Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap
Creators
- Cude-Woods, C.1, 2
- Gonzalez, F. M.3, 4
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Fries, E. M.5
- Bailey, T.1
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Blatnik, M.5
- Callahan, N. B.6
- Choi, J. H.1, 2
- Clayton, S. M.7
- Currie, S. A.7
- Dawid, M.3
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Filippone, B. W.5
- Fox, W.3
- Geltenbort, P.8
- George, E.9
- Hayen, L.1, 2
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Hickerson, K. P.5
- Hoffbauer, M. A.7
- Hoffman, K.9
- Holley, A. T.9
- Ito, T. M.7
- Komives, A.10
- Liu, C.-Y.1, 2
- Makela, M.7
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Morris, C. L.7
- Musedinovic, R.1, 2
- O'Shaughnessy, C.7
- Pattie, R. W.11
- Ramsey, J.4
- Salvat, D. J.3
- Saunders, A.7, 4
- Sharapov, E. I.12
- Slutsky, S.5
- Su, V.5
- Sun, X.5
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Swank, C.5
- Tang, Z.7
- Uhrich, W.7
- Vanderwerp, J.3
- Walstrom, P.7
- Wang, Z.7
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Wei, W.5
- Young, A. R.1, 2
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1.
North Carolina State University
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2.
Triangle Universities Nuclear Laboratory
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3.
Indiana University Bloomington
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4.
Oak Ridge National Laboratory
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5.
California Institute of Technology
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6.
Argonne National Laboratory
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7.
Los Alamos National Laboratory
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8.
Institut Laue-Langevin
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9.
Tennessee Technological University
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10.
DePauw University
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11.
East Tennessee State University
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12.
Joint Institute for Nuclear Research
Abstract
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 protons in cold neutron beams and the most precise lifetime measured in neutron storage experiments. Measurements using different techniques are important for investigating whether there are unidentified systematic effects in any of the measurements. In this paper we report a new measurement using the Los Alamos asymmetric magneto-gravitational trap where the surviving neutrons are counted external to the trap using the fill and dump method. The new measurement gives a free neutron lifetime of τₙ = 876.3(2.4)_(stat)(0.8)_(syst). Although this measurement is not as precise, it is in statistical agreement with previous results using in situ counting in the same apparatus.
Additional Information
This work was supported by the LANL LDRD Program; the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Awards No. DE-FG02-ER41042, No. DE-AC52-06NA25396, No. DE-AC05-00OR2272, and No. 89233218CNA000001 under proposal LANLEDM; NSF Grants No. 1614545, No. 1914133, No. 1506459, No. 1553861, No. 1812340, No. 1714461, No. 2110898, and No. 1913789; and a NIST precision measurements Grant.Additional details
Identifiers
- Eprint ID
- 118934
- Resolver ID
- CaltechAUTHORS:20230125-514504700.12
Related works
- Describes
- 10.1103/PhysRevC.106.065506 (DOI)
Funding
- Department of Energy (DOE)
- DE-FG02-ER41042
- Department of Energy (DOE)
- DE-AC52-06NA25396
- Department of Energy (DOE)
- DE-AC05-00OR2272
- Department of Energy (DOE)
- 89233218CNA000001
- NSF
- PHY-1614545
- NSF
- PHY-1914133
- NSF
- PHY-1506459
- NSF
- PHY-1553861
- NSF
- PHY-1812340
- NSF
- PHY-1714461
- NSF
- PHY-2110898
- NSF
- PHY-1913789
- National Institute of Standards and Technology (NIST)
Dates
- Created
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2023-02-17Created from EPrint's datestamp field
- Updated
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2023-02-21Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Kellogg Radiation Laboratory