Transmission measurements of guides for ultra-cold neutrons using UCN capture activation analysis of vanadium

A. Frei; K. Schreckenbach; B. Franke; F. J. Hartmann; T. Huber; R. Picker; S. Paul; P. Geltenbort

doi:10.1016/j.nima.2009.10.101

Transmission measurements of guides for ultra-cold neutrons using UCN capture activation analysis of vanadium

A. Frei, K. Schreckenbach, B. Franke, F. J. Hartmann, T. Huber, R. Picker, S. Paul, P. Geltenbort

Chair of Physics I

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14 Scopus citations

Abstract

The efficient transport of ultra-cold neutrons (UCN) from their source to the experimental site is a major issue for various kinds of precision experiments. Neutron guides often have to transport the UCN several tens of meters with acceptable losses. In order to qualify the guides, their UCN transmission properties have to be determined with high precision. For this purpose we have developed a novel method. The transmitted UCN were absorbed at the end of the guide in a vanadium disc producing the β-emitter ⁵² V (half life 3.74 min). The intensity of the 1434 keV γ-ray following the β-decay was measured. UCN guides of non-magnetic nickel alloys made by the replication technique were studied. They show a high Fermi pseudopotential V_F for UCN and a low surface roughness. For these guides the transmission per meter was determined with a relative error of ±0.6%, resulting in values above 0.95/m. By an absolute calibration of the γ-ray detection system we also deduced the absolute value of the UCN current absorbed in the vanadium plate. Possible applications of this method are discussed.

Original language	English
Pages (from-to)	349-353
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	612
Issue number	2
DOIs	https://doi.org/10.1016/j.nima.2009.10.101
State	Published - 1 Jan 2010

Keywords

Neutron guides
Transmission
UCN detection
Ultra-cold neutrons

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10.1016/j.nima.2009.10.101

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Frei, A., Schreckenbach, K., Franke, B., Hartmann, F. J., Huber, T., Picker, R., Paul, S., & Geltenbort, P. (2010). Transmission measurements of guides for ultra-cold neutrons using UCN capture activation analysis of vanadium. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 612(2), 349-353. https://doi.org/10.1016/j.nima.2009.10.101

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abstract = "The efficient transport of ultra-cold neutrons (UCN) from their source to the experimental site is a major issue for various kinds of precision experiments. Neutron guides often have to transport the UCN several tens of meters with acceptable losses. In order to qualify the guides, their UCN transmission properties have to be determined with high precision. For this purpose we have developed a novel method. The transmitted UCN were absorbed at the end of the guide in a vanadium disc producing the β-emitter 52 V (half life 3.74 min). The intensity of the 1434 keV γ-ray following the β-decay was measured. UCN guides of non-magnetic nickel alloys made by the replication technique were studied. They show a high Fermi pseudopotential VF for UCN and a low surface roughness. For these guides the transmission per meter was determined with a relative error of ±0.6%, resulting in values above 0.95/m. By an absolute calibration of the γ-ray detection system we also deduced the absolute value of the UCN current absorbed in the vanadium plate. Possible applications of this method are discussed.",

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author = "A. Frei and K. Schreckenbach and B. Franke and Hartmann, {F. J.} and T. Huber and R. Picker and S. Paul and P. Geltenbort",

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Frei, A, Schreckenbach, K, Franke, B, Hartmann, FJ, Huber, T, Picker, R, Paul, S & Geltenbort, P 2010, 'Transmission measurements of guides for ultra-cold neutrons using UCN capture activation analysis of vanadium', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 612, no. 2, pp. 349-353. https://doi.org/10.1016/j.nima.2009.10.101

Transmission measurements of guides for ultra-cold neutrons using UCN capture activation analysis of vanadium. / Frei, A.; Schreckenbach, K.; Franke, B. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 612, No. 2, 01.01.2010, p. 349-353.

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

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AU - Frei, A.

AU - Schreckenbach, K.

AU - Franke, B.

AU - Hartmann, F. J.

AU - Huber, T.

AU - Picker, R.

AU - Paul, S.

AU - Geltenbort, P.

PY - 2010/1/1

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N2 - The efficient transport of ultra-cold neutrons (UCN) from their source to the experimental site is a major issue for various kinds of precision experiments. Neutron guides often have to transport the UCN several tens of meters with acceptable losses. In order to qualify the guides, their UCN transmission properties have to be determined with high precision. For this purpose we have developed a novel method. The transmitted UCN were absorbed at the end of the guide in a vanadium disc producing the β-emitter 52 V (half life 3.74 min). The intensity of the 1434 keV γ-ray following the β-decay was measured. UCN guides of non-magnetic nickel alloys made by the replication technique were studied. They show a high Fermi pseudopotential VF for UCN and a low surface roughness. For these guides the transmission per meter was determined with a relative error of ±0.6%, resulting in values above 0.95/m. By an absolute calibration of the γ-ray detection system we also deduced the absolute value of the UCN current absorbed in the vanadium plate. Possible applications of this method are discussed.

AB - The efficient transport of ultra-cold neutrons (UCN) from their source to the experimental site is a major issue for various kinds of precision experiments. Neutron guides often have to transport the UCN several tens of meters with acceptable losses. In order to qualify the guides, their UCN transmission properties have to be determined with high precision. For this purpose we have developed a novel method. The transmitted UCN were absorbed at the end of the guide in a vanadium disc producing the β-emitter 52 V (half life 3.74 min). The intensity of the 1434 keV γ-ray following the β-decay was measured. UCN guides of non-magnetic nickel alloys made by the replication technique were studied. They show a high Fermi pseudopotential VF for UCN and a low surface roughness. For these guides the transmission per meter was determined with a relative error of ±0.6%, resulting in values above 0.95/m. By an absolute calibration of the γ-ray detection system we also deduced the absolute value of the UCN current absorbed in the vanadium plate. Possible applications of this method are discussed.

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Frei A, Schreckenbach K, Franke B, Hartmann FJ, Huber T, Picker R et al. Transmission measurements of guides for ultra-cold neutrons using UCN capture activation analysis of vanadium. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2010 Jan 1;612(2):349-353. doi: 10.1016/j.nima.2009.10.101

Transmission measurements of guides for ultra-cold neutrons using UCN capture activation analysis of vanadium

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