Nitrous Oxide Dosimetry. Effects of Temperature, Pressure, and Electric Field<sup>1</sup>

Jones, Francis T.; Sworski, Thomas J.

doi:10.1021/j100877a034

Cited by 53 publications

(21 citation statements)

References 4 publications

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“…In order to measure NOZ, all the material degassed from the gel was collected at -196 "C and 3 ml of 0.1 N NaOI-I were added. Nitrogen dioxide was then determined as nitrite by the method of Rider and Mellon (11,12).…”

Section: Methodsmentioning

confidence: 99%

Radiolysis in the adsorbed state. II. N₂O adsorbed on silica gel and zirconia

Sagert¹,

Robinson²

1968

Can. J. Chem.

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The "Co y-radiolysis of N 2 0 adsorbed o n silica gel and zirconia has been studied. In both systems a large fraction of the energy absorbed in the solid is able to cause decon~position of the N 2 0 . For the silica gel -N 2 0 system, studies with electron scavengers have shown that on gels degassed at low temperatures, electrons are precursors for a large fraction of the yield and about 1 G unit of nitrogen is produced by other processes. The total nitrogen yield is smaller for gels degassed at high temperatures, but the yield of nitrogen produced by direct excitation stays constant at 1 G unit.Experiments using electron scavengers with the zirconia-N20 system have shown that direct excitation of the solid is responsible for most of the nitrogen yield at 7 G units on high surface zirconia. Studies of nitrogen yields o n a number of zirconias showed that the range over which energy is transferred is about 50 A.

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Section: Methodsmentioning

confidence: 99%

Radiolysis in the adsorbed state. II. N₂O adsorbed on silica gel and zirconia

Sagert¹,

Robinson²

1968

Can. J. Chem.

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“…This means that some of the hot hydrogen atoms formed in reaction [3] undergo reaction [4] 14 1 H + HC1-> Hz + C1 before being moderated to thermal energies. However, there is a thermal hydrogen atom yield, G,, of 1.7 per 100 eV.…”

Section: Hydrogen Chloridementioning

confidence: 99%

“…These must come from thecollisional moderation of H [ and threshold dissociation processes which need not be considered in detail here. The yields of Hz and H from reactions [4] and [5] will clearly be unaffected by dose rate. Figure 4 shows a reciprocal plot of the hydrogen yields from the Febetron radiolysis of hydrogen chloride -chlorine mixtures at 700 and 1200 Torr of hydrogen chloride.…”

Section: Hydrogen Chloridementioning

confidence: 99%

“…The primary yields used in the program were those derived from low dose rate studies: GH., = 2.2, G , = 1.8, G,,,+ =4.0, and G a = 6 . 2 (from reactions [3] and [4]). The pulse shape was approximated by a step function with 2 ns steps.…”

Section: Hydrogen Chloridementioning

confidence: 99%

“…We have previously described the radiolysis of nitrous oxide, ethylene (I), and ammonia (2) and discussed the use of nitrous oxide as a dosimeter at these dose rates (1,3). The nitrogen yield, G(N2) = 12.4 molecules per 100 eV, was significantly higher than the value of G(N2) = 10.0 accepted for low dose rates (4). The present study was undertaken to examine the radiolysis of hydrogen chloride and hydrogen bromide at high dose rates and to investigate the reason for the difference in nitrogen yields from nitrous oxide.…”

Section: Introductionmentioning

confidence: 98%

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Gas phase radiolysis of hydrogen chloride, hydrogen bromide, and nitrous oxide with intense electron pulses

Willis¹,

Boyd²

1969

Can. J. Chem.

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Hydrogen chloride and hydrogen bromide have been irradiated with single electron pulses at a very high intensity (loz7 eV g-' s-I) with a Febetron 705. At room temperature the yields of hydrogen from hydrogen chloride and hydrogen bromide, for pressures between 700 and 1200 Torr, are G(H2) = 8.1 i : 0.2 and G(H2) = 9.9 2 0.3, respectively. These are the same as the yields observed a t low dose rates. Detailed lifetime calculations, however, show that the mechanism is significantly different at the higher dose rate. Scavenger experiments with chlorine in hydrogen chloride show that the negative ion intermediates form thermal hydrogen atoms.The value of G(N2) = 12.4 +. 0.2 from nitrous oxide at a dose rate of eV g-l s-l is confirmed and the use of nitrous oxide as a dosimeter for pulsed electron beams is discussed. The higher nitrogen yield at Febetron dose rates appears to be due to changes in the reactions of electrons.

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Mechanismus der direkten und Edelgas‐sensibilisierten γ‐Radiolyse des Cyclopropans

Bünau

Xühnert

1972

Ber Bunsenges Phys Chem

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Die direkte und die durch Kr und Xe sensibilisierte γ‐Radiolyse von Cyclopropan wurde durch quantitative Bestimmung aller wesentlichen Produkte in Abhängigkeit von Druck, Dosisleistung und von Zusätzen (NO, N2O, SF6) untersucht. Die erhaltenen Ergebnisse wurden einer kinetischen Analyse unterworfen, aus der sich Zahlenwerte für die Wahrscheinlichkeiten von einzelnen Zerfallsprozessen und anderen wichtigen Zwischenreaktionen ableiten ließen. Dabei wurde gefunden, daß durch die Edelgase insbesondere die im System möglichen Ionenreaktionen begünstigt werden. Die Bildungsgeschwindigkeit von Radiolyseprodukten ist im Fall der Kr‐Sensibilisierung merklich geringer als bei der direkten oder der durch Xe sensibilisierten Radiolyse. Dies wird darauf zurückgeführt, daß Ladungsübertragung von Kr+ ‐Ionen auf Cyclopropanmoleküle u. a. zur Bildung der wenig reaktiven C3H3+‐Ionen führt. Xe+‐Ionen erzeugen vor allem C3H6‐, C3H5+‐und ‐ Ionen, wobei letztere das Vorliegen von angeregten Xenonionen voraussetzen.

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Nitrous Oxide Dosimetry. Effects of Temperature, Pressure, and Electric Field¹

Cited by 53 publications

References 4 publications

Radiolysis in the adsorbed state. II. N₂O adsorbed on silica gel and zirconia

Radiolysis in the adsorbed state. II. N₂O adsorbed on silica gel and zirconia

Gas phase radiolysis of hydrogen chloride, hydrogen bromide, and nitrous oxide with intense electron pulses

Mechanismus der direkten und Edelgas‐sensibilisierten γ‐Radiolyse des Cyclopropans

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Nitrous Oxide Dosimetry. Effects of Temperature, Pressure, and Electric Field1

Cited by 53 publications

References 4 publications

Radiolysis in the adsorbed state. II. N2O adsorbed on silica gel and zirconia

Radiolysis in the adsorbed state. II. N2O adsorbed on silica gel and zirconia

Gas phase radiolysis of hydrogen chloride, hydrogen bromide, and nitrous oxide with intense electron pulses

Mechanismus der direkten und Edelgas‐sensibilisierten γ‐Radiolyse des Cyclopropans

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Nitrous Oxide Dosimetry. Effects of Temperature, Pressure, and Electric Field¹

Radiolysis in the adsorbed state. II. N₂O adsorbed on silica gel and zirconia

Radiolysis in the adsorbed state. II. N₂O adsorbed on silica gel and zirconia