Identification of a new escape channel for UCN from traps

Authors
Strelkov, AV Nesvizhevsky, VV Geltenbort, P Kartashov, DG Kharitonov, AG Lychagin, EV Muzychka, AY Pendlebury, JM Schreckenbach, K Shvetsov, VN Serebrov, AP Taldaev, RR Yaidjiev, P
Citation
Av. Strelkov et al., Identification of a new escape channel for UCN from traps, NUCL INST A, 440(3), 2000, pp. 695-703
Citations number
14
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
440
Issue
3
Year of publication
2000
Pages
695 - 703
Database
ISI
SICI code
0168-9002(20000211)440:3<695:IOANEC>2.0.ZU;2-X
Abstract
Ultra-cold neutrons (UCN) can be stored in a trap if their energy is lower than the trap wall potential. It is well known that the neutron density in a trap decreases due to neutron beta-decay, upscattering and absorption on surfaces but we have identified a complementary escape channel. This arises from a small increase in the energy of UCN during their interaction with a surface. Higher-energy neutrons can then escape into the bulk material or penetrate through the trap wall if it is thin enough. (C) 2000 Elsevier Sci ence B.V. All rights reserved.