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Methodology of measurement of thermal neutron time decay constant in Canberra 35+ MCA system

Abstract

A method of the thermal neutron time decay constant measurement in small bounded media is presented. A 14 MeV pulsed neutron generator is the neutron source. The system of recording of a die-away curve of thermal neutrons consists of a {sup 3}He detector and of a multichannel time analyzer based on analyzer Canberra 35+ with multi scaler module MCS 7880 (microsecond range). Optimum parameters for the measuring system are considered. Experimental verification of a dead time of the instrumentation system is made and a count-loss correction is incorporated into the data treatment. An attention is paid to evaluate with a high accuracy the fundamental mode decay constant of the registered decaying curve. A new procedure of the determination of the decay constant by a multiple recording of the die-away curve is presented and results of test measurements are shown. (author). 11 refs, 12 figs, 4 tabs.
Authors:
Drozdowicz, K; Gabanska, B; Igielski, A; Krynicka, E; Woznicka, U [1] 
  1. Institute of Nuclear Physics, Cracow (Poland)
Publication Date:
Dec 31, 1993
Product Type:
Technical Report
Report Number:
INP-1651/AP
Reference Number:
SCA: 663610; PA: AIX-26:048741; EDB-95:079938; ERA-20:016929; NTS-96:000240; SN: 95001395963
Resource Relation:
Other Information: PBD: 1993
Subject:
66 PHYSICS; THERMAL NEUTRONS; LIFETIME; FAST NEUTRONS; NEUTRON GUIDES; NEUTRON TRANSPORT; PULSED NEUTRON TECHNIQUES
OSTI ID:
50398
Research Organizations:
Institute of Nuclear Physics, Cracow (Poland)
Country of Origin:
Poland
Language:
English
Other Identifying Numbers:
Other: ON: DE95629005; CNN: Grant KBN 20199 91 01; TRN: PL9500132048741
Availability:
INIS; OSTI as DE95629005
Submitting Site:
PLN
Size:
33 p.
Announcement Date:
Jun 12, 1995

Citation Formats

Drozdowicz, K, Gabanska, B, Igielski, A, Krynicka, E, and Woznicka, U. Methodology of measurement of thermal neutron time decay constant in Canberra 35+ MCA system. Poland: N. p., 1993. Web.
Drozdowicz, K, Gabanska, B, Igielski, A, Krynicka, E, & Woznicka, U. Methodology of measurement of thermal neutron time decay constant in Canberra 35+ MCA system. Poland.
Drozdowicz, K, Gabanska, B, Igielski, A, Krynicka, E, and Woznicka, U. 1993. "Methodology of measurement of thermal neutron time decay constant in Canberra 35+ MCA system." Poland.
@misc{etde_50398,
title = {Methodology of measurement of thermal neutron time decay constant in Canberra 35+ MCA system}
author = {Drozdowicz, K, Gabanska, B, Igielski, A, Krynicka, E, and Woznicka, U}
abstractNote = {A method of the thermal neutron time decay constant measurement in small bounded media is presented. A 14 MeV pulsed neutron generator is the neutron source. The system of recording of a die-away curve of thermal neutrons consists of a {sup 3}He detector and of a multichannel time analyzer based on analyzer Canberra 35+ with multi scaler module MCS 7880 (microsecond range). Optimum parameters for the measuring system are considered. Experimental verification of a dead time of the instrumentation system is made and a count-loss correction is incorporated into the data treatment. An attention is paid to evaluate with a high accuracy the fundamental mode decay constant of the registered decaying curve. A new procedure of the determination of the decay constant by a multiple recording of the die-away curve is presented and results of test measurements are shown. (author). 11 refs, 12 figs, 4 tabs.}
place = {Poland}
year = {1993}
month = {Dec}
}