Zobrazeno 1 - 10
of 288
pro vyhledávání: '"Daiji, KATO"'
Publikováno v:
Nuclear Materials and Energy, Vol 38, Iss , Pp 101614- (2024)
Photoluminescence (PL) properties of Er2O3 specimens were examined by using visible lasers (532 nm and 635 nm) and a UV LED light source (365 nm) to investigate the applicability for irradiation damage monitoring of materials in fusion reactors. Both
Externí odkaz:
https://doaj.org/article/1ea3b11ccc6b4a0c9d62b3a2071ba9f2
Autor:
Tetsutarou Oishi, Shigeru Morita, Daiji Kato, Izumi Murakami, Hiroyuki A. Sakaue, Motoshi Goto, Yasuko Kawamoto, Tomoko Kawate, Ryota Nishimura, Hiroyuki Takahashi, Kenji Tobita
Publikováno v:
Nuclear Fusion, Vol 64, Iss 10, p 106011 (2024)
Spectroscopic studies of emissions released from tungsten ions combined with a pellet injection technique have been conducted in Large Helical Device for contribution to the tungsten transport study in tungsten divertor fusion devices and for expansi
Externí odkaz:
https://doaj.org/article/136c6985b3f743cc85ede820d224c93c
Autor:
Naoki Kimura, Yoshiki Miya, Daiki Ito, Priti, Daiji Kato, Masaaki Baba, Susumu Kuma, Toshiyuki Azuma, Nobuyuki Nakamura
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 12 (2024)
The extreme-ultraviolet emission line (424 Å) of the intercombination 1 s ^2 2 s ^2 ^1 S _0 –1 s ^2 2 s 2 p ^3 P _1 transition of Ar xv can potentially characterize the electron temperature of astrophysical plasma. Various theoretical studies have
Externí odkaz:
https://doaj.org/article/e99f00d5b76f4226b334cc18d8360146
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 64 (2024)
We investigate early ( t < 1 day) kilonova from a neutron star merger by deriving atomic opacities for all the elements from La to Ra ( Z = 57–88) ionized to the states V–XI. The opacities at high temperatures for the elements with open f -shells
Externí odkaz:
https://doaj.org/article/7ee29a66042a4333830fb61533c9b8ed
Publikováno v:
Nuclear Materials and Energy, Vol 31, Iss , Pp 101157- (2022)
To understand the interaction of hydrogen isotopes with VC and Cr23C6 precipitates, in reduced-activation ferritic/martensitic steel (F82H), we have performed first-principles calculations based on density functional theory. Energy calculations and e
Externí odkaz:
https://doaj.org/article/bd41463349e94bb0a7395fe33475d4ee
Autor:
Shintaro Hirayama, Koichi Sato, Daiji Kato, Hirotomo Iwakiri, Masatake Yamaguchi, Yoshiyuki Watanabe, Takashi Nozawa
Publikováno v:
Nuclear Materials and Energy, Vol 31, Iss , Pp 101179- (2022)
The hydrogen binding energy to vacancies or vacancy-carbon complexes in α-Fe under uniaxial tensile strain was calculated using the density functional theory. The solution energies of hydrogen and carbon decreased with an increase in the uniaxial te
Externí odkaz:
https://doaj.org/article/779440730fe143e79e635e5a66bad78e
Autor:
Priti, Kota Inadome, Mayuko Funabashi, Nobuyuki Nakamura, Hiroyuki A. Sakaue, Izumi Murakami, Daiji Kato
Publikováno v:
Atoms, Vol 11, Iss 3, p 57 (2023)
To provide spectroscopic data for W13+, the present work is focused on the analysis of spectra observed in the visible range, using a compact electron beam ion trap (CoBIT). Line identification is done by using a collisional radiative model, along wi
Externí odkaz:
https://doaj.org/article/8ae4e999a34b4dd8b6313038ec47a1bf
Autor:
Chihiro Suzuki, Fumihiro Koike, Izumi Murakami, Daiji Kato, Naoki Tamura, Tetsutarou Oishi, Nobuyuki Nakamura
Publikováno v:
Atoms, Vol 11, Iss 2, p 33 (2023)
This study has systematically investigated the atomic number (Z) dependence of spectra from gallium-like (Ga-like) ions of heavy elements. We have mainly analyzed the experimental spectra recorded in high-temperature plasmas produced in the Large Hel
Externí odkaz:
https://doaj.org/article/3a6de18bbfd244718afd422e27db97fc
Autor:
Yuki Nishimura, Saki Imaizumi, Hajime Tanuma, Nobuyuki Nakamura, Yuichiro Sekiguchi, Shinya Wanajo, Hiroyuki A. Sakaue, Daiji Kato, Izumi Murakami, Masaomi Tanaka, Gediminas Gaigalas
Publikováno v:
Atoms, Vol 11, Iss 2, p 40 (2023)
The origin of heavier elements than iron is still under discussion, and recent studies suggest that the contribution of the r-process in neutron star mergers is dominant. Future modeling of such processes will require a huge amount of spectroscopic d
Externí odkaz:
https://doaj.org/article/1d6bf4723e964d5491b98b31839a4d74
Autor:
Nanae Domoto, Jae-Joon Lee, Masaomi Tanaka, Ho-Gyu Lee, Wako Aoki, Miho N. Ishigaki, Shinya Wanajo, Daiji Kato, Kenta Hotokezaka
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 113 (2023)
Kilonova spectra provide us with information of r -process nucleosynthesis in neutron star mergers. However, it is still challenging to identify individual elements in the spectra mainly due to the lack of experimentally accurate atomic data for heav
Externí odkaz:
https://doaj.org/article/4bec255a384f4ab49587cfa56cb17cfd