An improved measurement of electron-ion recombination in high-pressure xenon gas

被引:13
作者
Serra, L. [1 ,2 ]
Sorel, M. [1 ,2 ]
Alvarez, V. [1 ,2 ]
Borges, F. I. G. [3 ,4 ]
Camargo, M. [5 ]
Carcel, S. [1 ,2 ]
Cebrian, S. [6 ]
Cervera, A. [1 ,2 ]
Conde, C. A. N. [3 ,4 ]
Dafni, T. [6 ]
Diaz, J. [1 ,2 ]
Esteve, R. [7 ]
Fernandes, L. M. P. [8 ]
Ferrario, P. [1 ,2 ]
Ferreira, A. L. [9 ]
Freitas, E. D. C. [8 ]
Gehman, V. M. [10 ]
Goldschmidt, A. [10 ]
Gomez-Cadenas, J. J. [1 ,2 ]
Gonzalez-Diaz, D. [6 ]
Gutierrez, R. M. [5 ]
Hauptman, J. [11 ]
Hernando Morata, J. A. [12 ]
Herrera, D. C. [6 ]
Irastorza, I. G. [6 ]
Labarga, L. [13 ]
Laing, A. [1 ,2 ]
Liubarsky, I. [1 ,2 ]
Lopez-March, N. [1 ,2 ]
Lorca, D. [1 ,2 ]
Losada, M. [5 ]
Luzon, G. [6 ]
Mari, A. [7 ]
Martin-Albo, J. [1 ,2 ]
Martinez-Lema, G. [12 ]
Martinez, A. [1 ,2 ]
Miller, T. [10 ]
Monrabal, F. [1 ,2 ]
Monserrate, M. [1 ,2 ]
Monteiro, C. M. B. [8 ]
Mora, F. J. [7 ]
Moutinho, L. M. [9 ]
Munoz Vidal, J. [1 ,2 ]
Nebot-Guinot, M. [1 ,2 ]
Nygren, D. [14 ]
Oliveira, C. A. B. [10 ]
Perez, J. [13 ]
Perez Aparicio, J. L. [15 ]
Querol, M. [1 ,2 ]
Renner, J. [1 ,2 ]
机构
[1] CSIC, Inst Fis Corpuscular IFIC, Calle Catedrat Jose Beltran 2, Valencia 46980, Spain
[2] Univ Valencia, Valencia 46980, Spain
[3] Univ Coimbra, LIP, P-3004516 Coimbra, Portugal
[4] Univ Coimbra, Dept Fis, P-3004516 Coimbra, Portugal
[5] Univ Antonio Narino, Ctr Invest, Bogota, Colombia
[6] Univ Zaragoza, Lab Fis Nucl & Astroparticulas, E-50009 Zaragoza, Spain
[7] Univ Politecn Valencia, Inst Instrumentac Imagen Mol I3M, E-46022 Valencia, Spain
[8] Univ Coimbra, Dept Phys, LIBPhys, P-3004516 Coimbra, Portugal
[9] Univ Aveiro, Inst Nanostruct Nanomodelling & Nanofabricat i3N, P-3810193 Aveiro, Portugal
[10] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[11] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[12] Univ Santiago de Compostela, IGFAE, Santiago De Compostela 15782, Spain
[13] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain
[14] Univ Texas Arlington, Arlington, TX 76019 USA
[15] Univ Politecn Valencia, Dept Mecan Med Continuos & Teor Estruct, Valencia 46071, Spain
[16] Univ Girona, Escola Politecn Super, Girona 17071, Spain
[17] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA
[18] Joint Inst Nucl Res, Dubna 141980, Russia
来源
JOURNAL OF INSTRUMENTATION | 2015年 / 10卷
基金
欧洲研究理事会;
关键词
Charge transport; multiplication and electroluminescence in rare gases and liquids; Double-beta decay detectors; Time projection chambers; Ionization and excitation processes; MONTE-CARLO-SIMULATION; ALPHA-PARTICLES; ENERGY; DRIFT; LUMINESCENCE; RAYS; PAIR;
D O I
10.1088/1748-0221/10/03/P03025
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We report on results obtained with the NEXT-DEMO prototype of the NEXT-100 high-pressure xenon gas time projection chamber (TPC), filled with pure xenon gas at 10 bar pressure and exposed to an alpha decay calibration source. Compared to our previous measurements with alpha particles, an upgraded detector and improved analysis techniques have been used. We measure event-by-event correlated fluctuations between ionization and scintillation due to electronion recombination in the gas, with correlation coefficients between -0.80 and -0.56 depending on the drift field conditions. By combining the two signals, we obtain a 2.8% FWHM energy resolution for 5.49 MeV alpha particles and a measurement of the optical gain of the electroluminescent TPC. The improved energy resolution also allows us to measure the specific activity of the radon in the gas due to natural impurities. Finally, we measure the average ratio of excited to ionized atoms produced in the xenon gas by alpha particles to be 0.561 +/- 0.045, translating into an average energy to produce a primary scintillation photon of W-ex = (39.2 +/- 3.2) eV.
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页数:21
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