Energy Calibration of CsI(Tl) Crystal for Quenching Factor Measurement in Dark Matter Search

YUE Qian; LIU Yan; LI Jin; WANG H; WANG M

Chinese Physics C> 2002, Vol. 26> Issue(7) : 728-734

Energy Calibration of CsI(Tl) Crystal for Quenching Factor Measurement in Dark Matter Search

Institute of High Energy Physics, Chinese Academy of Science, Beijing 1000392 Institute of Physics, Academia Sinica, Taipei 115293 Department of Physics, Taiwan University, Taipei 10600

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Abstract：
It is important to measure the quenching factor of recoiled nuclei of detector for direct detection of WIMP. Energy calibration of CsI(Tl) crystal detector for measuring quenching factor of recoiled nuclei induced by incident neutron beam has been done with low-energy X-ray sources such as ¹⁰⁹Cd and ¹³³Ba and the linearity of energy response of experimental system is obtained. The equivalent energy deposited in CsI(Tl) crystal of a single photoelectron of PMT has been measured. The time of integration of current signals is optimized for different X-ray source energys.

References

[1]

. Morales A. Nuclear Physics 2000, B87:477—488 2. WANG H T, LI Jin, Chang C Y et al. Astraparticle Physics,2000,14:141 3. WANG M Z, YUE Qian, DENG J R et al. "Feasibility Studies of WIMP Searches with CsI(Tl)Scintillating Crystals"submitted to Phys. Rev.,2001,C 4. LI H B, LIU Yan, CHEN C P et al. Nucl. Instr. Meth.2001,A459:493 5. Pecont S, Chambon B, Jesus M et al. Astroparticle Physics,1999,11:457 br6.Dossi R, Ianni A, Rauncci G et al. Nucl. Instr. Meth.2000,A451:623

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YUE Qian, LIU Yan, LI Jin, WANG H and WANG M. Energy Calibration of CsI(Tl) Crystal for Quenching Factor Measurement in Dark Matter Search[J]. Chinese Physics C, 2002, 26(7): 728-734.

YUE Qian, LIU Yan, LI Jin, WANG H and WANG M. Energy Calibration of CsI(Tl) Crystal for Quenching Factor Measurement in Dark Matter Search[J]. Chinese Physics C, 2002, 26(7): 728-734. shu

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Received: 2001-08-13
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Energy Calibration of CsI(Tl) Crystal for Quenching Factor Measurement in Dark Matter Search

Corresponding author: YUE Qian,

Institute of High Energy Physics, Chinese Academy of Science, Beijing 1000392 Institute of Physics, Academia Sinica, Taipei 115293 Department of Physics, Taiwan University, Taipei 10600

Received Date: 2001-08-13
Accepted Date: 1900-01-01
Available Online: 2002-07-05

Abstract: It is important to measure the quenching factor of recoiled nuclei of detector for direct detection of WIMP. Energy calibration of CsI(Tl) crystal detector for measuring quenching factor of recoiled nuclei induced by incident neutron beam has been done with low-energy X-ray sources such as ¹⁰⁹Cd and ¹³³Ba and the linearity of energy response of experimental system is obtained. The equivalent energy deposited in CsI(Tl) crystal of a single photoelectron of PMT has been measured. The time of integration of current signals is optimized for different X-ray source energys.