Zobrazeno 1 - 10
of 57
pro vyhledávání: '"R.S. Kowalczyk"'
Autor:
Thomas O'Neill, C. E. Jones, Kevin Bailey, W. J. Cummings, J.A. Fedchak, M. Poelker, Haiyan Gao, R. J. Holt, R.S. Kowalczyk
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 417:182-196
We present the results of the first direct measurement of nuclear polarization in an optically pumped spin-exchange polarized deuterium target. Measurements of the nuclear tensor polarization p zz are made in a storage cell as a function of flow of d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3b5769a571ef175a67e014c2cf1cddf
https://doi.org/10.1016/s0168-9002(98)00738-4
https://doi.org/10.1016/s0168-9002(98)00738-4
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 391:405-416
It is necessary to use special coatings on the surfaces of volumes containing polarized atoms in order to minimize depolarizing spin interactions during wall collisions. We are studying coatings of organosilicon compounds that preserve hydrogen and p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99e181636f5f30517c12a89481963c22
https://doi.org/10.1016/s0168-9002(97)00571-8
https://doi.org/10.1016/s0168-9002(97)00571-8
Autor:
D. K. Toporkov, R. J. Holt, K. P. Coulter, M. Poelker, R.S. Kowalczyk, B. Zeidman, Linda Young, C. E. Jones
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 364:58-69
A laser-driven source of spin-polarized hydrogen (H) and deuterium (D) that relies on the technique of optical pumping spin exchange has been constructed. In this source, H or D atoms and potassium atoms flow continuously through a drifilm-coated spi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89cd713c86c7f09d881803ffa7e17485
https://doi.org/10.1016/0168-9002(95)00281-2
https://doi.org/10.1016/0168-9002(95)00281-2
Autor:
I. A. Rachek, D. K. Toporkov, R. J. Holt, E. P. Tsentalovich, B.B. Wojtsekhowski, E. R. Kinney, D. H. Potterveld, A. Sukhanov, A. Zghiche, Linda Young, D. M. Nikolenko, Jim Napolitano, Ronald Gilman, A. B. Temnykh, R.S. Kowalczyk, S. I. Mishnev, L.G. Isaeva, S. G. Popov, K. P. Coulter
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 350:423-429
The first experiment using an active storage cell for polarized atoms to increase the target thickness in an electron storage ring has been performed at the VEPP-3 facility. A clam-shell storage cell, which is opened while injecting electrons into th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9898702a8d9f98c1ee800521beb337b3
https://doi.org/10.1016/0168-9002(94)91243-2
https://doi.org/10.1016/0168-9002(94)91243-2
Autor:
R. J. Holt, D. K. Toporkov, B. Zeidman, Linda Young, M. Poelker, R.S. Kowalczyk, C. E. Jones, K. P. Coulter
Publikováno v:
Physical Review A. 50:2450-2458
The electron polarization of hydrogen (H) and deuterium (D) atoms in a spin-exchange optical-pumping apparatus has been measured as a function of H (D) density and magnetic-field strength. The atomic density was varied between 4\ifmmode\times\else\te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5fca057d2852dc22f701e8eda1354d1
https://doi.org/10.1103/physreva.50.2450
https://doi.org/10.1103/physreva.50.2450
Autor:
Douglas H Beck, R. C. Walker, R. D. McKeown, D. Collins, Jim Napolitano, C. Marchand, Z. E. Meziani, R.S. Kowalczyk, D. F. Geesaman, G. Boyd, Ronald Gilman, B. W. Filippone, E. R. Kinney, R. J. Holt, J. E. Nelson, B. Zeidman, M.C. Green, R. E. Segel, C. E. Jones, R. G. Milner, P. E. Bosted, J. Jourdan, H. E. Jackson, R. C. Minehart, S. J. Freedman, T. Y. Tung, D. H. Potterveld
Publikováno v:
Physical Review C. 48:1864-1878
The differential cross section for the reaction 2H(γ,p)n has been measured at several center-of-mass angles ranging from 50° to 143° for photon energies between 0.8 and 1.8 GeV. The experiment was performed at the SLAC-NPAS facility with the use o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a2670b70da314fb8a552b0a17f8acfc
https://doi.org/10.1103/physrevc.48.1864
https://doi.org/10.1103/physrevc.48.1864
Autor:
E. R. Kinney, Bogdan Wojtsekhowski, D.H. Potterveld, R.S. Kowalczyk, Jim Napolitano, D. K. Toporkov, D. M. Nikolenko, I. A. Rachek, R. J. Holt, A.W. Nikitin, Linda Young, E. P. Tsentalovich, Ronald Gilman, S. G. Popov
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 327:277-286
The first experiment using a storage cell to increase the thickness of an internal polarized gas target in an electron beam storage ring was performed at the VEPP-3 facility. We describe the storage cell technique as applied in this measurement of el
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::441e690c69d32b77c004a138411741df
https://doi.org/10.1016/0168-9002(93)90693-c
https://doi.org/10.1016/0168-9002(93)90693-c
Autor:
A. Zghiche, R.S. Kowalczyk, D. K. Toporkov, B. Zeidman, R. J. Holt, E. R. Kinney, K. P. Coulter, Linda Young, D. H. Potterveld
Publikováno v:
Physical Review Letters. 68:174-177
Optical pumping of potassium atoms followed by spin-exchange scattering with deuterium atoms in a high magnetic field was found to produce an intense, highly spin-polarized beam of atomic deuterium. In particular, the atomic polarization of deuterium
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bdba71931fabda88e4293889c0dd641
https://doi.org/10.1103/physrevlett.68.174
https://doi.org/10.1103/physrevlett.68.174
Autor:
J. P. Schiffer, E. Ungricht, Richard Madey, Daniel Ashery, R. D. McKeown, G. S. Das, D. F. Geesaman, B. Zeidman, J. W. Watson, I. Navon, E. Piasetsky, Murray Moinester, L. C. Smith, G. Garino, G. S. F. Stephans, S. Mukhopadhyay, B. D. Anderson, S. Levenson, R. C. Minehart, R.S. Kowalczyk, R. R. Whitney, R. E. Segel, H. E. Jackson
Publikováno v:
Physical Review C. 43:957-972
Pion absorption by 3He was studied at Tπ=165 MeV in a kinematically complete experiment. The cross section for absorption on a (pn) pair of nucleons, σpn(π+), was found to be 17.0±2.6 mb; that for absorption on a (pp) pair, σpp(π-), 0.91±0.20
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd86b6cdeb3427fa63bc01c15843d1b8
https://doi.org/10.1103/physrevc.43.957
https://doi.org/10.1103/physrevc.43.957
Autor:
A. Yu. Loginov, D. K. Toporkov, I. A. Rachek, Ronald Gilman, S. I. Mishnev, Yu. V. Shestakov, R. Sh. Sadykov, Vladimir Dmitriev, V. V. Vikhrov, A. V. Osipov, Vladimir Nelyubin, L.G. Isaeva, E. R. Kinney, L M Barkov, S. A. Zevakov, M. V. Dyug, S. L. Belostotsky, Hartmuth Arenhövel, H. de Vries, A. A. Sidorov, R.S. Kowalczyk, C. W. de Jager, V. N. Stibunov, D. H. Potterveld, R. J. Holt, D. M. Nikolenko, B. A. Lazarenko
Publikováno v:
Physical Review Letters. 90
The tensor analyzing power components T20 and T21 have been measured in elastic electron-deuteron scattering at the 2 GeV electron storage ring VEPP-3, Novosibirsk, in a four-momentum transfer range from 8.4 to 21.6 fm(-2). A new polarized internal g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68dddad7fc7b3a2d3be4efe4e2655970
https://doi.org/10.1103/physrevlett.90.072501
https://doi.org/10.1103/physrevlett.90.072501