InP solid state detector and the observation of low energy solar neutrinos

Autor: Y, Fukuda, T, Izawa, Y, Koshio, S, Moriyama, M, Shiozawa, T, Namba
Přispěvatelé: 論文, Faculty of Education, Miyagi University of Education, Solid State Devision, Hamamatsu Photonics K.K., Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, ICEPP, International Center for Elementary Particle Physics, University of Tokyo
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: 宮城教育大学紀要. 43:97-104
Popis: A large volume radiation detectors using a semi-insulating Indium Phosphide (InP) wafer have been developed for Indium Project on Neutrino Observation for Solar interior (IPNOS) experiment. The volume has achieved to 20mm3 , and this is world largest size among the detector observed gammas at hundred keV region. Although the depletion layer, most of charge are generated by an induction, and the charge collection efficiency achieves 50 to 60%, which is determined by the detector thickness and the carrier drift length (Ld = 120μm). The energy resolution is obtained by 25%. We measured actual backgrounds from 115 In beta decay, and also the effect of radiative Bremsstrahlung from those betas. No significant event was found in the measurement and the radiation such as Bremsstrahlung from InP detector could be negligible.
Databáze: OpenAIRE