公开(公告)号：JPH08285949A

公开(公告)日：1996-11-01

申请号：JP9060595

申请日：1995-04-17

Applicant: ALOKA CO LTD

Inventor： NAKAOKA HIROSHI ,  MATSUBARA SHOHEI ,  OSHIMA TOSHINORI

IPC: G01T1/24 ,  G01T1/38 ,  G01T3/08 ,  H01L31/09

Abstract: PURPOSE: To obtain a radiation detection apparatus by which the detection result for neutrons and the detection result for γ-rays or the like are obtained by one detector only. CONSTITUTION: A converter layer 12 which is composed of LiF emits heavy charged particles such as α-rays or the like when neutrons are incident. As a result of the thickness setting of the converter layers 12, the heavy changed particles which are emitted from the converted layer 12 so as to be incident on a detector 10 have energy at a definite value or higher. The thickness of a depletion layer is set to be larger than the range of the incident heavy charged particles and to be smaller than the range of β-rays at prescribed energy which is lower than that of the incident heavy charged particles. As a result, the detector 10 absorbes energy wholly, it outputs detection pulses at a definite level or higher, and it outputs only detection pulses at a definite leverl or lower regarding incident γ-rays or the like. Consequently, when the output pulses of the detector 10 are pulse-height-discriminated, a detection result regarding the neutrons and a detection result regarding the γ-rays can be obtained simultaneously.

公开(公告)号：JPH08285946A

公开(公告)日：1996-11-01

申请号：JP9060695

申请日：1995-04-17

Applicant: ALOKA CO LTD

Inventor： MATSUBARA SHOHEI ,  OSHIMA TOSHINORI

IPC: G01T1/172 ,  G01T1/167 ,  G01T1/20

Abstract: PURPOSE: To provide a positron detection apparatus by which the radioactivity of a positron nuclide can be measured precisely regarding a sample containing a disturbing nuclide and which can cover a wide measuring range. CONSTITUTION: A positron detection apparatus comprises two detection parts, i.e., a first detection part up to a simultaneous counting circuit 16 from scintillation detectors 10a, 10b and a second detection part up to a simultaneous counting circuit 26 from scintillation detectors 20a, 20b. In the respective detection parts, detection signals of the opposite scintillation detectors as one pair are counted simultaneously by the simultaneous counting circuit 16 or 26, and only pulses which are caused by a positron nuclide can be extracted. Since the volume of a scintillator part is different from each other in the respective detection parts, the detection efficiency of the respective detection parts is different from each other. Consequently, when the radioactivity of a sample exceeds the detection limit of every detection part having a large volume, the measured value of every detection part having a small volume is adopted. Thereby, a measured value whose accuracy is high over a wide measuring range can be obtained.

公开(公告)号：JPH08122439A

公开(公告)日：1996-05-17

申请号：JP25816194

申请日：1994-10-24

Applicant: ALOKA CO LTD

Inventor： MATSUBARA SHOHEI ,  OSHIMA TOSHINORI

IPC: G01T1/167 ,  G01T1/20 ,  G01T7/02

Abstract: PURPOSE: To obtain a highly accurate dust monitor in which the adhesion of dust to a detection system is suppressed. CONSTITUTION: An exhaust pipe 14a extending from an exhaust section 14 is coupled with a pump which is operated to introduce the outer air through an air introduction pipe 10. The outer air is introduced through the air introduction pipe 10 into a filter paper chamber 100 where the outer air passes through a sampling filter paper 18 and discharged through the exhaust pike 14a. A doughnut type scintillator plate 20 is fixed to the case 12 while opposing the sampling filter paper 18 and the air introduction pipe 10 is inserted into a through hole of the scintillator plate 20. The scintillator plate 20 constitutes one wall face of the filter paper chamber 100, i.e., one wall face of an air channel, and a photomultiplier 24 is disposed on the outside of the air channel. Since the photomultiplier 24 is not exposed directly to the air flow, dust scarcely adheres thereto.

公开(公告)号：JPH0743471A

公开(公告)日：1995-02-14

申请号：JP18375093

申请日：1993-07-26

Applicant: ALOKA CO LTD

Inventor： MATSUBARA SHOHEI ,  OSHIMA TOSHINORI ,  KANAZAWA HIDEO

IPC: G01T1/163 ,  G01T7/00

Abstract: PURPOSE:To realize a structure, which excludes psychological sense of oppression, sense of fear and the like, which are applied on a person under examination, in a whole-body counter for measuring the radioactive amount in the body. CONSTITUTION:A detector 14 is provided at the side surface of a human body 12. The detector 14 is contained in a collimator 16. A shielding wall 24 is provided on the other side. At least the front side of the human body 12 has an open structure. Therefore, sense of oppression, sense of fear and the like do not occur in the person under examination.

公开(公告)号：JP2011099793A

公开(公告)日：2011-05-19

申请号：JP2009255584

申请日：2009-11-06

Applicant: Aloka Co Ltd ,  Rie:Kk ,  アロカ株式会社 ,  株式会社アール・アイ・イー

Inventor： KATAYAMA TAKASHI ,  MATSUBARA SHOHEI ,  YAMADA KOICHI

IPC: G01T1/00 ,  A61B5/00 ,  A61B5/0402 ,  G01T7/00

Abstract: PROBLEM TO BE SOLVED: To provide a living body information detector being compact, lightweight, and mountable on a tested person, and allowing a rapid and sure response by radio-transmitting a measurement result even in cases where an emergency has occurred. SOLUTION: A living body condition detector 100 capable of radio-transmitting detection data is mounted on a wrist of a tested person, the condition detector 100 including at least an exposure sensor for detecting a radiation exposure dose and a three-dimensional acceleration sensor. Further, a living body information detector 500 is stuck on the chest thereof, the information detector 500 being capable of detecting an electrocardiographic signal and body temperature while being capable of radio-transmitting detection data. In cases where detection data are sent from the two detectors of the living body by radio communication, it can be ascertained that the tested person stands upright or is moving. In cases where detection data are not sent from the chest but data are sent from the wrist, it is determined that the tested person is down. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种紧凑，重量轻并可安装在被测试人身上的生物体信息检测器，并且即使在发生紧急情况的情况下也能够通过无线电传送测量结果来快速确定地做出响应。 解决方案：能够将检测数据进行无线电发送的生物体状态检测器100安装在被测试者的手腕上，条件检测器100至少包括用于检测放射线剂量的曝光传感器和三维加速度 传感器。 此外，生物体信息检测器500粘贴在其胸部，信息检测器500能够检测心电图信号和体温，同时能够进行无线电发送检测数据。 在通过无线电通信从生物体的两个检测器发送检测数据的情况下，可以确定被测试人员直立或正在移动。 在不从胸部发送检测数据但是从手腕发送数据的情况下，确定被测试人员已经关闭。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2007147581A

公开(公告)日：2007-06-14

申请号：JP2006003534

申请日：2006-01-11

Applicant: Aloka Co Ltd ,  アロカ株式会社

Inventor： MINAGAWA EIICHI ,  MATSUBARA SHOHEI

IPC: G01T1/20

Abstract: PROBLEM TO BE SOLVED: To enable formation of a light shielding layer having tough physical properties, and superior light-shielding effects. SOLUTION: When a thermal transfer sheet 18 overlaying a scintillator plate 16 is heat-treated, a coating 14 is separated from the thermal transfer sheet 18 and then stuck on the scintillator plate 16. The coating 14 includes a protective layer 24, an aluminum layer 26, and an adhesive layer 28. The aluminum layer 26 is protected by the protective layer 24. Since the scintillator member 10 functions as the back support substrate of the protective layer 24 and the aluminum layer 26, the coating 14 that is strong against an external action can be formed. A plurality of the coatings can be formed on the scintillator plate 16. When the coating 14 is formed, a pressure-sensitive transfer method can be utilized also. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：能够形成具有坚硬物理性能和优异的遮光效果的遮光层。 解决方案：当对闪烁体板16重叠的热转印片18进行热处理时，将涂层14与热转印片18分离，然后粘贴在闪烁体板16上。涂层14包括保护层24， 铝层26和粘合剂层28.铝层26被保护层24保护。由于闪烁体构件10用作保护层24和铝层26的后支撑衬底，所以涂层14是 可以形成对外界的强力。 可以在闪烁体板16上形成多个涂层。当形成涂层14时，也可以使用压敏转印方法。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2002365369A

公开(公告)日：2002-12-18

申请号：JP2001176038

申请日：2001-06-11

Applicant: ALOKA CO LTD

Inventor： UCHIBORI TAKESHI ,  MATSUBARA SHOHEI ,  YANO KENICHI ,  IWAMOTO AKINORI

IPC: G01T3/00

Abstract: PROBLEM TO BE SOLVED: To facilitate γ-ray sensitivity testing of a proportional counter type neutron detector. SOLUTION: A test dose rate lower than a standard dose rate is emitted to the detector. A characteristic curve 34 of γ-ray sensitivity is measured in an applied voltage range [VR1 , VR2 ] shifted from an operating voltage VD for performing a general neutron measurement to high-voltage side by an offset voltage VOFFSET corresponding to the difference between the test dose rate and the standard dose rate. On the basis of the difference between the test dose rate and the standard dose rate, an estimate value VS' of a ris voltage VS in the characteristic curve 32 of the normalized dose rate is determined from the build-up voltage VT in the characteristic curve 34 of the test dose rate. The estimate value VS' is compared with VD, and when VS' is larger than VD, it is decided that the detector is insensitive with respect to γ-ray up to the normalized dose rate DS. When VS' is equal to or smaller than VD, it is decided that γ-ray is detectable at the normalized dose rate DS or less with the set operating voltage VD.

公开(公告)号：JP2002022839A

公开(公告)日：2002-01-23

申请号：JP2000200585

申请日：2000-07-03

Applicant: ALOKA CO LTD

Inventor： MATSUBARA SHOHEI

IPC: G01T1/20 ,  G01T1/24 ,  H01L31/09

Abstract: PROBLEM TO BE SOLVED: To prevent a step of dose rate measured values at a boundary of dose rate ranges when a wide-range radiation-measuring apparatus is to be constituted with the use of a plurality of radiation detectors in charge of different dose rate ranges from each other. SOLUTION: An energy-estimating part 70 estimates an energy of incident radioactive rays on the basis of an energy spectrum generated in relation to the incident radioactive rays by a spectrum-analyzing part 38. A correction constant-determining part 72 in which correction constants for correcting response differences dependent on an energy between a scintillation detector 30 and a semiconductor detector 32 are stored delivers the correction constant corresponding to the present energy obtained by the energy-estimating part 70 to a correcting/calculating part 56. The correcting/calculating part 56 corrects the dose rate from the semiconductor detector 32 to a value matching the response of the scintillation detector 30.

公开(公告)号：JP2001116844A

公开(公告)日：2001-04-27

申请号：JP30009499

申请日：1999-10-21

Applicant: ALOKA CO LTD

Inventor： YANO KENICHI ,  MATSUBARA SHOHEI

IPC: G01T1/185 ,  G01T1/16 ,  G01T1/167 ,  G01T1/178

Abstract: PROBLEM TO BE SOLVED: To reduce an influence of an α-ray nuclide such as radon and thron contained in the air to enhance measuring precision, in gas monitoring for taking an outside air into an ionization chamber to detect β-rays. SOLUTION: An ionization current output from the ionization chamber 10 is converted into a voltage signal by an electrometer 20. The voltage signal is branched into two paths to be differentiated in the path A by a differentiating circuit 30. A pulse-height discriminator 32 takes out only large pulses corresponding to α-rays out of a differentiated result differentiated hereinbefore and a counting circuit 34 counts the pulses of the α-rays to find a counting rate. The voltage signal is integrated with a prescribed integral time constant in the path B by an integrating circuit 40 to be averaged. A found average voltage is measured by a voltmeter 42 to be digitized. A computing part 50 converts the α-ray counting rate found in the path A into a value of the average voltage to be subtracted from the average voltage found in the path B, and the influence of the α-ray nuclide is removed thereby from a measured result.

公开(公告)号：JPH1164529A

公开(公告)日：1999-03-05

申请号：JP21867097

申请日：1997-08-13

Applicant: ALOKA CO LTD

Inventor： MATSUBARA SHOHEI

IPC: G01T1/167 ,  G01T1/178 ,  G01T7/04

Abstract: PROBLEM TO BE SOLVED: To provide a dust monitor for measuring concentration of an artificial radionuclide cleared of effects of natural radionuclides, without reference to an assortment of radiation as an object of measurement. SOLUTION: Alpha (α) rays, beta (β) rays and gamma (γ) rays from the dust collected on sampling filter paper 12 are detected by an α-β separation detector 20 and by a γ-ray detector 30. A pulse-height analyzing/counting part 34 detects γ-rays emitted by a β-decay daughter nuclide of radon by pulse-height discrimination. A simutaneous counting part 36 detects accurately β-decay events of the radon daughter nuclide by counting simultaneously the γ-rays and the β-rays detected by an α-β pulse-shape discrimination part 24 out of a signal of the detector 20. By multiplying a counting rate thereof by a conversion factor, an arithmetic processing part 50 estimates a counting rate originating in a radon decay series of radiation of a monitoring object assortment and this counting rate is subtracted from a total counting rate of the said assortment. A counting rate cleared of effects of the radon decay series can be thereby found, based on which air concentration of an artificial radionuclide can be found which is a monitoring object nuclide.