[Investigation on thermal-neutron sensitivity of commercial BeO(Na) thermoluminescence dosimeter and development of thermal-neutron insensitive BeO(Na) phosphors encapsulated in quartz-capillary].
BeO(Na) TLD on the market, UD-170 L, gives thermoluminescence response equivalent to irradiation with 3.2 +/- 0.5 cGy of 60Co gamma-rays after irradiation with 10(10) thermal neutrons per cm2. Because of this neutron sensitivity, UD-170 L is not suitable for measurement of gamma-rays in gamma-neutron mixed radiation from a nuclear reactor of Kinki University when we use it for radiobiological research. To reduce this troublesome sensitivity, we replaced the glass capillary used for UD-170 L with a quartz capillary. Quartz tube encapsulated BeO(Na) showed a markedly reduced response to thermal neutrons.
Hisanaga
S
S
Atomic Energy Research Institute, Kinki University, Higashiosaka-shi, Japan.
Yamashita
T
T
Kitamura
I
I
Itoh
T
T
Kondo
S
S
D004867:Equipment Design; D009502:Neutrons; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation*