Characteristics of Pb2+ doped CsI matrix under gamma and neutron excitations

dc.creatorPEREIRA, MARIA da C.C.
dc.creatorFILHO, TUFIC M.
dc.creatorBERRETTA, JOSE R.
dc.creatorTOMAZ, LUCAS F.
dc.creatorPINTO, MARLENE C.
dc.date2019
dc.date2019-07-26T18:39:11Z
dc.date2019-07-26T18:39:11Z
dc.date.accessioned2023-09-28T14:11:05Z
dc.date.available2023-09-28T14:11:05Z
dc.identifier2319-0612
dc.identifierhttp://repositorio.ipen.br/handle/123456789/29961
dc.identifier2A
dc.identifier7
dc.identifier10.15392/bjrs.v7i2A.595
dc.identifierSem Percentil
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9000199
dc.descriptionIn recent years, there has been an increasing interest in finding new fast scintillating material or improve the characteristics of known scintillators for the demand of high energy physics, industrial and nuclear medical ap-plications. Divalent lead ions Pb2+ built in some crystal structures are efficient emission centers and their appli-cations in scintillators were and are still the reason of an intensive study of emission properties of different com-pounds containing these ions. In this context, the crystals of Pb2+ doped CsI matrix were grown by the vertical Bridgman technique and subjected to annealing in vacuum of 10-6 mbar and constant temperature of 350??C, for 24 hours, and then they were employed. To evaluate the response of the CsI:Pb scintillator crystal to gamma radiation, radioactive sources of 137Cs (662 keV), 60Co (1173 keV and 1333 keV), 22Na (511 keV and 1275 keV) and 133Ba (355 keV) were used. The operating voltage of the photomultiplier was 2700 V for the detection of gamma rays and the accumulation time in the counting process was 600 s. The scintillator response to neutron radiation from a radioactive source of AmBe with energy range of 1 to 12 MeV was available. The activity of the AmBe source was 1 Ci Am. The emission rate was 2.2 x 106 neutrons / second. The operating voltage of the pho-tomultiplier tube was 1300 V. The accumulation time in the counting process was 600 s. With the results obtai-ned, it may be observed that the crystals are sensitive to these radiations.
dc.format1-13
dc.relationBrazilian Journal of Radiation Sciences
dc.rightsopenAccess
dc.sourceThe Meeting on Nuclear Applications (ENAN), 13th, 22-27 de outubro, 2017, Belo Horizonte, MG
dc.subjectscintillations
dc.subjectgamma radiation
dc.subjectcrystal growth
dc.subjectneutron activation analysis
dc.subjectlead ions
dc.subjectbarium 122
dc.subjectcesium 137
dc.subjectcobalt 60
dc.subjectsodium 22
dc.subjectcesium iodides
dc.subjectannealing
dc.subjectbridgman method
dc.subjectdoped materials
dc.subjectgamma spectroscopy
dc.subjectluminescence
dc.titleCharacteristics of Pb2+ doped CsI matrix under gamma and neutron excitations
dc.typeArtigo de peri??dico
dc.coverageN


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