A new method for measuring the neutron lifetime using an in situ neutron detector

In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold neutrons (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. An active detector t...

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Veröffentlicht in:	Review of scientific instruments 2017-05, Vol.88 (5), p.053508-053508
Hauptverfasser:	Morris, C. L., Adamek, E. R., Broussard, L. J., Callahan, N. B., Clayton, S. M., Cude-Woods, C., Currie, S. A., Ding, X., Fox, W., Hickerson, K. P., Hoffbauer, M. A., Holley, A. T., Komives, A., Liu, C.-Y., Makela, M., Pattie, R. W., 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, Wanchun, Wexler, J. W., Womack, T. L., Young, A. R., Zeck, B. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY Measurement techniques Neutron counters Neutrons Scientific apparatus & instruments
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Beschreibung
Zusammenfassung:	In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold neutrons (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. An active detector that can be lowered into the trap has been used to measure the neutron distribution as a function of height and measure the influence of marginally trapped UCN on the neutron lifetime measurement. In addition, measurements have demonstrated phase-space evolution and its effect on the lifetime measurement.
ISSN:	0034-6748 1089-7623
DOI:	10.1063/1.4983578