Characterization of electroless nickel-phosphorus plating for ultracold-neutron storage

Autor: Akatsuka, H., Andalib, T., Bell, B., Berean-Dutcher, J., Bernier, N., Bidinosti, C. P., Cude-Woods, C., Currie, S. A., Davis, C. A., Franke, B., Gaur, R., Giampa, P., Hansen-Romu, S., Hassan, M. T., Hatanaka, K., Higuchi, T., Gibson, C., Ichikawa, G., Ide, I., Imajo, S., Ito, T. M., Jamieson, B., Kawasaki, S., Kitaguchi, M., Klassen, W., Korkmaz, E., Kuchler, F., Lang, M., Lavvaf, M., Lindner, T., Makela, M., Mammei, J., Mammei, R., Martin, J. W., Matsumiya, R., Miller, E., Mishima, K., Momose, T., Morawetz, S., Morris, C. L., Ong, H. J., O'Shaughnessy, C. M., Pereira-Wilson, M., Picker, R., Piermaier, F., Pierre, E., Schreyer, W., Sidhu, S., Stang, D., Tiepo, V., Vanbergen, S., Wang, R., Wong, D., Yamamoto, N.

Publikováno v: Nucl. Instrum. Methods Phys. Res. A 1049 (2023) 168106

Electroless nickel plating is an established industrial process that provides a robust and relatively low-cost coating suitable for transporting and storing ultracold neutrons (UCN). Using roughness measurements and UCN-storage experiments we charact

Externí odkaz: http://arxiv.org/abs/2208.05590

Improved limits on Fierz Interference using asymmetry measurements from the UCNA experiment

Autor: Sun, Xuan, Adamek, E., Allgeier, B., Bagdasarova, Y., Berguno, D. 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., 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., Salvat, D. J., Saunders, A., Sharapov, E. I., Sjue, S., Slutsky, S., Sondheim, W., Swank, C., Tatar, E., Vogelaar, R. B., VornDick, B., Wang, Z., Wei, W., Wexler, J. W., Womack, T., Wrede, C., Young, A. R., Zeck, B. A.

Publikováno v: Phys. Rev. C 101, 035503 (2020)

The Ultracold Neutron Asymmetry (UCNA) experiment was designed to measure the $\beta$-decay asymmetry parameter, $A_0$, for free neutron decay. In the experiment, polarized ultracold neutrons are transported into a decay trap, and their $\beta$-decay

Externí odkaz: http://arxiv.org/abs/1911.05829

Final results for the neutron $\beta$-asymmetry parameter $A_0$ from the UCNA experiment

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

The Nab Experiment: A Precision Measurement of Unpolarized Neutron Beta Decay

Autor: Fry, J., Alarcon, R., Baessler, S., Balascuta, S., Barron-Palos, L., Bailey, T., Bass, K., Birge, N., Blose, A., Borissenko, D., Bowman, J. D., Broussard, L. J., Bryant, A. T., Byrne, J., Calarco, J. R., Caylor, J., Chang, K., Chupp, T., Cianciolo, T. V., Crawford, C., Ding, X., Doyle, M., Fan, W., Farrar, W., Fomin, N., Frlez, E., Gericke, M. T., Gervais, M., Gluck, F., Greene, G. L., Grzywacz, R. K., Gudkov, V., Hamblen, J., Hayes, C., Hendrus, C., Ito, T., Jezghani, A., Li, H., Makela, M., Macsai, N., Mammei, J., Mammei, R., Martinez, M., Mathews, D. G., McCrea, M., McGaughey, P., McLaughlin, C. D., Mueller, P., van Petten, D., Penttila, S. I., Perryman, D. E., Picker, R., Pierce, J., Pocanic, D., Qian, Y., Ramsey, J., Randall, G., Riley, G., Rykaczewski, K. P., Salas-Bacci, A., Samiei, S., Scott, E. M., Shelton, T., Sjue, S. K., Smith, A., Smith, E., Stevens, E., Wexler, J., Whitehead, R., Wilburn, W. S., Young, A., Zeck, B.

Neutron beta decay is one of the most fundamental processes in nuclear physics and provides sensitive means to uncover the details of the weak interaction. Neutron beta decay can evaluate the ratio of axial-vector to vector coupling constants in the

Externí odkaz: http://arxiv.org/abs/1811.10047

First ultracold neutrons produced at TRIUMF

Autor: Ahmed, S., Altiere, E., Andalib, T., Bell, B., Bidinosti, C. P., Cudmore, E., Das, M., Davis, C. A., Franke, B., Gericke, M., Giampa, P., Gnyp, P., Hansen-Romu, S., Hatanaka, K., Hayamizu, T., Jamieson, B., Jones, D., Kawasaki, S., Kikawa, T., Kitaguchi, M., Klassen, W., Konaka, A., Korkmaz, E., Kuchler, F., Lang, M., Lee, L., Lindner, T., Madison, K. W., Makida, Y., Mammei, J., Mammei, R., Martin, J. W., Matsumiya, R., Miller, E., Mishima, K., Momose, T., Okamura, T., Page, S., Picker, R., Pierre, E., Ramsay, W. D., Rebenitsch, L., Rehm, F., Schreyer, W., Shimizu, H. M., Sidhu, S., Sikora, A., Smith, J., Tanihata, I., Thorsteinson, B., Vanbergen, S., van Oers, W. T. H., Watanabe, Y. X.

Publikováno v: Phys. Rev. C 99, 025503 (2019)

We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter cooled to 0.9$\,$K. During an extensive test campaign in November 2017,

Externí odkaz: http://arxiv.org/abs/1809.04071