We studied the effects of surface oxidation on the kinetics of hydrogen (H) absorption into two commercial samples of Cc: bulk samples and thin rolled foils. A Sieverts' apparatus was used to measure the H absorption kinetics and X-ray photoelectron spectroscopy (XPS) was used to determine the surface oxidation state and the presence of impurities, notably carbon (Q. In the as-received condition, the bulk Cc specimen was covered by a Ce2O3 film (sesquioxide) whereas the as-received foil was covered with a CeO2 film (dioxide). In this condition, the H absorption rate at room temperature was approximately an order of magnitude faster in the bulk sample than in the foil. Vacuum annealing at P <= 1 x 10(-4) Torr and T = 773 K significantly increased the rate of H uptake, making it similar in both samples. This annealing reduced the Ce2O3 in the bulk samples so that the samples became more metallic, but produced little change in the XPS signal from the CeO2 film on the foil sample. The study suggests that the differences in H uptake kinetics are affected not only by the nature of the oxide (sesquioxide versus dioxide) but also by the integrity of the surface oxide film, which may be affected by the thermal treatment. Published by Elsevier B.V.

Time-resolved measurements have revealed many interesting features in harmonic emissions. These measurements allow us to infer details about laser plasma interaction dynamics such as temporal behavior of electron density and temperature distribution as well as enhanced target absorption.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProton-induced x-ray emission analysis of deep-sea ferromanganese nodulesStephen J. Kirchner, H. Oona, Steven J. Perron, Quintus. Fernando, John Jong-Hae. Lee, and Harry. ZeitlinCite this: Anal. Chem. 1980, 52, 13, 2195–2201Publication Date (Print):November 1, 1980Publication History Published online1 May 2002Published inissue 1 November 1980https://pubs.acs.org/doi/10.1021/ac50063a046https://doi.org/10.1021/ac50063a046research-articleACS PublicationsRequest reuse permissionsArticle Views30Altmetric-Citations12LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThin carbon foils for the elimination of charging effects in proton induced x-ray emission spectrometryH. Oona, Stephen J. Kirchner, Peter L. Kresan, Quintus. Fernando, and Harry. ZeitlinCite this: Anal. Chem. 1979, 51, 2, 302–303Publication Date (Print):February 1, 1979Publication History Published online1 May 2002Published inissue 1 February 1979https://pubs.acs.org/doi/10.1021/ac50038a037https://doi.org/10.1021/ac50038a037research-articleACS PublicationsRequest reuse permissionsArticle Views22Altmetric-Citations3LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIdentification of elemental sulfur in deep-sea ferromanganese nodulesStephen J. Kirchner, H. Oona, Quintus. Fernando, Jong Hae. Lee, and Harry. ZeitlinCite this: Anal. Chem. 1978, 50, 12, 1701–1702Publication Date (Print):October 1, 1978Publication History Published online1 May 2002Published inissue 1 October 1978https://pubs.acs.org/doi/10.1021/ac50034a033https://doi.org/10.1021/ac50034a033research-articleACS PublicationsRequest reuse permissionsArticle Views51Altmetric-Citations3LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

In this paper high-resolution $K$ x-ray spectra for boron (1 MeV) and neon (90 keV) projectiles moving in solid targets are reported. The x-ray transitions from the moving ions are found to be substantially broadened, compared to gas-target spectral lines. Estimates of the extent of broadening are presented, and physical mechanisms responsible for it are discussed.

Large currents of metallic ions can be extracted from a radio-frequency ion source by fabricating a section of the exit channel from the desired metal.

The equilibrium charge distributions for boron ions after interacting with a carbon foil have been measured for incident particle energies between 0.25 and 1.75 MeV.