Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Hiroko Tawara"'
Autor:
Kiwamu Saito, Yuya Endo, Shogo Nakamura, Tomiyoshi Haruyama, Shinichi Sasaki, Keiko Fujii, Katsuyu Kasami, Yui Torigoe, Hiroko Tawara, Satoshi Mihara
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 795:293-297
The emission spectrum of cryogenic liquid xenon in the vacuum ultraviolet region was measured by irradiating liquid xenon with gamma-rays from a radioactive source. To achieve a high signal-to-noise ratio, we employed coincident photon counting. Addi
Publikováno v:
Radiation Measurements. 46:709-716
A PAssive Dosimeter for Life-science Experiments in Space (PADLES) has been developed for measuring total absorbed dose and dose equivalents in the radiation environments of the International Space Station (ISS) where the Linear Energy Transfer (LET)
Publikováno v:
IEEE Transactions on Nuclear Science. 57:1282-1286
The average energy required to produce one scintillation photon Ws was determined for 662 keV gamma rays in CsI(Tl), CsI(Na), PWO, BGO, YAP(Ce), LSO(Ce), GSO(Ce), CWO, and LaBr3(Ce) crystals from the number of photoelectrons measured by a combination
Autor:
Koichi Ogura, Nobuyuki Hasebe, Tadayoshi Doke, Hiroko Tawara, Tomoya Yamauchi, Nakahiro Yasuda, Satoshi Kodaira
Publikováno v:
Nuclear Instruments & Methods in Physics Research Section B. 267(10):1817-1822
We experimentally determined the suitable conditions of temperature and air pressure for measuring charge and mass compositions of heavy cosmic rays using CR-39 track detectors during long-duration, high-altitude balloon flights. The experiments were
Autor:
Satoshi Kodaira, Naoki Yasuda, M. Kurano, Nobuyuki Hasebe, Tadayoshi Doke, Hiroko Tawara, Koichi Ogura, Hajime Kawashima
Publikováno v:
Journal of the Physical Society of Japan. 78:142-145
A large scale observation program of ultra heavy nuclei (Z ≥30) in galactic cosmic rays (UH-GCRs) is planned with the use of solid-state track detectors (SSTD) such as CR-39 plastic and BP-1 glass on the International Space Station and on board lon
Autor:
Nakahiro Yasuda, Mitsuyo Masukawa, Keiichi Kitajo, Hiroko Tawara, Hidenori Kumagai, Aiko Nagamatsu
Publikováno v:
Japanese Journal of Applied Physics. 47:7324-7327
Antioxidant doped CR-39 detectors were loaded onto the STS-95 space shuttle mission (altitude: 574 km; inclination: 28.45°; flight duration: 8.9 days) for measuring the linear energy transfer (LET) distribution above 10 keV/µm for space radiation d
Autor:
M. Kurano, Shuya Ota, Naoki Yasuda, Tadayoshi Doke, Nobuyuki Hasebe, Satoshi Kodaira, Hiroko Tawara, K. Eda, Kazutoshi Takahashi
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 593:475-480
We have developed an automated scanning system for handling a large number of nuclear track etched detectors (NTEDs). The system consists of a magazine station for sample storage, a robotic sample loader, a high-speed wide-area digital imaging micros
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 581:119-122
We have studied the transfer of luminescence from He to Xe by adding a small amount of Xe to He. Luminescence spectra, scintillation yields and time profiles of the mixture were measured. The He/Xe mixture emitted scintillation photons in the 140–2
Autor:
Nakahiro Yasuda, Nobuyuki Hasebe, Shuya Ota, Koichi Ogura, Masashi Sato, Satoshi Kodaira, Hiroko Tawara, Tadayoshi Doke
Publikováno v:
Japanese Journal of Applied Physics. 46(8A):5281-5287
The capability of the CR-39 track detector for isotope identification was verified using 56Fe and 55Fe beams from the heavy ion accelerator HIMAC at NIRS. A CR-39 stack was exposed to 56Fe and 55Fe beams with the energies of 460 MeV/nucleon. Drastic
Autor:
Hiroko Tawara, Junko S. Hiraga, Hisashi Kitamura, Takeshi Takashima, Yoshihiro Uchida, Shingo Kurata, Masato Kikuchi, Yuichi Ozaki, Shintaro Kamada, Yukio Uchihori, Shogo Nakamura
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 573:236-239
Charge-coupled devices (CCDs) are widely used in X-ray astronomy as a focal plane detector for X-rays up to 10 keV. For future X-ray space missions, thick CCDs are being developed to improve the detection efficiency of high energy X-rays beyond 10 ke