LUX-ZEPLIN

Research group

Research theme

Sub department

About

Scintillation studies of CaWO4 in the milli-kelvin temperature range

Physical Review B: Condensed Matter and Materials Physics 75 (2007) 184308 6pp

Authors:

SA Henry, V. B. Mikhailik, H. Kraus, A. J. B. Tolhurst
More details from the publisher
More details

Excited states of molybdenum oxyanion in scheelite and wolframite structures

RADIAT MEAS 42:4-5 (2007) 767-770

Authors:

A Kotlov, L Jonsson, H Kraus, V Mikhailik, V Nagirnyi, G Svensson, BI Zadneprovski

Abstract:

Scheelite CdMoO4 and wolframite eCdWO(4):MO (0.04-0.4wt%) single crystals were studied using the time-resolved spectroscopy under UV excitation over a temperature range of 1.85-300K. The threshold energies for the creation of free charge carriers were measured using the method of photostimulated luminescence. The decay kinetics of the main emission in CdMoO4 and the molybdenum-related emission in CdWO4:MO was studied and the parameters of the triplet excited states of molybdenum-related oxyanions were calculated. (C) 2007 Elsevier Ltd. All rights reserved.
More details from the publisher

Multiple photon counting technique for detection and analysis of slow scintillation processes

RADIAT MEAS 42:4-5 (2007) 921-924

Authors:

H Kraus, VB Mikhailik, D Wahl

Abstract:

The development of the multi-photon counting (MPC) technique for the investigation of scintillation properties of materials is presented. The technique is based on the recording and analysis of a sequence of individual photon pulses resulting from a scintillation event. The technique is especially advantageous for the analysis of slow scintillation processes and the investigation of temperature-dependent scintillator proper-Lies. The results on the temperature variation of scintillation characteristics of ZnSe and ZnSe-Te are presented to illustrate the performance of the MPC technique. (c) 2007 Elsevier Ltd. All rights reserved.
More details from the publisher

In situ radioglaciological measurements near Taylor Dome, Antarctica and implications for UHE neutrino astronomy

(2007)

Authors:

D Besson, J Jenkins, S Matsuno, J Nam, M Smith, SW Barwick, JJ Beatty, WR Binns, C Chen, P Chen, JM Clem, A Connolly, PF Dowkontt, MA DuVernois, RC Field, D Goldstein, PW Gorham, A Goodhue, C Hast, CL Hebert, S Hoover, MH Israel, J Kowalski, JG Learned, KM Liewer, JT Link, E Lusczek, B Mercurio, C Miki, P Miocinovic, CJ Naudet, J Ng, R Nichol, K Palladino, K Reil, A Romero-Wolf, M Rosen, L Ruckman, D Saltzberg, D Seckel, GS Varner, D Walz, F Wu
More details from the publisher

Effect of Ca doping on the structure and scintillation properties of ZnWO 4

Physica Status Solidi (A) Applications and Materials Science 204:3 (2007) 730-736

Authors:

H Kraus, VB Mikhaailik, L Vasylechko, D Day, KB Hutton, J Telfer, Y Prots

Abstract:

The future application of ZnWO 4 scintillator in a cryogenic search for rare events is the motivation for optimization of this material. We present results on the effect of Ca doping on the structure and scintillation properties of ZnWO 4. X-ray diffraction analysis revealed that there is no mixing in the CaWO 4-ZnWO 4 pseudobinary system due to a significant mismatch of the crystal structures of CaWO 4 and ZnWO 4. The lattice parameters of Ca-doped ZnWO 4 samples obtained from X-ray powder diffraction data confirmed this finding. It is also shown that ZnWO 4 retains the monoclinic wolframite structure when cooling, at 12 K exhibiting the following lattice parameters: a = 4.6826(2) Å, b = 5.7088(2) Å, c = 4.9230(2) Å and β = 90.541(2)°. The scintillation light yield of the Zn 1-x,Ca xWO 4 was measured using the multi-photon counting technique and it is found that small concentrations of Ca (x = 0.001 - 0.02) cause no deterioration of this parameter. Ca doping of ZnWO 4 is expected to facilitate production of a single-crystalline scintillator. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
More details from the publisher
More details