Zobrazeno 1 - 10
of 201
pro vyhledávání: '"Callahan N"'
Autor:
Blatnik, M. F., Blokland, L. S., Callahan, N., Choi, J. H., Clayton, S., Cude-Woods, C. B, Filippone, B. W., Fox, W. R., Fries, E., Geltenbort, P., Gonzalez, F. M., Hayen, L., Hickerson, K. P., Holley, A. T., Ito, T. M., Komives, A., Lin, S, Liu, Chen-Yu, Makela, M. F., Morris, C. L., Musedinovic, R., O'Shaughnessy, C. M., Pattie Jr., R. W., Ramsey, J. C., Salvat, D. J., Saunders, A., Seestrom, S. J., Sharapov, E. I., Singh, M., Tang, Z., Uhrich, W. F., Vanderwerp, J., Walstrom, P., Wang, Z., Young, A. R.
The past two decades have yielded several new measurements and reanalysis of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing
Externí odkaz:
http://arxiv.org/abs/2406.10378
Autor:
Valverde, A. A., Kondev, F. G., Liu, B., Ray, D., Brodeur, M., Burdette, D. P., Callahan, N., Cannon, A., Clark, J. A., Hoff, D. E. M., Orford, R., Porter, W. S., Sharma, K. S., Varriano, L.
We report precision mass measurements of $^{133}$Sb, $^{133g,m}$Te, and $^{133g,m}$I, produced at CARIBU at Argonne National Laboratory's ATLAS facility and measured using the Canadian Penning Trap mass spectrometer. These masses clarify an anomaly i
Externí odkaz:
http://arxiv.org/abs/2312.06903
Autor:
Varriano, L., Savard, G., Clark, J. A., Burdette, D. P., Burkey, M. T., Gallant, A. T., Hirsh, T. Y., Longfellow, B., Scielzo, N. D., Segel, R., Boron III, E. J., Brodeur, M., Callahan, N., Cannon, A., Kolos, K., Liu, B., Lopez-Caceres, S., Gott, M., Maaß, B., Marley, S. T., Mohs, C., Morgan, G. E., Mueller, P., Oberling, M., O'Malley, P. D., Porter, W. S., Purcell, Z., Ray, D., Rivero, F., Valverde, A. A., Wilson, G. L., Zite, R.
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1058, 168818 (2024)
The Beta-decay Paul Trap is an open-geometry, linear trap used to measure the decays of $^8$Li and $^8$B to search for a tensor contribution to the weak interaction. In the latest $^8$Li measurement of Burkey et al. (2022), $\beta$ scattering was the
Externí odkaz:
http://arxiv.org/abs/2311.00723
Autor:
Cude-Woods, C., Gonzalez, F. M., Fries, E. M., Bailey, T., Blatnik, M., Callahan, N. B., Choi, J. H., Clayton, S. M., Currie, S. A., Dawid, M., Filippone, B. W., Fox, W., Geltenbort, P., George, E., Hayen, L., Hickerson, K. P., Hoffbauer, M. A., Hoffman, K., Holley, A. T., Ito, T. M., Komives, A., Liu, C. -Y., Makela, M., Morris, C. L., Musedinovic, R., O'Shaughnessy, C., Pattie, Jr., R. W., Ramsey, J., Salvat, D. J., Saunders, A., Sharapov, 5 E. I., Slutsky, S., Su, V., Sun, X., Swank, C., Tang, Z., Uhrich, W., Vanderwerp, J., Walstrom, P., Wang, Z., Wei, W., Young, A. R.
The past two decades have yielded several new measurements and reanalyses of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing
Externí odkaz:
http://arxiv.org/abs/2205.02323
Autor:
Gonzalez, F. M., Fries, E. M., Cude-Woods, C., Bailey, T., Blatnik, M., Broussard, L. J., Callahan, N. B., Choi, J. H., Clayton, S. M., Currie, S. A., Dawid, M., Dees, E. B., Filippone, B. W., Fox, W., Geltenbort, P., George, E., Hayen, L., Hickerson, K. P., Hoffbauer, M. A., Hoffman, K., Holley, A. T., Ito, T. M., Komives, A., Liu, C. -Y., Makela, M., Morris, C. L., Musedinovic, R., O'Shaughnessy, C., Pattie, Jr., R. W., Ramsey, J., Salvat, D. J., Saunders, A., Sharapov, E. I., Slutsky, S., Su, V., Sun, X., Swank, C., Tang, Z., Uhrich, W., Vanderwerp, J., Walstrom, P., Wang, Z., Wei, W., Young, A. R.
We report an improved measurement of the free neutron lifetime $\tau_{n}$ using the UCN$\tau$ apparatus at the Los Alamos Neutron Science Center. We counted a total of approximately $38\times10^{6}$ surviving ultracold neutrons (UCN) after storing in
Externí odkaz:
http://arxiv.org/abs/2106.10375
Autor:
Varriano, L., Savard, G., Clark, J.A., Burdette, D.P., Burkey, M.T., Gallant, A.T., Hirsh, T.Y., Longfellow, B., Scielzo, N.D., Segel, R., Boron, E.J., III, Brodeur, M., Callahan, N., Cannon, A., Kolos, K., Liu, B., Lopez-Caceres, S., Gott, M., Maaß, B., Marley, S.T., Mohs, C., Morgan, G.E., Mueller, P., Oberling, M., O’Malley, P.D., Porter, W.S., Purcell, Z., Ray, D., Rivero, F., Valverde, A.A., Wilson, G.L., Zite, R.
Publikováno v:
In Nuclear Inst. and Methods in Physics Research, A January 2024 1058
Autor:
Kuk, K., Cude-Woods, C., Chavez, C. R., Choi, J. H., Estrada, J., Hoffbauer, M., Makela, M., Merkel, P., Morris, C. L., Ramberg, E., Wang, Z., Bailey, T., Blatnik, M., Adamek, E. R., Broussard, L. J., Brown, M. A. -P., Callahan, N. B., Clayton, S. M., Currie, S. A., Ding, X., Dinger, D., Filippone, B., Fries, E. M., Geltenbort, P., George, E., Gonzalez, F., Hickerson, K. P., Hoffman, K., Holley, A. T., Ito, T. M., MacDonald, S. W. T., Liu, C. -Y., O'Shaughnessy, C., Pattie, Jr., R. W., Phillips II, D. G., Plaster, B., Salvat, D. J., Saunders, A., Seestrom, S., Sharapov, E. I., Sjue, S. K. L., Su, V., Sun, X., Tang, Z., Walstrom, P. L., Wei, W., Wexler, J. W., Womack, T. L., Young, A. R., Zeck, B. A., collaboration, UCN
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A, Volume 1003, 1 July 2021, 165306
A new boron-coated CCD camera is described for direct detection of ultracold neutrons (UCN) through the capture reactions $^{10}$B (n,$\alpha$0$\gamma$)$^7$Li (6%) and $^{10}$B(n,$\alpha$1$\gamma$)$^7$Li (94%). The experiments, which extend earlier w
Externí odkaz:
http://arxiv.org/abs/1903.01335
Autor:
Ito, T. M., Adamek, E. R., Callahan, N. B., Choi, J. H., Clayton, S. M., Cude-Woods, C., Currie, S., Ding, X., Fellers, D. E., Geltenbort, P., Lamoreaux, S. K., Liu, C. Y., MacDonald, S., Makela, M., Morris, C. L., Pattie Jr., R. W., Ramsey, J. C., Salvat, D. J., Saunders, A., Sharapov, E. I., Sjue, S., Sprow, A. P., Tang, Z., Weaver, H. L., Wei, W., Young, A. R.
Publikováno v:
Phys. Rev. C 97, 012501 (2018)
The ultracold neutron (UCN) source at Los Alamos National Laboratory (LANL), which uses solid deuterium as the UCN converter and is driven by accelerator spallation neutrons, has been successfully operated for over 10 years, providing UCN to various
Externí odkaz:
http://arxiv.org/abs/1710.05182
Autor:
Pattie Jr., R. W., Callahan, N. B., Cude-Woods, C., Adamek, E. R., Broussard, L. J., Clayton, S. M., Currie, S. A., Dees, E. B., Ding, X., Engel, E. M., Fellers, D. E., Fox, W., Hickerson, K. P., Hoffbauer, M. A., Holley, A. T., Komives, A., Liu, C. -Y., MacDonald, S. W. T., Makela, M., Morris, C. L., Ortiz, J. D., Ramsey, J., Salvat, D. J., Saunders, A., Seestrom, S. J., Sharapov, E. I., Sjue, S. K., Tang, Z., Vanderwerp, J., Vogelaar, B., Walstrom, P. L., Wang, Z., Wei, W., Weaver, H. L., Wexler, J. W., Womack, T. L., Young, A. R., Zeck, B. A.
The precise value of the mean neutron lifetime, $\tau_n$, plays an important role in nuclear and particle physics and cosmology. It is a key input for predicting the ratio of protons to helium atoms in the primordial universe and is used to search fo
Externí odkaz:
http://arxiv.org/abs/1707.01817
Autor:
Pattie Jr, R. W., Adamek, E., Brenner, T., Brandt, A., Broussard, L. J., Callahan, N. B., Clayton, S. M., Cude-Woods, C., Currie, S. A., Geltonbort, P., Ito, T., Lauer, T., Liu, C. Y., Majewski, J., Makela, M., Masuda, Y., Morris, C. L., Ramsey, J. C., Salvat, D., Saunders, A., Schroffenegger, J., Tang, Z., Wei, W., Wang, Z., Watkins, E., Young, A. R., Zeck, B. A.
We report on the evaluation of commercial electroless nickel phosphorus (NiP) coatings for ultracold neutron (UCN) transport and storage. The material potential of 50~$\mu$m thick NiP coatings on stainless steel and aluminum substrates was measured t
Externí odkaz:
http://arxiv.org/abs/1703.00508