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Phys. Rev. B 68, 054201 (2003) [5 pages]

Correlated fluctuations between luminescence and ionization in liquid xenon

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E. Conti1,2,*, R. DeVoe1, G. Gratta1, T. Koffas1, S. Waldman1, J. Wodin1, D. Akimov3, G. Bower2, M. Breidenbach2, R. Conley2, M. Danilov3, Z. Djurcic4, A. Dolgolenko3, C. Hall2, A. Odian2, A. Piepke4, C. Y. Prescott2, P. C. Rowson2, K. Skarpaas2, J-L. Vuilleumier5, K. Wamba2, and O. Zeldovich3
1Physics Department, Stanford University, Stanford, California, USA
2Stanford Linear Accelerator Center, Stanford University, Stanford, California, USA
3Institute for Theoretical and Experimental Physics, Moscow, Russia
4Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama, USA
5Institut de Physique, Universite de Neuchatel, Neuchatel, Switzerland

Received 9 March 2003; published 1 August 2003

The ionization of liquefied noble gases by radiation is known to be accompanied by fluctuations much larger than predicted by Poisson statistics. We have studied the fluctuations of both scintillation and ionization in liquid xenon and have measured a strong anti-correlation between the two at a microscopic level, with coefficient -0.80<ρep<-0.60. This provides direct experimental evidence that electron-ion recombination is partially responsible for the anomalously large fluctuations and at the same time allows substantial improvement of calorimetric energy resolution.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.68.054201
DOI:
10.1103/PhysRevB.68.054201
PACS:
61.25.Bi, 78.70.-g, 78.60.-b

*On leave from INFN Padova, Padova, Italy

 
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