Determination of Proton Binding Energies for 89Y, 90Zr, 91Nb and 93Tc from (p,,γ) Reaction Q-Values

It is usually assumed that the oxidation state of the small proportion of Mn sometimes present in micas is +2, although there is evidence from electronic spectroscopy (Burns, 1970) for at least the occasional occurrence of Mn(III) in manganophyllite. We describe here X-ray photoelectron spectroscopic (XPS) measurements on the Mn in a Norwegian lepidolite which was the subject of a concurrent structural study by X-ray photoelectron diffraction (Evans & Raftery, 1982). To establish the Mn oxidation state we have compared the Mn2p core-electron binding energies (BE), the Mn2P3/2-O ls BE differences, and the Mn2p XPS peak profiles from the four common oxides of manganese (MnO, Mn3O4, Mn2O3 and MnO2) with those from the lepidolite. A re-examination of these oxides was undertaken because the agreement between reports in the literature was unsatisfactory, and uncertainty existed concerning the integrity of some of the surfaces previously examined.

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Binding Energies in Zr from (d, p) and (d, t) Reactions

Zeitschrift für Naturforschung A ◽

10.1515/zna-1979-1222 ◽

1979 ◽

Vol 34 (12) ◽

pp. 1536-1537

Author(s):

T. Borello-Lewin ◽

O. Dietzsch

Keyword(s):

Atomic Mass ◽

Previous Measurement ◽

Binding Energies ◽

Neutron Separation Energy ◽

Separation Energy ◽

Standard Deviations ◽

Q Values

Abstract Neutron separation energies in 91Zr, 92Zr, 93Zr and 95Zr were determined by measurements of relative Q-values for (d, p) reactions on Zr isotopes. A comparison is made with separation energies derived from a previous measurement of (d, t) reaction Q-values. The neutron separation energy in 95Zr disagrees by three standard deviations with the adjusted value in the 1977 Atomic Mass Evaluation.

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Determination of the influence of herbicides on dicotyledons plant transpiration using the sap flow method

Plant Soil and Environment ◽

10.17221/655/2014-pse ◽

2014 ◽

Vol 60 (No. 12) ◽

pp. 562-568 ◽

Cited By ~ 1

Author(s):

V. Brant ◽

J. Pivec ◽

K. Hamouzová ◽

P. Zábranský ◽

J. Satrapová ◽

...

Keyword(s):

Chlorophyll Fluorescence ◽

Transpiration Rate ◽

Sap Flow ◽

Herbicide Application ◽

Plant Transpiration ◽

Flow Method ◽

Infrared Gas Analyser ◽

The Impact ◽

Q Values

Physiological parameters are sensitive and provide information on the toxicity of herbicides in plants. The impact of herbicide application on plant transpiration was evaluated by the sap flow method during 2009–2011. The aim of this work was to verify the sap flow method for determining the effect of herbicides on the basis of continuous measurements of the transpiration flow. Helianthus annuus was used as a model plant species. The two different herbicides tested in this study differed by the effect of active ingredients bromoxynil and clopyralid. The water flow was measured using sap flow meter T4.2. The impact of herbicides was assessed by comparing measured transpiration rate (Q) after herbicide application with an extrapolation of transpiration rate of plants before herbicide treatment (Qcalc). After treatment with bromoxynil the Q values decreased significantly compared to Qcalc. For plants treated by clopyralid, the decline of actual transpiration (Q) compared with the modelled one (Qcalc) was less substantial and the plants continued to transpire after the treatment. The effect of herbicides was also verified using infrared gas analyser and chlorophyll fluorescence meter.

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A survey of neutron and proton binding energies

Advances In Physics ◽

10.1080/00018735300101202 ◽

1953 ◽

Vol 2 (6) ◽

pp. 141-184 ◽

Cited By ~ 20

Author(s):

N. Feather

Keyword(s):

Binding Energies ◽

Proton Binding

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Determination of dissociation constants of weak acids by deconvolution of proton binding isotherms derived from potentiometric data

Journal of Solution Chemistry ◽

10.1007/bf00972579 ◽

1996 ◽

Vol 25 (9) ◽

pp. 877-894 ◽

Cited By ~ 5

Author(s):

J. A. Schwarz ◽

Cr. Contescu ◽

V. T. Popa ◽

A. Contescu ◽

Y. Lin

Keyword(s):

Dissociation Constants ◽

Weak Acids ◽

Proton Binding ◽

Binding Isotherms ◽

Potentiometric Data

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Vibrational Properties of the Isotopomers of the Water Dimer Derived from Experiment and Computations

Australian Journal of Chemistry ◽

10.1071/ch13479 ◽

2014 ◽

Vol 67 (3) ◽

pp. 426 ◽

Cited By ~ 10

Author(s):

Robert Kalescky ◽

Wenli Zou ◽

Elfi Kraka ◽

Dieter Cremer

Keyword(s):

Binding Energy ◽

Zero Point ◽

Binding Energies ◽

Water Dimer ◽

General Observation ◽

Reduced Pressure ◽

Point Energy ◽

Deuterium Substitution ◽

Mass Increase

The water dimer and its 11 deuterated isotopomers are investigated utilizing coupled cluster theory and experimental data as input for a perturbational determination of the isotopomer frequencies. Deuterium substitution reduces the H-bond stretching frequency by maximally 12 cm–1 from 143 to 131 cm–1, which makes a spectroscopic differentiation of H- and D-bonds difficult. However, utilizing the 132 frequencies obtained in this work, the identification of all isotopomers is straightforward. The CCSD(T)/CBS value of the binding energy De is 5.00 kcal mol–1. The binding energy D0 of the water dimer increases upon deuterium substitution from 3.28 to maximally 3.71 kcal mol–1 reflecting a decrease in the zero point energy contribution. The entropy values of the D-isotopomers increase from 73 to 77 entropy units in line with the general observation that a mass increase leads to larger entropies. All 12 isotopomers possess positive free binding energies at 80 K and a reduced pressure of 110 Pa, which means that they can be spectroscopically observed under these conditions.

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Photoluminescence of 10H-SiC

Materials Science Forum ◽

10.4028/www.scientific.net/msf.858.269 ◽

2016 ◽

Vol 858 ◽

pp. 269-273

Author(s):

Anne Henry ◽

Hiroshi Yano ◽

Tomoaki Hatayama

Keyword(s):

Electron Microscope ◽

Band Gap ◽

Transmission Electron Microscope ◽

Lower Energy ◽

Free Exciton ◽

Binding Energies ◽

Photoluminescence Spectra ◽

Transmission Electron ◽

First Time

The photoluminescence of the near band gap emission of 10H-SiC is revealed for the first time and detected just below 3.0 eV. The crystallinity thus polytype of the sample is controlled with transmission electron microscope analyses and Laue diffraction. On the photoluminescence spectra up to eight sharp lines are associated to the non-phonon lines of the nitrogen bound exciton even if ten are expected in 10H-SiC. Phonon replicas of these non-phonon lines are observed at lower energy with energy separations similar than those in other hexagonal SiC polytypes. At moderate temperature free-exciton replicas are also observed which allow the determination of the excitonic band gap at 3020.6 meV, value in agreement with the hexagonality of 10H-SiC of 40%. The binding energies associated to the nitrogen bound-excitons are determined as well as the ionization energies of the nitrogen donors in the 10H-SiC polytype.

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