Browse

Blocking effect in CsI(Tl) crystal by neutron

Cited 0 time in Web of Science Cited 0 time in Scopus
Authors
주한울
Advisor
최선호
Major
자연과학대학 물리·천문학부(물리학전공)
Issue Date
2013-08
Publisher
서울대학교 대학원
Keywords
Dark matterWIMPsKIMSCsI(Tl) crystalChanneling effectBlocking effect
Description
학위논문 (석사)-- 서울대학교 대학원 : 물리·천문학부(물리학전공), 2013. 8. 최선호.
Abstract
To detect WIMP directly, which is strong candidate for dark matter, KIMS
collaboration used CsI(Tl) crystal as a scintillation detector. To increase the
detector`s sensitivity, we studied channeling and blocking effect in the
CsI(Tl) crystal, which refer to the orientation dependence of charged ion`s
penetration in crystals. It results in modulation of scintillation or ionization
yield in the CsI(Tl) crystal.
In order to measure the channeling and blocking effect in CsI(Tl) crystal,
we used a CsI(Tl) crystal, a neutron generator, and three neutron detectors,
with making the directions of recoil ions induced by the neutron-nucleus
scatterings to be aligned along one of the symmetry axis or plane in the
CsI(Tl) crystal. Also, we did simulations to compare their results with the
data obtained from our experimental setup, by two kinds of computer
simulations, MARLOWE and Geant4. To confirm the affection of the
blocking effect in the CsI(Tl) crystal, we compared the light yields of recoil
ions moving along the symmetry axis, [110], and those of recoil ions
moving along random directions, and compared mean decay time of signals
from each recoil direction. By comparing those from experiments and
simulations, we could find a clue for the blocking effect which is expected
to result in less scintillation light yields.
Language
English
URI
https://hdl.handle.net/10371/131688
Files in This Item:
Appears in Collections:
College of Natural Sciences (자연과학대학)Dept. of Physics and Astronomy (물리·천문학부)Physics (물리학전공)Theses (Master's Degree_물리학전공)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse