Zobrazeno 1 - 10
of 13
pro vyhledávání: '"D. R. Ermer"'
Publikováno v:
Applied Surface Science. :213-216
We demonstrate that organic molecules embedded in sodium nitrate crystallites can be desorbed and detected as charged species using a picosecond, mid-infrared laser tuned to excite a nitrate stretching mode. We also detected all components of a mixtu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93eb38e686a3c75bff1375bf22f168e5
https://doi.org/10.1016/s0169-4332(02)00366-5
https://doi.org/10.1016/s0169-4332(02)00366-5
Publikováno v:
Journal of Applied Physics. 87:1522-1528
Wide band gap insulators irradiated with UV pulsed lasers have been shown to yield both photoinduced electrons and energetic positive ions suggesting occupied electronic states in the band gap. It is not obvious that similar experiments with near-IR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79531c0629aea27d972a014573de0fa2
https://doi.org/10.1063/1.372043
https://doi.org/10.1063/1.372043
Publikováno v:
Applied Surface Science. :7-20
In the use of high-intensity lasers in chemical analysis and materials processing, the formation of an ablation plume is of high importance. For wide bandgap insulators (e.g., oxides, halides, nitrides, carbides) irradiated with sub-bandgap photon en
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41244097f4eb533b94844f31fdff821e
https://doi.org/10.1016/s0169-4332(97)00605-3
https://doi.org/10.1016/s0169-4332(97)00605-3
Publikováno v:
Applied Surface Science. :977-982
We describe the expansion dynamics of the tenuous plasmas formed by irradiating single crystal MgO with a KrF excimer laser (248 nm) in vacuum. At low fluences (0.03–0.5 J/cm 2 ), the positive ion kinetic energy distribution peaks at about 11 eV an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::751a49eda5fa742d26600497f7acc9a8
https://doi.org/10.1016/s0169-4332(97)00777-0
https://doi.org/10.1016/s0169-4332(97)00777-0
Publikováno v:
Journal of Applied Physics. 81:1495-1504
We examine the formation of a fluorescent plume during pulsed laser irradiation of wide band gap materials at sub-band gap photon energies. We show that fluences near the threshold for plume fluorescence in MgO do not produce adequate electron densit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d37c5af9e9b6e857f84d50c5601b5eb
https://doi.org/10.1063/1.364183
https://doi.org/10.1063/1.364183
Publikováno v:
The Review of Laser Engineering. 25:267-277
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::babd3b59990f255baf0d2e8a95732ca8
https://doi.org/10.2184/lsj.25.267
https://doi.org/10.2184/lsj.25.267
Publikováno v:
Applied Physics A: Materials Science & Processing. 64:7-17
Visible fluorescent “plumes” are readily produced when nominally transparent ionic materials are exposed to pulsed UV laser irradiation. Over a wide range of laser fluences where plumes are observed, however, the photon and electron densities are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5f4f36f52da82265162ba2adf1a30f8
https://doi.org/10.1007/s003390050438
https://doi.org/10.1007/s003390050438
Publikováno v:
Journal of Applied Physics. 80:6452-6466
We report quadrupole mass‐selected, time‐of‐flight measurements of Mg+ from polished, single crystal MgO and Na+ from cleaved, single crystal NaNO3 exposed to 248 nm (5 eV) laser radiation. A large fraction of the ions emitted from these materi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c6022244454afc3d68da3fc3f2f6eb9
https://doi.org/10.1063/1.363665
https://doi.org/10.1063/1.363665
Publikováno v:
Applied Physics A. 70:633-635
Photon energy can be deposited efficiently into an exceedingly small volume by using a laser tuned to a vibrational resonance of the material. Both calcite and silica have absorption depths of a few tenths micron at the asymmetric carbonate stretch (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::767100c4941674c7647284fa9ef1f2b3
https://doi.org/10.1007/pl00021072
https://doi.org/10.1007/pl00021072
Publikováno v:
Journal of mass spectrometry : JMS. 36(5)
The mechanisms responsible for matrix-assisted laser desorption/ionization (MALDI) are far from being well understood, particularly where infrared laser irradiation is used to initiate the process. We measured the emission yields and kinetic energy d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fc67d09df14f14b80e0d235e89c7912
https://pubmed.ncbi.nlm.nih.gov/11391810
https://pubmed.ncbi.nlm.nih.gov/11391810