Zobrazeno 1 - 10
of 20
pro vyhledávání: '"D. R. Rich"'
Autor:
Thomas R. Gentile, R. C. Gillis, Timothy Chupp, Michael Gericke, J. D. Bowman, M. Mason, B. Lauss, Kevin P. Coulter, S. A. Page, M. Dabaghyan, W. S. Wilburn, T. B. Smith, F. W. Hersman, Gordon L. Jones, D. R. Rich, S. I. Penttilä, M. Kandes, M. Sharma, W. C. Chen
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 574:500-509
A large area polarized 3He neutron spin filter has been developed and tested in long-term operation. The polarizer cells have area 50 cm2 and larger allowing access to a large area neutron beam. Polarization of 3He up to 57 ± 1 % was measured by mon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a341b8908a29c3e840a86cc04eeb59a
https://doi.org/10.1016/j.nima.2007.02.091
https://doi.org/10.1016/j.nima.2007.02.091
Autor:
V. R. Pomeroy, W. M. Snow, M. Leuschner, D. R. Rich, E. I. Sharapov, J. D. Bowman, S. I. Penttilä, V. W. Yuan, W. S. Wilburn
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 515:563-574
We outline the motivation and conceptual design for a new experiment aimed at a 10-fold improvement in the accuracy of the parity-violating asymmetry A_gamma in the angular distribution of 2.2 MeV gamma rays from the n+p-->d+gamma reaction. This obse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ea8e5470868d2b737ead44893994e91
https://doi.org/10.1016/j.nima.2003.07.010
https://doi.org/10.1016/j.nima.2003.07.010
Autor:
J. D. Bowman, M. Leuschner, J.J. Szymanski, P. P. J. Delheij, W. M. Snow, D. R. Rich, Akira Masaike, Alan K. Thompson, V. W. Yuan, J. N. Knudson, Yasuhiro Masuda, Gordon L. Jones, D. A. Smith, Yuji Matsuda, S. I. Penttilä, C. D. Keith, T. Haseyama, V. R. Pomeroy, Sharon L. Stephenson, Bret E. Crawford, M. A. Espy
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 481:431-453
The capability of performing accurate absolute measurements of neutron beam polarization opens a number of exciting opportunities in fundamental neutron physics and in neutron scattering. At the LANSCE pulsed neutron source we have measured the neutr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ee0d2d9d158cb67d8a4e390ce8035f0
https://doi.org/10.1016/s0168-9002(01)01331-6
https://doi.org/10.1016/s0168-9002(01)01331-6
Autor:
D. R. Rich, Thomas R. Gentile, B. Neff, S. Fan, Gordon L. Jones, Alan K. Thompson, W. M. Snow, Daniel S. Hussey
Publikováno v:
Physica B: Condensed Matter. 305:203-207
Neutron spin filters based on polarized 3 He promise to significantly expand the range of applications of polarized neutron scattering, particularly for experiments with divergent beams. At NIST and at Indiana University, we are pursuing both methods
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d4f2a5137a2fc4ac58a235de372efac
https://doi.org/10.1016/s0921-4526(01)00617-2
https://doi.org/10.1016/s0921-4526(01)00617-2
Publikováno v:
Journal of Research of the National Institute of Standards and Technology
Nuclear spin-polarized (3)He gas at pressures on the order of 100 kPa (1 bar) are required for several applications, such as neutron spin filters and magnetic resonance imaging. The metastability-exchange optical pumping (MEOP) method for polarizing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e59dc5eaba23dc0b45dba99c00973e51
http://europepmc.org/articles/PMC4862822
http://europepmc.org/articles/PMC4862822
Autor:
Gordon L. Jones, A. P. Serebrov, A. Bazhenov, S. I. Penttilä, G. Hansen, K. Morimoto, B. K. Fujikawa, J. D. Bowman, H. Nann, Thomas R. Gentile, D. R. Rich, E. I. Sharapov, Akira Masaike, A. Pirozhkov, V. R. Pomeroy, Stuart J. Freedman, Robert C. Welsh, Fred E. Wietfeldt, Timothy Chupp, Yasuhiro Masuda, M. B. Leuschner, V.W. Yuan, Steve K. Lamoreaux, E. Kolomenski, Yasuyuki Matsuda, W. S. Wilburn, S. Ishimoto, Gary E. Hogan, Christopher Morris, Kevin P. Coulter, T. B. Smith, C. S. Blessinger, D. A. Smith, G. L. Greene, J. N. Knudson, George L. Morgan, J. Zerger, W. M. Snow
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 440:729-735
The weak interaction between neutrons and protons has never been resolved experimentally. In analogy with the strong NN interaction, the weak NN interaction at low energy can be parametrized in terms of a meson exchange model with parity violating me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d60c394a641fc85f8b58bdfcb44ba5b
https://doi.org/10.1016/s0168-9002(99)01071-2
https://doi.org/10.1016/s0168-9002(99)01071-2
Autor:
T. C. Black, Alan K. Thompson, M. Flamini, Thomas R. Gentile, D. R. Rich, X. Fei, Fred E. Wietfeldt, W. M. Snow, Gordon L. Jones, C. D. Keith
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 402:236-240
The goal of this work, which is a collaborative effort between Indiana University, NIST, and Hamilton College, is to extend the technique of polarized neutron scattering into new domains by the development and application of polarized 3He-based neutr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e063e790836f0a09194bb39a63eee757
https://doi.org/10.1016/s0168-9002(97)00841-3
https://doi.org/10.1016/s0168-9002(97)00841-3
Autor:
H. Postma, Sharon L. Stephenson, W. M. Snow, A. Komives, J. N. Knudson, V.W. Yuan, Bret E. Crawford, L. Y. Lowie, P. P. J. Delheij, J. D. Bowman, M. Leuschner, D. R. Rich, Akira Masaike, Yi-Fen Yen, B. Cain, N. R. Roberson, R. D. Hartman, C. D. Keith, S. J. Seestrom, J.J. Szymanski, S. I. Penttilä, Yasuyuki Matsuda, G. E. Mitchell, E. I. Sharapov, T. Haseyama
Publikováno v:
Physical Review C. 53:R2576-R2580
A large parity nonconserving longitudinal analyzing power was discovered in polarized-neutron transmission through Xe. An analyzing power of 4.3\ifmmode\pm\else\textpm\fi{}0.2% was observed in a $p$-wave resonance at ${E}_{n}=3.2$ eV. The measurement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ec95287ee86174ae8dbe3119caf2f26
https://doi.org/10.1103/physrevc.53.r2576
https://doi.org/10.1103/physrevc.53.r2576
Autor:
C S. Bailey, S. G. E. te Velthuis, D. R. Rich, S. Fan, B. Neff, W. M. Snow, Daniel S. Hussey, G. P. Felcher, T. R. Gentile, Alan K. Thompson
Publikováno v:
Applied Physics A: Materials Science & Processing. 74:s234-s236
A polarized 3He neutron-spin filter was used to analyze polarized neutrons reflected from a 1000-A-thick Fe film immersed in a magnetic field. The spin filter analyzed both the specularly reflected component and the off-specular component caused by t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c22ab16bfd7fe46569c7bee3db3a4ed5
https://doi.org/10.1007/s003390201396
https://doi.org/10.1007/s003390201396
Publikováno v:
Applied Physics Letters. 80:2210-2212
Motivated by applications to neutron spin filters and recent advances in spectrally narrowed laser diode arrays (LDAs), we are exploring spin exchange optical pumping of 3He at pressures near 1 bar. Among our more interesting results has been the pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40b39eb698e037634fbbbf580e38a6a5
https://doi.org/10.1063/1.1461424
https://doi.org/10.1063/1.1461424