1 / 12

CRESST-II background discrimination: detection of 180 W natural decay in a pure alpha spectrum

CRESST-II background discrimination: detection of 180 W natural decay in a pure alpha spectrum. Paper submitted to Physical Review C (also available on nucl-ex/0408006). C. Cozzini 1 , G. Angloher 2 , C. Bucci 3 , F. von Feilitzsch 4 , D. Hauff 2 , S. Henry 1 , Th. Jagemann 4 , J. Jochum,

jane
Download Presentation

CRESST-II background discrimination: detection of 180 W natural decay in a pure alpha spectrum

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CRESST-II background discrimination: detection of 180W natural decay in a pure alpha spectrum Paper submitted to Physical Review C (also available on nucl-ex/0408006)

  2. C. Cozzini1, G. Angloher2, C. Bucci3, F. von Feilitzsch4, D. Hauff2, S. Henry1, Th. Jagemann4, J. Jochum, H. Kraus1, B. Majorovits1, V. Mikhailik1, J. Ninkovic2, F. Petricca2, W. Potzel4, F. Proebst2, Y. Ramachers1,*,W. Rau2, M. Razeti4, W. Seidel2, M. Stark4, L. Stodolsky2, A. J. B. Tolhurst1, W. Westphal4, H. Wulandari4 1. University of Oxford, U.K. 2. MPI für Physik, Munich, Germany 3. Laboratori Nazionali del Gran Sasso, Italy 4. Technische Universität München, Germany 5. Eberhard-Karls-Universität Tübingen, Germany * Permanent address: University of Warwick, U.K.

  3. CRESST PhaseII detector module simultaneous measurement of phonons and scintillation light to discriminate nuclear recoil signals from radioactive background Superconducting film as thermometer light reflector thermometer 300 g CaWO4 crystal separate cryogenic light detector

  4. irradiation with e- and  with e- und neutrons Background Suppression:98 % 10-20 keV 99.7% 15-25 keV 99.9% > 20 keV

  5. U-Th >

  6. ICP-MS (inductively coupled plasma mass-spectrometry) analysis of the impurities in CaWO4 X-ray luminescence of CaWO4 Russian Ukrainian RE- impurities in Russian (Y, Nd, Gd and Er all >1 ppm) and Pb (~1 ppm ) inUkrainiansamples

  7. 144Nd 180W 152Gd 147Sm

  8. Run 28 crystal D 180W

  9. Strength of CRESST discrimination techniques High sensitivity (~1µBq/kg) Detection of the alpha decay of 180W 182W 183W 184W 186W: improving by a factor of 50 the best previously published limits Summary

More Related