Zobrazeno 1 - 10
of 494
pro vyhledávání: '"Hogan G"'
Autor:
Plaster, B., Adamek, E., Allgeier, B., Anaya, J., Back, H. O., Bagdasarova, Y., Berguno, D. B., Blatnik, M., Boissevain, J. G., Bowles, T. J., Broussard, L. J., Brown, M. A. -P., Carr, R., Clark, D. J., Clayton, S., Cude-Woods, C., Currie, S., Dees, E. B., Ding, X., Du, S., Filippone, B. W., Garcia, A., Geltenbort, P., Hasan, S., Hawari, A., Hickerson, K. P., Hill, R., Hino, M., Hoagland, J., Hoedl, S. A., Hogan, G. E., Hona, B., Hong, R., Holley, A. T., Ito, T. M., Kawai, T., Kirch, K., Kitagaki, S., Knecht, A., Lamoreaux, S. K., Liu, C. -Y., Liu, J., Makela, M., Mammei, R. R., Martin, J. W., Meier, N., Melconian, D., Mendenhall, M. P., Moore, S. D., Morris, C. L., Mortensen, R., Nepal, S., Nouri, N., Pattie, R. W., Galvan, A. Perez, Phillips, D. G., Pichlmaier, A., Picker, R., Pitt, M. L., Ramsey, J. C., Rios, R., Russell, R., Sabourov, K., Sallaska, A. L., Salvat, D. J., Saunders, A., Schmid, R., Seestrom, S. J., Servicky, C., Sharapov, E. I., Sjue, S. K. L., Slutsky, S., Smith, D., Sondheim, W. E., Sun, X., Swank, C., Swift, G., Tatar, E., Teasdale, W., Terai, C., Tipton, B., Utsuro, M., Vogelaar, R. B., VornDick, B., Wang, Z., Wehring, B., Wexler, J., Womack, T., Wrede, C., Xu, Y. P., Yan, H., Young, A. R., Yuan, J., Zeck, B. A.
The UCNA experiment was designed to measure the neutron $\beta$-asymmetry parameter $A_0$ using polarized ultracold neutrons (UCN). UCN produced via downscattering in solid deuterium were polarized via transport through a 7 T magnetic field, and then
Externí odkaz:
http://arxiv.org/abs/1904.05432
Autor:
Sun, X., Adamek, E., Allgeier, B., Blatnik, M., Bowles, T. J., Broussard, L. J., Brown, M. A. -P., Carr, R., Clayton, S., Cude-Woods, C., Currie, S., Dees, E. B., Ding, X., Filippone, B. W., García, A., Geltenbort, P., Hasan, S., Hickerson, K. P., Hoagland, J., Hong, R., Hogan, G. E., Holley, A. T., Ito, T. M., Knecht, A., Liu, C. -Y., Liu, J., Makela, M., Mammei, R., Martin, J. W., Melconian, D., Mendenhall, M. P., Moore, S. D., Morris, C. L., Nepal, S., Nouri, N., Pattie, Jr., R. W., Galván, A. Pérez, Phillips II, D. G., Picker, R., Pitt, M. L., Plaster, B., Ramsey, J. C., Rios, R., Salvat, D. J., Saunders, A., Sondheim, W., Sjue, S., Slutsky, S., Swank, C., Swift, G., Tatar, E., Vogelaar, R. B., VornDick, B., Wang, Z., Wei, W., Wexler, J., Womack, T., Wrede, C., Young, A. R., Zeck, B. A.
Publikováno v:
Phys. Rev. C 97, 052501 (2018)
It has been proposed recently that a previously unobserved neutron decay branch to a dark matter particle ($\chi$) could account for the discrepancy in the neutron lifetime observed in experiments that use two different measurement techniques. One of
Externí odkaz:
http://arxiv.org/abs/1803.10890
Autor:
Brown, M. A. -P., Dees, E. B., Adamek, E., Allgeier, B., Blatnik, M., Bowles, T. J., Broussard, L. J., Carr, R., Clayton, S., Cude-Woods, C., Currie, S., Ding, X., Filippone, B. W., Garcia, A., Geltenbort, P., Hasan, S., Hickerson, K. P., Hoagland, J., Hong, R., Hogan, G. E., Holley, A. T., Ito, T. M., Knecht, A., Liu, C. -Y., Liu, J., Makela, M., Martin, J. W., Melconian, D., Mendenhall, M. P., Moore, S. D., Morris, C. L., Nepal, S., Nouri, N., Pattie, Jr., R. W., Perez-Galvan, A., Phillips II, D. G., Picker, R., Pitt, M. L., Plaster, B., Ramsey, J. C., Rios, R., Salvat, D. J., Saunders, A., Sondheim, W., Seestrom, S. J., Sjue, S., Slutsky, S., Sun, X., Swank, C., Swift, G., Tatar, E., Vogelaar, R. B., VornDick, B., Wang, Z., Wexler, J., Womack, T., Wrede, C., Young, A. R., Zeck, B. A.
Publikováno v:
Phys. Rev. C 97, 035505 (2018)
The neutron $\beta$-decay asymmetry parameter $A_0$ defines the correlation between the spin of the neutron and the momentum of the emitted electron, which determines $\lambda=\frac{g_{A}}{g_{V}}$, the ratio of the axial-vector to vector weak couplin
Externí odkaz:
http://arxiv.org/abs/1712.00884
Autor:
Sharapov, E. I., Morris, C. L., Makela, M., Saunders, A., Adamek, Evan R., Broussard, L. J., Cude-Woods, C. B., Fellers, Deion E, Geltenbort, Peter, Hartl, M., Hasan, S. I., Hickerson, K. P., Hogan, G., Holley, A. T., Lavelle, C. M., Liu, Chen-Yu, Mendenhall, M. P., Ortiz, J., Pattie Jr., R. W., Ramsey, J., Salvat, D. J., Seestrom, S. J., Shaw, E., Sjue, Sky, Sondheim, W. E., VornDick, B., Wang, Z., Womack, T. L., Young, A. R., Zeck, Bryan A., Phillips, D. G.
Publikováno v:
Phys. Rev. C 88, 064605 (2013)
It is generally accepted that the main cause of ultracold neutron (UCN) losses in storage traps is the upscattering to the thermal energy range by hydrogen adsorbed on the surface of the trap walls. However, the data on which this conclusion is based
Externí odkaz:
http://arxiv.org/abs/1308.2710
Autor:
Sharapov, E. I., Morris, C. L., Makela, M., Saunders, A., Adamek, Evan R., Bagdasarova, Yelena, Broussard, L. J., Cude-Woods, C. B., Fellers, Deon E, Geltenbort, Peter, Hasan, S. I., Hickerson, K. P., Hogan, G., Holley, A. T., Liu, Chen-Yu, Mendenhall, M. P., Ortiz, J., Pattie Jr., R. W., Phillips, D. G., Ramsey, J., Salvat, D. J., Seestrom, S. J., Shaw, E., Sjue, Sky, Sondheim, W. E., VornDick, B., Wang, Z., Womack, T. L., Young, A. R., Zeck, B. A.
The study of neutron cross sections for elements used as efficient ``absorbers'' of ultracold neutrons (UCN) is crucial for many precision experiments in nuclear and particle physics, cosmology and gravity. In this context, ``absorption'' includes bo
Externí odkaz:
http://arxiv.org/abs/1306.1261
Autor:
UCNA Collaboration, Plaster, B., Rios, R., Back, H. O., Bowles, T. J., Broussard, L. J., Carr, R., Clayton, S., Currie, S., Filippone, B. W., Garcia, A., Geltenbort, P., Hickerson, K. P., Hoagland, J., Hogan, G. E., Hona, B., Holley, A. T., Ito, T. M., Liu, C. -Y., Liu, J., Makela, M., Mammei, R. R., Martin, J. W., Melconian, D., Mendenhall, M. P., Morris, C. L., Mortensen, R., Pattie, Jr., R. W., Galvan, A. Perez, Pitt, M. L., Ramsey, J. C., Russell, R., Saunders, A., Schmid, R., Seestrom, S. J., Sjue, S., Sondheim, W. E., Tatar, E., Tipton, B., Vogelaar, R. B., VornDick, B., Wrede, C., Xu, Y. P., Yan, H., Young, A. R., Yuan, J.
We present a detailed report of a measurement of the neutron $\beta$-asymmetry parameter $A_0$, the parity-violating angular correlation between the neutron spin and the decay electron momentum, performed with polarized ultracold neutrons (UCN). UCN
Externí odkaz:
http://arxiv.org/abs/1207.5887
Autor:
UCNA Collaboration, Liu, J., Mendenhall, M. P., Holley, A. T., Back, H. O., Bowles, T. J., Broussard, L. J., Carr, R., Clayton, S., Currie, S., Filippone, B. W., Garcia, A., Geltenbort, P., Hickerson, K. P., Hoagland, J., Hogan, G. E., Hona, B., Ito, T. M., Liu, C. -Y., Makela, M., Mammei, R. R., Martin, J. W., Melconian, D., Morris, C. L., Pattie Jr., R. W., Galvan, A. Perez, Pitt, M. L., Plaster, B., Ramsey, J. C., Rios, R., Russell, R., Saunders, A., Seestrom, S. J., Sondheim, W. E., Tatar, E., Vogelaar, R. B., VornDick, B., Wrede, C., Yan, H., Young, A. R.
Publikováno v:
Phys.Rev.Lett.105:181803,2010
A precise measurement of the neutron decay $\beta$-asymmetry $A_0$ has been carried out using polarized ultracold neutrons (UCN) from the pulsed spallation UCN source at the Los Alamos Neutron Science Center (LANSCE). Combining data obtained in 2008
Externí odkaz:
http://arxiv.org/abs/1007.3790
Autor:
Takács, D., Hogan, G. Stépán. S. J.
This study investigates a low degree-of-freedom (DoF) mechanical model of shimmying wheels. The model is studied using bifurcation theory and numerical continuation. Self-excited vibrations, that is, stable and unstable periodic motions of the wheel,
Externí odkaz:
http://arxiv.org/abs/0711.2228
Autor:
Saunders, A., Anaya, J. M., Bowles, T. J., Filippone, B. W., Geltenbort, P., Hill, R. E., Hino, M., Hoedl, S., Hogan, G. E., Ito, T. M., Jones, K. W., Kawai, T., Kirch, K., Lamoreaux, S. K., Liu, C. -Y., Makela, M., Marek, L. J., Martin, J. W., Morris, C. L., Mortensen, R. N., Pichlmaier, A., Seestrom, S. J., Serebrov, A., Smith, D., Teasdale, W., Tipton, B., Vogelaar, R. B., Young, A. R., Yuan, J.
Publikováno v:
Phys.Lett.B593:55-60,2004
Ultra-cold neutrons (UCN), neutrons with energies low enough to be confined by the Fermi potential in material bottles, are playing an increasing role in measurements of fundamental properties of the neutron. The ability to manipulate UCN with materi
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0312021
Autor:
Morris, C. L., Anaya, J. M., Bowles, T. J., Filippone, B. W., Geltenbort, P., Hill, R. E., Hino, M., Hoedl, S., Hogan, G. E., Ito, T. M., Kawai, T., Kirch, K., Lamoreaux, S. K., Liu, C. -Y., Makela, M., Marek, L. J., Martin, J. W., Mortensen, R. N., Pichlmaier, A., Saunders, A., Seestrom, S. J., Smith, D., Teasdale, W., Tipton, B., Utsuro, M., Young, A. R., Yuan, J.
Publikováno v:
Phys.Rev.Lett.89:272501,2002
We present the first measurements of the survival time of ultracold neutrons (UCNs) in solid deuterium SD2. This critical parameter provides a fundamental limitation to the effectiveness of superthermal UCN sources that utilize solid ortho-deuterium
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0109020