Zobrazeno 1 - 10
of 80
pro vyhledávání: '"M. Irako"'
Autor:
M. Surchat, M. Irakoze, R. Hansmann, S. Kantengwa, M. Konlambigue, L. Späth, B. Wilde, J. Six, P. Krütli
Publikováno v:
World Development Sustainability, Vol 3, Iss , Pp 100094- (2023)
Today, most African countries have dysfunctional municipal waste management system, negatively impacting the environment and human health. However, as most of this waste is recyclable, informal actors are making their income out of the collection/sor
Externí odkaz:
https://doaj.org/article/3e571e09d3d44c46af04776bc11a6bb7
Autor:
K. Workman, J. Factor, W. Asimwe, D. Subuhoro, H. Gashema, M. Irakoze, S. Nsanzimana, D. J. Riedel
Publikováno v:
Rwanda Medical Journal, Vol 78, Iss 2, Pp 35-39 (2021)
INTRODUCTION: Injection drug use (IDU) is a high-risk practice for acquiring and transmitting HIV and other blood-borne infections. While many studies have been conducted in the U.S.A, Europe, and Southeast Asia, IDU is less well-recognized in sub-Sa
Externí odkaz:
https://doaj.org/article/262bc28cb78d412cb38cccd803a69862
Autor:
T. Kumita, M. Irako, K Wada, H. Iijima, Tachishige Hirose, Masakazu Washio, K. Kadoya, T. Asonuma, B. Matsumoto
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 483:641-648
On the basis of velocity modulation, we have developed a positron-beam buncher for the measurement of ortho-positronium lifetime τ o−Ps and TOF. Since high permeability cores were used, the buncher was constructed compactly and was used to efficie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b47d270c198a720749c93b8e62595721
https://doi.org/10.1016/s0168-9002(01)01948-9
https://doi.org/10.1016/s0168-9002(01)01948-9
Autor:
K. Kadoya, Hiroyuki Yabu, Keiji Wada, Tachishige Hirose, N.N. Mondal, T. Kumita, Katsuyuki Kobayashi, Masatoshi Kajita, M. Irako, B. Matsumoto
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 192:171-175
We have been theoretically and experimentally studying details of laser cooling of ortho-positronium. Experimental apparatus consists of a pulsed positron beam generator, a long pulse wide bandwidth ultraviolet laser and a time-of-flight system to me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb26bbbef222af8eac36fbd3e125ba74
https://doi.org/10.1016/s0168-583x(02)00863-7
https://doi.org/10.1016/s0168-583x(02)00863-7
Autor:
Hiroyuki Yabu, Tachishige Hirose, M. Irako, Masatoshi Kajita, H. Iijima, Kazuyuki Wada, T. Kumita
Publikováno v:
Journal of the Physical Society of Japan. 70:3255-3260
On the basis of three dimensional (3-D) Monte Carlo simulation, we studied details of laser cooling (Doppler cooling) of ortho-Positronium ( o -Ps) which would be applied to the achievement of Bose...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3deec8a09a5eed48fa9edae8098f5900
https://doi.org/10.1143/jpsj.70.3255
https://doi.org/10.1143/jpsj.70.3255
Autor:
R. Hamatsu, M. Irako, N. Kawasaki, Tachishige Hirose, Masataka Hirose, T. Kumita, Masami Chiba, Jinfeng Yang
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 440:172-180
A polarimeter which utilizes ortho-positronium quenching in a magnetic field is used to measure polarization of slow positron beams. This polarimeter is employed for a polarization measurement at an e+ beam system where the beam is provided from the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b36e9dda1b4dee69767880aa3d473bd2
https://doi.org/10.1016/s0168-9002(99)00896-7
https://doi.org/10.1016/s0168-9002(99)00896-7
Autor:
Masatoshi Kajita, N.N. Mondal, Jun'ichi Kaneko, M. Irako, H. Iijima, Tachishige Hirose, T. Kumita, Katsuyuki Kobayashi, Okada Yasuhiro, Yoshiyuki Igura
Publikováno v:
Applied Surface Science. 149:106-109
A cloud of ortho-positronium produced at the room temperature can be cooled down to 0.6 K utilizing a long pulse (180 ns) laser with 243 nm wavelength. We developed a time bunching system of a slow positron beam to synchronize production of positroni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::045494abe48f32c781578910dcece8c5
https://doi.org/10.1016/s0169-4332(99)00182-8
https://doi.org/10.1016/s0169-4332(99)00182-8
Autor:
M. Irako, Takuro Nishimura, Kiyohiko Naka, Ryosuke Ogata, Masami Chiba, Tachishige Hirose, T. Kumita, Shinya Matsuo, R. Hamatsu
Publikováno v:
Applied Surface Science. 149:276-281
Positronium (Ps) is a bound state of an electron and a positron, which annihilates into photons. It is a suitable place to study the quantum electrodynamics (QED) since strong and weak interactions are negligibly small in the annihilation processes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c11ede6fd2c101a213e58cf33ab26a8
https://doi.org/10.1016/s0169-4332(99)00215-9
https://doi.org/10.1016/s0169-4332(99)00215-9
Autor:
H. Iijima, M. Irako, T. Kumita, Tsunehiko Omori, N.N. Mondal, Y Igura, Tachishige Hirose, R. Hamatsu
Publikováno v:
Applied Surface Science. 149:269-275
To investigates the low energy positronium (Ps) production in terms of target temperatures and materials, surface condition and so on, we adopt the time-of-flight (TOF) method and perform extensive Monte Carlo simulation to design an apparatus. Under
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd77e76511e9810285223666ae665ca2
https://doi.org/10.1016/s0169-4332(99)00214-7
https://doi.org/10.1016/s0169-4332(99)00214-7
Autor:
Masataka Hirose, K Matsuzawa, Tachishige Hirose, R. Hamatsu, N.N. Mondal, H. Iijima, T. Kumita, M. Irako
Publikováno v:
Applied Surface Science. 149:16-19
We have constructed a bunched beam generator of polarized slow positrons, namely TOPPS-II (Tokyo Metropolitan University Polarized Positron Beam System) using the magnetic transportation. The positrons emitted from 100 mCi 22 Na are implanted on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99810ea47e0eff35478e6a74ab719328
https://doi.org/10.1016/s0169-4332(99)00183-x
https://doi.org/10.1016/s0169-4332(99)00183-x