S
S. Sabchevski
Researcher at Bulgarian Academy of Sciences
Publications - 13
Citations - 77
S. Sabchevski is an academic researcher from Bulgarian Academy of Sciences. The author has contributed to research in topics: Hyperfine structure & Ceramic. The author has an hindex of 4, co-authored 12 publications receiving 63 citations.
Papers
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Journal ArticleDOI
Rapid Sintering of Silica Xerogel Ceramic Derived from Sago Waste Ash Using Sub-millimeter Wave Heating with a 300 GHz CW Gyrotron
H. Aripin,Seitaro Mitsudo,I Nyoman Sudiana,S. Tani,K. Sako,Yutaka Fujii,Teruo Saito,Toshitaka Idehara,S. Sabchevski +8 more
TL;DR: In this paper, a microwave sintering of a silica-glass ceramic, produced from the sago waste ash, has been discussed, and the influence of the sinting temperature on the technological properties such as porosity and bulk density was studied in detail.
Journal ArticleDOI
Direct Measurement of Positronium HyperFine Structure: ∼ A New Horizon of Precision Spectroscopy Using Gyrotrons ∼
Shoji Asai,Takayuki Yamazaki,A. Miyazaki,Taikan Suehara,Toshio Namba,Tomio Kobayashi,Haruhiko Saito,Takatoshi Idehara,Isamu Ogawa,S. Sabchevski +9 more
TL;DR: In this paper, the transition from ortho-positronium to para-positionionium has been observed with 5 σ CL, which is the first observation of M1 transition in (sub)Terahertz region.
Journal ArticleDOI
Microstructural and Thermal Properties of Nanocrystalline Silica Xerogel Powders Converted from Sago Waste Ash Material
H. Aripin,Seitaro Mitsudo,I. N. Sudiana,Endangsusilowati S. Prima,K. Sako,Yutaka Fujii,Teruo Saito,Toshitaka Idehara,S. Sano,Bambang Sunendar Purwasasmita,H. Hernawan,S. Sabchevski +11 more
TL;DR: In this article, the properties of nanocrystalline silica xerogel (NSX) powders were characterized on the basis of the experimental data obtained using thermal analysis (DSC/TGA), X-ray diffraction (XRD), Infrared and Raman spectroscopy.
Journal ArticleDOI
The Progress in the Studies of Mode Interaction in Gyrotrons
Journal ArticleDOI
The first direct measurement of the hyperfine splitting in positronium
Taikan Suehara,A. Ishida,Toshio Namba,Shoji Asai,T. Kobayashi,H. Saitot,M. Yoshida,Toshitaka Idehara,Isamu Ogawa,S. Kobayashi,S. Sabchevski +10 more
TL;DR: In this article, a new direct measurement system of the positronium hyperfine splitting was developed using a sub-THz gyrotron and a quasi-optical Fabry-Perot cavity.