Zobrazeno 1 - 10
of 99
pro vyhledávání: '"J. Moxom"'
Autor:
A. C. L. Jones, J. Moxom, M. Fuentes-Garcia, G. G. Cecchini, E. E. Membreno, E. E. Roeder, A. P. Mills
Publikováno v:
Review of Scientific Instruments. 93:013305
We describe here the development and characterization of a position-sensitive detector for Rydberg atom experiments. The detector builds on an earlier design that field-ionized incident Rydberg positronium (Ps) atoms and then electrostatically focuse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64d448f9b7860f2d9f6b420400ca358d
https://doi.org/10.1063/5.0077037
https://doi.org/10.1063/5.0077037
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 579:534-537
An intense positron beam, for application in nanophase characterization, is now under construction at the 1 MW PULSTAR nuclear reactor at North Carolina State University (NCSU). A tungsten converter/moderator is used, allowing positrons to be emitted
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::582f813df0c4666c6a8009166000ff9e
https://doi.org/10.1016/j.nima.2007.04.117
https://doi.org/10.1016/j.nima.2007.04.117
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 38:3857-3866
Detailed measurements of the total ionization cross-section by positron impact on He from threshold up to 850 eV are reported. Both the present total ionization cross-section and the direct ionization cross-section of Moxom et al (1996) and Ashley et
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de5fa54e098aba1f04f855268c58d68d
https://doi.org/10.1088/0953-4075/38/21/008
https://doi.org/10.1088/0953-4075/38/21/008
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 35:2525-2540
Detailed measurements of the total ionization cross-sections for Ne, Ar, Kr and Xe by positron impact are presented in the energy range from threshold up to ~1 keV. From these and other available data, the cross-sections for positronium formation are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::baf75b4fd6aae39a2c7d2cc8db669967
https://doi.org/10.1088/0953-4075/35/11/311
https://doi.org/10.1088/0953-4075/35/11/311
Autor:
J Moxom
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 33:L481-L485
New data for double, triple and quadruple ionization of Xe at impact energies up to 400 eV are presented. The contribution to the total triple ionization cross section from ionization with positronium formation, below the threshold for direct ionizat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed65b4d98ca0cdbe201541255c7dfaec
https://doi.org/10.1088/0953-4075/33/13/102
https://doi.org/10.1088/0953-4075/33/13/102
Publikováno v:
Physical Review A. 60:2940-2943
The cross sections for double ionization and the ratios of double to single ionization, including Ps formation for Ne, Ar, Kr, and Xe are presented from threshold to 100 eV. Within the energy region 6.8 eV below the second ionization potential, i.e.,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d86dca6ee6de111c6682bb5d294a765d
https://doi.org/10.1103/physreva.60.2940
https://doi.org/10.1103/physreva.60.2940
Publikováno v:
Applied Surface Science. 149:244-247
The yields of positive ionic fragments produced by positron impact from CH3Cl have been studied in the energy range from threshold to 50 eV. The interactions take place whilst the positrons are stored in a Penning trap and the ions are detected using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d7d2abe0a63c235fd7dd1f8ca70e0be
https://doi.org/10.1016/s0169-4332(99)00209-3
https://doi.org/10.1016/s0169-4332(99)00209-3
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 143:184-187
The details of an electrostatic beam, designed for investigating positron–atom (molecule) scattering processes, are presented. The performance of the system has been tested by measuring differential elastic e + –Ar scattering cross sections. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79623da5b7464bc9da50dade0f874d74
https://doi.org/10.1016/s0168-583x(98)00245-6
https://doi.org/10.1016/s0168-583x(98)00245-6
Autor:
David M. Schrader, T. A. Lewis, Jun Xu, B. Somieski, J. Moxom, Y. Kobayashi, G. Laricchia, Lester D. Hulett
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 143:112-120
New data for the fragmentation of CH3F by low energy e+ using an improved spectrometer are presented. The positively charged fragment ions are detected and mass analyzed using a time-of-flight mass spectrometer and the ion yields are measured as a fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed1c7100b52ba6e354621a6b4b6b0169
https://doi.org/10.1016/s0168-583x(98)00205-5
https://doi.org/10.1016/s0168-583x(98)00205-5
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 143:94-99
Experimental data are presented for the single (σ+i) and the ratio of double to single (R2) ionisation cross sections for e+ impact on Ne, Kr and Xe from near threshold to 1000 eV. The ratio between e+ and e− σ+i maxima was generally seen to be l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c71870413e5e73c1b8036f1df1ec59f3
https://doi.org/10.1016/s0168-583x(97)00930-0
https://doi.org/10.1016/s0168-583x(97)00930-0