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LABR3 SCINTILLATION DETECTOR AND SPECIFIC EVENT REMOVAL METHOD

外国特許コード F160008869
整理番号 (S2015-0691-N0)
掲載日 2016年10月5日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2016JP054017
国際公開番号 WO 2016136480
国際出願日 平成28年2月10日(2016.2.10)
国際公開日 平成28年9月1日(2016.9.1)
優先権データ
  • 特願2015-035788 (2015.2.25) JP
発明の名称 (英語) LABR3 SCINTILLATION DETECTOR AND SPECIFIC EVENT REMOVAL METHOD
発明の概要(英語) The present invention identifies α decay and other events included in the emission of an LaBr3 scintillator and only collects γ radiation events. An LaBr3 scintillation detector is provided with an LaBr3 scintillator 10, a photomultiplier tube 12, an oscilloscope 14, and a computer 18. The computer 18 detects the peak value Vp and the total charge amount Qtotal of a voltage waveform signal and calculates an error propagation expression function for the ratio of the peak value Vp to the total charge amount Qtotal. This error propagation expression function is used as a threshold function for identifying and removing α decay events. α decay events are identified from the peak value Vp and total charge amount Qtotal, which are measurement values that can be measured in real time.
特許請求の範囲(英語) [claim1]
1. LaBr [3] scintillator and,
The description above LaBr [3] the photoelectric transmitter which converts radiation of the scintillator to the electric information and,
The corrugated signal output vessel which converts output from the aforementioned photoelectric transmitter to the voltage waveform signal and,
Peak value Vp of the aforementioned voltage waveform signal and all the electric charge quantities Q [the detection expedient which detects total] and,
The aforementioned peak value Vp and the aforementioned all the electric charge quantities Q [the calculation expedient which calculates the error propagation type function of the ratio of total] and,
The processing expedient which by the fact that it uses the aforementioned error propagation type function as threshold function, the event other than the I line specifies, removes the said event and,
LaBr which features that it has [3] the scintillation detector.
[claim2]
2. LaBr of statement [3] in the scintillation detector in claim 1,
LaBr which features that furthermore it has the low-pass filter which removes the high frequency component of the aforementioned voltage waveform signal which is output from the aforementioned corrugated signal output vessel [3] the scintillation detector.
[claim3]
3. LaBr of statement [3] in the scintillation detector in claim 1,
As for the aforementioned calculation expedient, in order to become linear the aforementioned all the electric charge quantities Q [vis-a-vis total], revising the aforementioned peak value Vp which, is detected with the aforementioned detector, LaBr which features that it calculates standard deviation [3] the scintillation detector.
[claim4]
4. LaBr of statement [3] in the scintillation detector in claim 1,
As for the aforementioned calculation expedient, the error propagation type function in the energy range below 1.5MeV is calculated
LaBr which features thing [3] the scintillation detector.
[claim5]
5. LaBr of statement [3] in the scintillation detector in claim 1,
As for the aforementioned processing expedient, LaBr which features that the error propagation type function of 3.sigma. is used as the aforementioned threshold function, [3] the scintillation detector.
[claim6]
6. LaBr of statement [3] in the scintillation detector in claim 1,
The aforementioned peak value Vp and the aforementioned all the electric charge quantities Q [as for the ratio of total], Vp/Q [total] LaBr which features that is [3] the scintillation detector.
[claim7]
7. LaBr of statement [3] in the scintillation detector in claim 1,
The aforementioned peak value Vp which is detected with the aforementioned detector, in order to become linear the aforementioned all the electric charge quantities Q [vis-a-vis total], it revises the aforementioned calculation expedient, peak value Vp and the aforementioned all the electric charge quantities Q which are revised [Vp/Q which is the ratio of total] [it calculates the error propagation type function in the energy range below 1.5MeV of total],
The aforementioned processing expedient uses the error propagation type function of 3.sigma. as the aforementioned threshold function,
LaBr which features thing [3] the scintillation detector.
[claim8]
8. LaBr [3] being the method of removing the specific event of the scintillator,
The description above LaBr [3] converting radiation of the scintillator to the voltage waveform signal, the step which it outputs and,
Peak value Vp of the aforementioned voltage waveform signal and all the electric charge quantities Q [the step which detects total] and,
In the energy range below the specified value which the aforementioned peak value Vp and the aforementioned all the electric charge quantities Q [calculates the standard deviation of the ratio of total,] the step which calculates the error propagation type function of the aforementioned standard deviation the event other than the inside I line of radiation of the aforementioned scintillator is not included and,
The step which the event in the energy range above the aforementioned the aforementioned error propagation type function specified value as threshold function using specifies, removes the said event and,
The specific event removal method of featuring that it has.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • HOKKAIDO UNIVERSITY
  • 発明者(英語)
  • ISHIKAWA MASAYORI
  • OGAWARA RYO
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KN KP KR KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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