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Measurement of the ultracold neutrons loss coefficient in beryllium power; Izmerenie koehffitsienta poter` ul`trakholodnykh nejtronov v poroshke berilliya

Technical Report:

Abstract

The ultracold neutrons (UCN) reflection from beryllium powder at different slab thicknesses and different packing densities is measured. The reduced UCN loss coefficient {eta}=(1.75{+-}0.35)x10{sup -4} for thermally untreated beryllium is extracted from experimental data. The formerly obtained experimental results on UCN reflection from beryllium after high temperature outgasing are reconsidered. The loss coefficient {eta} at room temperature in this case is obtained to be (6.4{+-}2.5)x10{sup -5}, which is an order of magnitude higher the theoretical one. The extraction of the loss coefficient from the experimental data is based on the modified diffusion theory where albedo reflection depends on packing density. 15 refs.; 3 figs.
Publication Date:
Dec 31, 1991
Product Type:
Technical Report
Report Number:
JINR-R-3-91-415
Reference Number:
SCA: 663610; PA: AIX-24:009116; SN: 93000933523
Resource Relation:
Other Information: DN: Submitted to Yad. Fiz.; PBD: 1991
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ULTRACOLD NEUTRONS; BERYLLIUM; PARTICLE LOSSES; ALBEDO; GRAIN DENSITY; GRAIN SIZE; LAYERS; POWDERS; REFLECTION; TEMPERATURE RANGE 0400-1000 K; 663610; NEUTRON PHYSICS
OSTI ID:
10119774
Research Organizations:
Joint Inst. for Nuclear Research, Dubna (Russian Federation). Lab. of Neutron Physics
Country of Origin:
JINR
Language:
Russian
Other Identifying Numbers:
Other: ON: DE93613521; TRN: RU9206943009116
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
[14] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Golikov, V V, Ignatovich, V K, and Kulagin, E N. Measurement of the ultracold neutrons loss coefficient in beryllium power; Izmerenie koehffitsienta poter` ul`trakholodnykh nejtronov v poroshke berilliya. JINR: N. p., 1991. Web.
Golikov, V V, Ignatovich, V K, & Kulagin, E N. Measurement of the ultracold neutrons loss coefficient in beryllium power; Izmerenie koehffitsienta poter` ul`trakholodnykh nejtronov v poroshke berilliya. JINR.
Golikov, V V, Ignatovich, V K, and Kulagin, E N. 1991. "Measurement of the ultracold neutrons loss coefficient in beryllium power; Izmerenie koehffitsienta poter` ul`trakholodnykh nejtronov v poroshke berilliya." JINR.
@misc{etde_10119774,
title = {Measurement of the ultracold neutrons loss coefficient in beryllium power; Izmerenie koehffitsienta poter` ul`trakholodnykh nejtronov v poroshke berilliya}
author = {Golikov, V V, Ignatovich, V K, and Kulagin, E N}
abstractNote = {The ultracold neutrons (UCN) reflection from beryllium powder at different slab thicknesses and different packing densities is measured. The reduced UCN loss coefficient {eta}=(1.75{+-}0.35)x10{sup -4} for thermally untreated beryllium is extracted from experimental data. The formerly obtained experimental results on UCN reflection from beryllium after high temperature outgasing are reconsidered. The loss coefficient {eta} at room temperature in this case is obtained to be (6.4{+-}2.5)x10{sup -5}, which is an order of magnitude higher the theoretical one. The extraction of the loss coefficient from the experimental data is based on the modified diffusion theory where albedo reflection depends on packing density. 15 refs.; 3 figs.}
place = {JINR}
year = {1991}
month = {Dec}
}