title: Superheated emulsions as high-energy neutron dosemeters.
abstract: Superheated emulsions being inexpensive, easy to fabricate, and having tissue equivalent composition make them as one of the popular neutron dosemeters. One more advantage is that they can be made insensitive to gamma rays by the choice of the sensitive liquid. It is observed that the response of commercially available bubble detector to neutron decreases above 20 MeV while its response is roughly flat in the 0.1-15 MeV region. This restricts its application as a dosemeter to high-energy neutrons. The response of bubble detector from Bubble Technology Industries, has been observed by using Pb-breeder for high-energy neutrons from different facilities in Japan. It is observed that 2-3 cm Pb-breeder is effective in increasing the response of the detector to the nominal value. Theoretical calculation using MCNPX code indicates an increase in neutrons in the energy range of 0.1-10 MeV with Pb-breeder. The present work indicates the possibility of using the bubble detector as a dosemeter to high-energy neutron using a Pb-breeder of proper thickness.
authors.affiliation: Department of Quantum Energy Engineering, Graduate School of Engineering, Hokkaido University, Kita-13 Nishi-8, Kita-Ku, Sapporo, Hokkaido 060-8628, Japan.
authors.forename: Mala
authors.initials: M
authors.lastname: Das
authors.forename: Teruko
authors.initials: T
authors.lastname: Sawamura
authors.forename: Masashi
authors.initials: M
authors.lastname: Abe
authors.forename: Junichi H
authors.initials: JH
authors.lastname: Kaneko
authors.forename: Akira
authors.initials: A
authors.lastname: Homma
authors.forename: Fumiyuki
authors.initials: F
authors.lastname: Fujita
authors.forename: Shuichi
authors.initials: S
authors.lastname: Tsuda
authors.forename: Takeo
authors.initials: T
authors.lastname: Nishitani
mesh_terms: D000465:Algorithms; D001822:Body Burden; D003198:Computer Simulation; D004655:Emulsions / Q000528:radiation effects; D004781:Environmental Exposure / Q000032:analysis; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000379:methods; D005214:Fast Neutrons; D006358:Hot Temperature; D018499:Linear Energy Transfer; D008956:Models, Chemical; D016273:Occupational Exposure / Q000032:analysis*; D011829:Radiation Dosage; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods; D011868:Radioisotopes / Q000032:analysis*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D012062:Relative Biological Effectiveness; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D014159:Transducers
chemical_list: D004655:Emulsions; D011868:Radioisotopes