Zobrazeno 1 - 10
of 71
pro vyhledávání: '"T. S. Stein"'
Autor:
T. S. Stein
Publikováno v:
Annals of vascular surgery. 68
Background Patients with peripheral artery disease and associated intermittent claudication can experience significant short-term (for instance, day-to-day) variations in their walking ability. This variability is often viewed as a complication in es
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3b5bf1ebd59a91ce6991096b74b7427
https://pubmed.ncbi.nlm.nih.gov/32171861
https://pubmed.ncbi.nlm.nih.gov/32171861
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 247:117-122
A new method of spectroscopy PsARS (positronium annihilation ratio spectroscopy) has been developed where ratios are determined of detected coincidence signals resulting from the three γ-ray decay of ortho-Ps to coincidence signals from the two γ d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ca665e405a00126542a9b157294aaaa
https://doi.org/10.1016/j.nimb.2006.01.047
https://doi.org/10.1016/j.nimb.2006.01.047
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 221:48-55
Molecules are fascinating targets for the scattering of incident positrons in that they represent an increased level of complexity over that for atomic targets. Some of the measurements made in our laboratory for total, differential quasielastic, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b02ea9606bc5f7c5ca7a64dc4b28165
https://doi.org/10.1016/j.nimb.2004.03.030
https://doi.org/10.1016/j.nimb.2004.03.030
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 221:134-139
In an effort to measure absolute positronium formation cross-sections for positrons scattered by various target atoms and molecules, we detect coincidences of the two 511 keV γ rays produced by the decay of para-Ps and by the interaction of ortho-Ps
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7565a7ebd6a05b292268481146e2595
https://doi.org/10.1016/j.nimb.2004.03.044
https://doi.org/10.1016/j.nimb.2004.03.044
Publikováno v:
Physical Review A. 60:359-363
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6917c2d3da9c7d5a49e8089003dc6cc1
https://doi.org/10.1103/physreva.60.359
https://doi.org/10.1103/physreva.60.359
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 143:68-80
Recent developments in measurements of total and positronium (Ps) formation cross sections for positrons (in the energy range of 1–300 eV) scattered by hydrogen, alkali metal, and other atoms are reviewed. Measurements and calculations of total and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91d8668ba4556373907ca28b44c1cda0
https://doi.org/10.1016/s0168-583x(98)00214-6
https://doi.org/10.1016/s0168-583x(98)00214-6
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 143:61-67
We have extended our measurements of the relative elastic differential cross sections (DCSs) and positronium formation cross sections (QPss) for positron scattering to include molecules of varying complexity and symmetry. Diffraction effects observed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1e46d052aebbcfed146c4f8560e454f
https://doi.org/10.1016/s0168-583x(97)00936-1
https://doi.org/10.1016/s0168-583x(97)00936-1
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 143:57-60
Relative differential cross-sections (DCS's) have been measured for the quasi-elastic scattering (elastic scattering plus rotational and vibrational excitations) of positrons from CH 4 , N 2 , O 2 , CO, CO 2 , N 2 O, C 2 H 2 , and SF 6 molecules in a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f80eeff0b5d41c750fa22e38f993d6d0
https://doi.org/10.1016/s0168-583x(97)00931-2
https://doi.org/10.1016/s0168-583x(97)00931-2
Publikováno v:
Physical Review A. 55:4244-4247
Relative differential cross sections (DCS's) have been measured for 4 to 200 eV ${\mathrm{e}}^{+}$-${\mathrm{CH}}_{4}$ quasielastic scattering (elastic scattering plus rotational and vibrational excitations) from 30\ifmmode^\circ\else\textdegree\fi{}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::392d42005bab9136f5609618628aaf54
https://doi.org/10.1103/physreva.55.4244
https://doi.org/10.1103/physreva.55.4244
Publikováno v:
Physical Review A. 55:361-368
We have measured total (${\mathrm{Q}}_{\mathrm{T}}$ ) and positronium formation (${\mathrm{Q}}_{\mathrm{Ps}}$ ) cross sections for 1--302-eV positrons (${\mathrm{e}}^{+}$ 's) and ${\mathrm{Q}}_{\mathrm{T}}$ 's for electrons (${\mathrm{e}}^{\mathrm{\e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::022a38fd8d6944e37c9ae98aa4152e1a
https://doi.org/10.1103/physreva.55.361
https://doi.org/10.1103/physreva.55.361