Total neutron cross section for 181Ta
The neutron time of flight facility nELBE, produces fast neutrons in the energy range from 0.1 MeV to 10 MeV by impinging a pulsed relativistic electron beam on a liquid lead circuit [1]. The short beam pulses (∼10 ps) and a small radiator volume give an energy resolution better than 1% at 1 MeV usi...
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Published in | EPJ Web of conferences Vol. 8; pp. 07006 - 7011 |
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Main Authors | , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
EDP Sciences
01.10.2010
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Online Access | Get full text |
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Summary: | The neutron time of flight facility nELBE, produces fast neutrons in the energy range from 0.1 MeV to 10 MeV by impinging a pulsed relativistic electron beam on a liquid lead circuit [1]. The short beam pulses (∼10 ps) and a small radiator volume give an energy resolution better than 1% at 1 MeV using a short flight path of about 6 m, for neutron TOF measurements. The present neutron source provides 2 ⋅ 104 n/cm2s at the target position using an electron charge of 77 pC and 100 kHz pulse repetition rate. This neutron intensity enables to measure neutron total cross section with a 2%–5% statistical uncertainty within a few days. In February 2008, neutron radiator, plastic detector [2] and data acquisition system were tested by measurements of the neutron total cross section for 181Ta and 27Al. Measurement of 181Ta was chosen because lack of high quality data in an anergy region below 700 keV. The total neutron cross – section for 27Al was measured as a control target, since there exists data for 27Al with high resolution and low statistical error [3]. |
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Bibliography: | istex:247FAB89CD1FD541DAE3B429DFA3BE0CC0270833 publisher-ID:epjconf_efnudat2010_07006 ark:/67375/80W-2Q84V8M1-1 other:2010EPJWC...807006M |
ISBN: | 9782759858 |
ISSN: | 2100-014X 2100-014X |
DOI: | 10.1051/epjconf/20100807006 |