Upscattering of ultracold neutrons from gases

UCNτ Collaboration

doi:10.1103/PhysRevC.92.065501

Upscattering of ultracold neutrons from gases

UCNτ Collaboration

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We present measurements of the upscattering cross sections of ultracold neutrons (UCNs) from room-temperature hydrogen, deuterium, neon, argon, xenon, C4H10, CF4, and air. The values of these cross sections are important for estimating the loss rate of trapped neutrons due to residual gas and are therefore of importance for neutron lifetime measurements using UCNs. Cross sections were obtained from a combined analysis of the UCN attenuation in a gas cell and direct measurement of the neutrons upscattered in the cell. The effects of the UCN velocity and path-length distributions were accounted for using a Monte Carlo transport code. Results are compared with measurements at higher neutron energy as well as with calculations.

Original language	English
Article number	065501
Journal	Physical Review C - Nuclear Physics
Volume	92
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.92.065501
State	Published - Dec 14 2015
Externally published	Yes

Funding

This material is supported by the LANL LDRD program, the U.S. Department of Energy Office of Science, Office of Nuclear Physics through LANL DOE Grant No. 2015LANLE9BU and North Carolina State University Grant No. DE-FG02-97ER41042, the U.S. National Science Foundation through Indiana University Grants No. PHY-0969490/PHY-1068712, and North Carolina State University grant NSF Grant No. 1307426.

Funders	Funder number
National Science Foundation	1506459
Directorate for Mathematical and Physical Sciences	1307426

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10.1103/PhysRevC.92.065501

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title = "Upscattering of ultracold neutrons from gases",

abstract = "We present measurements of the upscattering cross sections of ultracold neutrons (UCNs) from room-temperature hydrogen, deuterium, neon, argon, xenon, C4H10, CF4, and air. The values of these cross sections are important for estimating the loss rate of trapped neutrons due to residual gas and are therefore of importance for neutron lifetime measurements using UCNs. Cross sections were obtained from a combined analysis of the UCN attenuation in a gas cell and direct measurement of the neutrons upscattered in the cell. The effects of the UCN velocity and path-length distributions were accounted for using a Monte Carlo transport code. Results are compared with measurements at higher neutron energy as well as with calculations.",

author = "{UCNτ Collaboration} and Seestrom, {S. J.} and Adamek, {E. R.} and D. Barlow and Broussard, {L. J.} and Callahan, {N. B.} and Clayton, {S. M.} and C. Cude-Woods and S. Currie and Dees, {E. B.} and W. Fox and P. Geltenbort and Hickerson, {K. P.} and Holley, {A. T.} and Liu, {C. Y.} and M. Makela and J. Medina and Morley, {D. J.} and Morris, {C. L.} and J. Ramsey and A. Roberts and Salvat, {D. J.} and A. Saunders and Sharapov, {E. I.} and Sjue, {S. K.L.} and Slaughter, {B. A.} and B. Vorndick and Walstrom, {P. L.} and Z. Wang and Womack, {T. L.} and Young, {A. R.} and Zeck, {B. A.}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = dec,

day = "14",

doi = "10.1103/PhysRevC.92.065501",

language = "English",

volume = "92",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

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T1 - Upscattering of ultracold neutrons from gases

AU - UCNτ Collaboration

AU - Seestrom, S. J.

AU - Adamek, E. R.

AU - Barlow, D.

AU - Broussard, L. J.

AU - Callahan, N. B.

AU - Clayton, S. M.

AU - Cude-Woods, C.

AU - Currie, S.

AU - Dees, E. B.

AU - Fox, W.

AU - Geltenbort, P.

AU - Hickerson, K. P.

AU - Holley, A. T.

AU - Liu, C. Y.

AU - Makela, M.

AU - Medina, J.

AU - Morley, D. J.

AU - Morris, C. L.

AU - Ramsey, J.

AU - Roberts, A.

AU - Salvat, D. J.

AU - Saunders, A.

AU - Sharapov, E. I.

AU - Sjue, S. K.L.

AU - Slaughter, B. A.

AU - Vorndick, B.

AU - Walstrom, P. L.

AU - Wang, Z.

AU - Womack, T. L.

AU - Young, A. R.

AU - Zeck, B. A.

PY - 2015/12/14

Y1 - 2015/12/14

N2 - We present measurements of the upscattering cross sections of ultracold neutrons (UCNs) from room-temperature hydrogen, deuterium, neon, argon, xenon, C4H10, CF4, and air. The values of these cross sections are important for estimating the loss rate of trapped neutrons due to residual gas and are therefore of importance for neutron lifetime measurements using UCNs. Cross sections were obtained from a combined analysis of the UCN attenuation in a gas cell and direct measurement of the neutrons upscattered in the cell. The effects of the UCN velocity and path-length distributions were accounted for using a Monte Carlo transport code. Results are compared with measurements at higher neutron energy as well as with calculations.

AB - We present measurements of the upscattering cross sections of ultracold neutrons (UCNs) from room-temperature hydrogen, deuterium, neon, argon, xenon, C4H10, CF4, and air. The values of these cross sections are important for estimating the loss rate of trapped neutrons due to residual gas and are therefore of importance for neutron lifetime measurements using UCNs. Cross sections were obtained from a combined analysis of the UCN attenuation in a gas cell and direct measurement of the neutrons upscattered in the cell. The effects of the UCN velocity and path-length distributions were accounted for using a Monte Carlo transport code. Results are compared with measurements at higher neutron energy as well as with calculations.

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Upscattering of ultracold neutrons from gases

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