% $CH_4$ to 90% $H_2S$ + 10% $CH_4$ with 10% increment). The major ion-molecule reactions have been identified. The primary ions $C^{+},$ $CH^{+},$ $CH_2^{+},$ $CH_3^{+},$ $CH_4^{+},$ $S^{+},$ $HS^{+},$ $H_2S^{+}$ produced in gas by the electrons with the energy of 300 eV and secondary $CH_5^{+},$ $C_2H_5^{+},$ $H_3S^{+},$ $H_2^{34}S^{+},$ $H_3^{34}S^{+},$ $CHS^{+},$ $CH_3S^{+},$ $S_2^{+},$ $HS_2^{+},$ $H_2S_2^{+}$ and $H_3S_2^{+}$ from the ion-molecule reactions were observed. Relative intensities for primary and secondary ions are presented as a function of potential of repeller electrode and concentration of methane in the mixture.
Źródło:
Acta Physica Polonica A; 2011, 120, 1; 13-15
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mass Spectrometric Study of Positive Ion-Molecule Reactions in the $C_{3}H_{6}$ and Ar Mixtures Inside the High Pressure Ion Source
Autorzy:
Markowski, A.
Szot, E.
Wójcik, L.
Powiązania:
https://bibliotekanauki.pl/articles/1400475.pdf
Data publikacji:
2013-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.30.Fi
07.75.+h
07.81.+a
92.60.Sz
Opis:
Ion-molecule reactions have been measured for the propene-argon mixtures of different compositions using a quadrupole mass spectrometer with a high-pressure ion source. The concentration of propane in these mixtures ranged from 10% to 90% (at 10% increment). The following primary and secondary ions: $CH_{5}^{+}$ (m/q=17), $C_{2}H_{2}^{+}$ (m/q=26), $C_{2}H_{3}^{+}$ (m/q=27), $C_{2}H_{4}^{+}$ (m/q=28), $C_{2}H_{5}^{+}$ (m/q=29), $C_{3}H_{3}^{+}//\text{}^{39}Ar^{+}$ (m/q=39), $C_{3}H_{4}^{+}//\text{}^{40}Ar^{+}$ (m/q=40), $C_{3}H_{5}^{+}$ (m/q=41), $C_{3}H_{6}^{+}//\text{}^{42}Ar^{+}$ (m/q=42), $C_{3}H_{7}^{+}$ (m/q=43), $C_{3}H_{8}^{+}$ (m/q=44), $C_{4}H_{5}^{+}$ (m/q=53), $C_{4}H_{6}^{+}$ (m/q=54), $C_{4}H_{7}^{+}$ (m/q=55), $C_{4}H_{8}^{+}$ (m/q=56), $C_{4}H_{9}^{+}$ (m/q=57), $C_{5}H_{5}^{+}$ (m/q=65), $C_{5}H_{6}^{+}$ (m/q=66), $C_{5}H_{7}^{+}$ (m/q=67), $C_{5}H_{8}^{+}$ (m/q=68), $C_{5}H_{9}^{+}$ (m/q=69), $C_{5}H_{10}^{+}$ (m/q=70) were observed. Relative ion current intensities for primary and secondary ions are presented as a function of both total mixtures pressure and concentration of propene in the mixture. Primary ions were produced by electrons with the energy of 300 eV. The potential of repeller electrode $V_{R}$ inside the ion source collision chamber was fixed at 5 V for all measurements. The total mixture pressure was changed from 0.7 to 26.6 Pa. Schemes of ion-molecule reactions were proposed.
Źródło:
Acta Physica Polonica A; 2013, 123, 5; 911-915
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fragmentation and Kinetic Energy Release of Ions Produced from $C_2H_5OH$
Autorzy:
Szot, E.
Głuch, K.
Wójcik, L.
Powiązania:
https://bibliotekanauki.pl/articles/1400424.pdf
Data publikacji:
2013-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.75.+h
34.80.Ht
33.15.Fm
34.80.Gs
Opis:
The high resolution double focusing mass spectrometer of reversed Nier-Johnson geometry was used in research of ionization and fragmentation processes of ethanol molecules $C_2H_5OH$. Using the mass-analyzed ion kinetic energy technique, fragmentation paths and kinetic energy release distributions were examined for the four fragmentation reactions: $C_2H_6O^{+} \rightarrow C_2H_5O^{+},$ $C_2H_6O^{+} \rightarrow C_2H_3O^{+},$ $CH_3O^{+} \rightarrow CH_2O^{+}$ and $CH_3O^{+} \rightarrow CHO^{+}$. For all fragment ions from these reactions mean values of kinetic energy release 〈ε〉 were determined. We calculated mean values of 〈ε〉 as 22.70 meV, 62.15 meV, 30.25 meV, and 117.20 meV for $C_2H_5O^{+},$ $C_2H_3O^{+},$ $CH_2O^{+},$ and for $CHO^{+}$ ions, respectively.
Źródło:
Acta Physica Polonica A; 2013, 123, 5; 797-799
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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