Zobrazeno 1 - 10
of 16
pro vyhledávání: '"S. H. M. Deng"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 248:121-126
A single component plasma confined in a Penning–Malmberg trap may be released in a controlled manner by regulating the rate at which one of the confining (gate) potentials is dropped. A close inspection of the emission profiles of such plasmas has
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8d134e0a537e6f9b67025cf69c77dcf
https://doi.org/10.1016/j.nimb.2006.04.064
https://doi.org/10.1016/j.nimb.2006.04.064
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 553:550-558
BaF 2 is a common scintillator material used for the detection of gamma radiation due to its relatively high stopping power, radiation hardness and high luminescence. BaF 2 is often used in gamma ray timing experiments because of the prompt decay com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5286b942984716798d035282cac98e82
https://doi.org/10.1016/j.nima.2005.07.022
https://doi.org/10.1016/j.nima.2005.07.022
Publikováno v:
Applied Surface Science. 253:9467-9469
The sticking coefficient of nitrogen gas on a thick solid nitrogen film on a copper cold finger was studied at low temperature. For surface temperatures of about 12 K the sticking coefficient is measured to be 99.0 ± 0.6%. Our result implies that it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd527e0dfcc6505dadd8b8ffe5704332
https://doi.org/10.1016/j.apsusc.2007.06.025
https://doi.org/10.1016/j.apsusc.2007.06.025
Autor:
Mark E. Bannister, C. R. Vane, Vitali Zhaunerchyk, Michael Fogle, E. M. Bahati, Richard D. Thomas, S. H. M. Deng
Publikováno v:
Physical Review A. 84
Absolute cross sections for electron-impact dissociation of N${}_{2}$D${}^{+}$ producing N${}_{2}^{+}$, ND${}^{+}$, and N${}^{+}$ ion fragments were measured in the 5- to 100-eV range using a crossed electron-ion beams technique. In the 5- to 20-eV r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb1d8db66c81656298a76d42bbdccf71
https://doi.org/10.1103/physreva.84.032714
https://doi.org/10.1103/physreva.84.032714
Publikováno v:
Physical Review A. 82
Absolute cross sections for electron-impact dissociation of O3+ ions yielding O+ and O2+ fragment ions have been measured using a crossed electron-ion beams method for energies from about 3 eV to 100 eV. While the O2+ channel dominates the dissociati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3748dc051be02d171c951030ae4ed282
https://doi.org/10.1103/physreva.82.062715
https://doi.org/10.1103/physreva.82.062715
Autor:
Mark E. Bannister, Richard D. Thomas, Vitali Zhaunerchyk, Michael Fogle, S. H. M. Deng, C. R. Vane, E. M. Bahati
Publikováno v:
Physical Review A. 82
Absolute cross sections for electron-impact dissociation of XH{sub 2}{sup +} (X= B, C, N, O, F) producing XH{sup +} and X{sup +} ion fragments were measured in the 3- to 100-eV range using a crossed-electron-ion beams technique. Dissociative excitati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb8a4342f34bc257921c228eed98db64
https://doi.org/10.1103/physreva.82.042720
https://doi.org/10.1103/physreva.82.042720
Autor:
D. B. Cassidy, R. G. Greaves, S. H. M. Deng, N. Lopez-Valdez, V. Meligne, A. P. Mills, Floyd D. McDaniel, Barney L. Doyle
Publikováno v:
AIP Conference Proceedings.
Positrons have the potential to be extremely useful probes of solid state and atomic systems, but this potential is far from being realised because antimatter is not readily available. The most common source of positrons used in laboratories utilises
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da45fb586e7832210d653064f612ed53
https://doi.org/10.1063/1.3120176
https://doi.org/10.1063/1.3120176
Publikováno v:
Physical Review A. 76
We have observed a reduction in the amount of positronium emitted from an atomically clean Al(111) surface that depends on the incident positron beam density. We interpret this as evidence for the formation of molecular positronium, created following
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68cba2c6b03d2bcecaa89a9e3bfc89d0
https://doi.org/10.1103/physreva.76.062511
https://doi.org/10.1103/physreva.76.062511
Autor:
H. Miyadera, D. L. Griscom, David Cassidy, Harry W. K. Tom, K. T. Yokoyama, Chandra Varma, S. H. M. Deng, Allen P. Mills
Publikováno v:
Physical Review B. 75
A laser-pump, positron-probe technique has been developed for measuring the dynamics of laser-induced paramagnetic centers in porous materials. The basis of the technique is the fact that the annihilation rate of ortho-positronium may increase in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14d8c3f5fcd0566db7ae7193db633f26
https://doi.org/10.1103/physrevb.75.085415
https://doi.org/10.1103/physrevb.75.085415
Autor:
Norikazu Nishiyama, Hiroyuki Tanaka, David Cassidy, J. B. Snyder, R. G. Greaves, Allen P. Mills, T. Maruo, S. H. M. Deng
Publikováno v:
Physical Review Letters. 95
We have created a high-density gas of interacting positronium (Ps) atoms by irradiating a thin film of nanoporous silica with intense positron bursts and measured the Ps lifetime using a new single-shot technique. When the positrons were compressed t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3baecc890a6eca03a5dac60c3107fbeb
https://doi.org/10.1103/physrevlett.95.195006
https://doi.org/10.1103/physrevlett.95.195006