Measurement of the neutron lifetime using a magneto-gravitational trap and in situ detection

doi:10.1126/science.aan8895

GSTDTAP > 地球科学

DOI	10.1126/science.aan8895
	Measurement of the neutron lifetime using a magneto-gravitational trap and in situ detection
	Pattie, R. W., Jr.1; Callahan, N. B.2,3; Cude-Woods, C.1,4,5; Adamek, E. R.2,3; Broussard, L. J.6; Clayton, S. M.1; Currie, S. A.1; Dees, E. B.4,5; Ding, X.7; Engel, E. M.8; Fellers, D. E.1; Fox, W.2,3; Geltenbort, P.9; Hickerson, K. P.10; Hoffbauer, M. A.1; Holley, A. T.11; Komives, A.12; Liu, C. -Y.2,3; MacDonald, S. W. T.1; Makela, M.1; Morris, C. L.1; Ortiz, J. D.1; Ramsey, J.1; Salvat, D. J.13; Saunders, A.1; Seestrom, S. J.1,15; Sharapov, E. I.14; Sjue, S. K.1; Tang, Z.1; Vanderwerp, J.2,3; Vogelaar, B.7; Walstrom, P. L.1; Wang, Z.1; Wei, W.1; Weaver, H. L.1; Wexler, J. W.4,5; Womack, T. L.1; Young, A. R.4,5; Zeck, B. A.1,4,5
	2018-05-11
发表期刊	SCIENCE
ISSN	0036-8075
EISSN	1095-9203
出版年	2018
卷号	360 期号:6389 页码:627-631
文章类型	Article
语种	英语
国家	USA; France; Russia
英文摘要	The precise value of the mean neutron lifetime, tau(n), plays an important role in nuclear and particle physics and cosmology. It is used to predict the ratio of protons to helium atoms in the primordial universe and to search for physics beyond the Standard Model of particle physics. We eliminated loss mechanisms present in previous trap experiments by levitating polarized ultracold neutrons above the surface of an asymmetric storage trap using a repulsive magnetic field gradient so that the stored neutrons do not interact with material trap walls. As a result of this approach and the use of an in situ neutron detector, the lifetime reported here [877.7 +/- 0.7 (stat) +0.4/-0.2 (sys) seconds] does not require corrections larger than the quoted uncertainties.
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000431790900038
WOS关键词	ULTRACOLD NEUTRONS ; SCATTERED NEUTRONS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/198630
专题	地球科学资源环境科学气候变化
作者单位	1.Los Alamos Natl Lab, Los Alamos, NM 87545 USA; 2.Indiana Univ, Ctr Explorat Energy & Matter, Bloomington, IN 47408 USA; 3.Indiana Univ, Dept Phys, Bloomington, IN 47408 USA; 4.Triangle Univ Nucl Lab, Raleigh, NC 27695 USA; 5.North Carolina State Univ, Raleigh, NC 27695 USA; 6.Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA; 7.Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA; 8.West Point Mil Acad, West Point, NY 10996 USA; 9.Inst Laue Langevin, Grenoble, France; 10.CALTECH, Kellogg Radiat Lab, Pasadena, CA 91125 USA; 11.Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA; 12.Depauw Univ, Dept Phys & Astron, Greencastle, IN 46135 USA; 13.Univ Washington, Dept Phys, Seattle, WA 98195 USA; 14.Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia; 15.Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA
推荐引用方式 GB/T 7714	Pattie, R. W., Jr.,Callahan, N. B.,Cude-Woods, C.,et al. Measurement of the neutron lifetime using a magneto-gravitational trap and in situ detection[J]. SCIENCE,2018,360(6389):627-631.
APA	Pattie, R. W., Jr..,Callahan, N. B..,Cude-Woods, C..,Adamek, E. R..,Broussard, L. J..,...&Zeck, B. A..(2018).Measurement of the neutron lifetime using a magneto-gravitational trap and in situ detection.SCIENCE,360(6389),627-631.
MLA	Pattie, R. W., Jr.,et al."Measurement of the neutron lifetime using a magneto-gravitational trap and in situ detection".SCIENCE 360.6389(2018):627-631.