UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

Guest
2024-11-22 2:11
 HOME     CONFERENCES     SEARCH            LOGIN     NEW USER     IMAGES   


Conference: Bucharest University Faculty of Physics 2015 Meeting


Section: Nuclear and Elementary Particles Physics I


Title:
On a few problems in the building of the detectors with large sensitive volumes for neutrino Physics underground experiments


Authors:
Ionel LAZANU(1), Alexandru JIPA(1), Romul MARGINEANU(2), Bogdan MITRICA(2), Oana RISTEA(1), Marius CALIN(1), Tiberiu ESANU(1,2), Catalin RISTEA(3,1), Claudia GOMOIU(2), Liviu NITA(1), Daniel STOIAN(1), Tanase ALIONTE(1,4), Ana BLEBEA-APOSTU(2), Alexandru Stefan NAE(1), Alexandru ENE(1), Oana ANGHEL(1,5)


Affiliation:
(1) Faculty of Physics, University of Bucharest, ROMANIA

(2) National Institute of Physics and Nuclear Engineering “Horia Hulubei” Bucharest-Magurele

(3) Institute of Space Science Bucharest-Magurele

(4) High School “Serban Voda” Slanic Prahova

(5) Ministry of National Education and Research


E-mail
ionel.lazanu@gmail.com


Keywords:
materials radioactivity, high resolution gamma spectroscopy, time projection chamber, liquid argon, mobile detector, neutrino oscillations


Abstract:
The Neutrino Physics involves experiments using detectors with very large sensitive volumes. To increase the interaction probability it is necessary that the materials of the sensitive volumes of the detectors have enough high densities. In this work some aspects related to neutrino Physics experiments are discussed, namely: (i) Studies for hadron interactions in different materials of the sensitive volumes. (ii) High resolution gamma spectroscopy analysis. These measurements could be done in the laboratories of both institutions, including the underground low background radioactivity laboratory of NIPNE-HH, from salt mine “Unirea” Slanic-Prahova. This technique is used for identification of gamma radioactive isotopes of the tank components (concrete, membrane material, steel, etc.), for any components of structure that are used in great quantities. (iii) It is important to stress here that some isotopes present in different building elements could be activated due to long time exposure to muon and neutron fields, and this aspect must be studied, too. The two teams are able to measure the background due to neutrons using, for example, passive detectors, like droplet detectors. (iv) NIPNE team a mobile muon detector developed. It consists of two scintillator plates (around 0.9 m2, each) which measure in coincidence. The detector is installed on a van which facilitates measurements at different locations at the surface or in underground. With an adequate rotatable directional system, it is possible to measure differential (angular) flux of cosmic muons inside the cavern as well as inside the detector before complete construction. The work includes some recent results and ideas of the two teams.