16 articles in this issue
Nguyen Duong Bo,Nguyen Hong Son,Tran Minh Tien
The Lieb nano-ribons with the spin-orbit coupling, the lattice modulation and the magnetic field are exactly studied. They are constructed from the Lieb lattice with two open boundaries in a direction. The interplay between the spin-orbit coupling, the la... see more
Nguyen Thi Hai Yen,Le Duc Anh,Hoang Anh Tuan,Nguyen Toan Thang,Nguyen Thi Huong
The Mott - Hubbard metal - insulator transition in the half-filled mass imbalanced ionic Hubbard model is investigated using the two-site dynamical mean field theory. We find that for a fixed mass imbalanced parameter r the critical interaction Uc increas... see more
Do Thi Nga
We present the microcanonical statistical model to study fragmentation of small neutral carbon clusters Cn (n = 9). This model describes, at a given energy, the phase space associated with all the degrees of freedom accessible to the system (partition of ... see more
Hoa Quang Do,V. Duong,N. T. H. Lien,V. M. Katarkevich
A Configuration of a second-order distributed feedback dye laser pumped by a nanosecond Nd:YAG laser is setup. The tuning range is narrower than that in the case of the first-order DFDL but lower noise and more stable is obtained. Single picoseconds pulse... see more
Pham Huy Thong,Nguyen Xuan Tu,Nguyen Van Diep,Pham Van Duong,Pham Hong Minh,Vu Thi Bich,O. A. Buganov,S. A. Tikhomirov,Marilou Cadatal-Raduban
We report on a Chirped Pulse Amplification (CPA)-based Titanium:Sapphire (Ti:Al2O3 or Ti:Sapphire) amplifier that uses a single grating stretcher and compressor configuration. The 8-pass amplifier configuration is able to yield 70 µJ pulse energy at 10 Hz... see more
Pham Van Duong,Nguyen Xuan Tu,Nguyen Van Diep,Minh Hong Pham,Nobuhiko Sarukura,Marilou Cadatal-Raduban
We report the successful development of an all-solid state laser based on a Czochralski method-grown cerium-doped lithium calcium aluminum fluoride (Ce3+:LiCaAlF6 or Ce:LiCAF) crystal as the gain medium. Results for the broadband, narrow linewidth and sho... see more
Dinh-V - Trung,Thanh Binh Nguyen,Duy Thang Dao,Van Hai Bui,Xuan Tu Nguyen,Minh Tien Pham,Phuong Dung Truong,T. T. Bao Nguyen
We present a simple method of making multichannel photon counting measurements of weak lidar signal from large ranges, using commonly available USB-based digital storage oscilloscopes. The single photon pulses from compact photomultiplier tubes are amplif... see more
Ngoc Long Hoang,Van Hop Nguyen,T. Nhuan Nguyen,Hanh Phuong Hoang
The vacuum stability conditions are implemented for the 3-3-1 model of observed fermion masses and mixings. We show that for the Higgs squared mass matrices, the condi- tions for semi-definition of the diagonal elements are most important since other cons... see more
Anastasia A. Golubtsova,Nguyen Hoang Vu
We study Wilson loops in the exact renormalization group ow at zero tempera- ture via the 5d holographic model that reproduces the behavior of the QCD running coupling. Calculating the time-like rectangular Wilson loop we show that the model includes a co... see more
N V Tiep,L. H. Khiem,A. S. Sohatsky,V. A. Skuratov,A. J. Van Vuuren,J. H. O'Connell,M. Zdorovets
Oxide dispersion strengthened (ODS) alloys are considered as candidates for fuel assembly claddings, since nano-oxides, among other things, contribute to the gas swelling suppression. However, it is still unknown that how oxides will behave in this capaci... see more
N. V. M. Trung,V. L. Smirnov,Le Hong Khiem
The IBA CP30 cyclotron was installed at the 108 Central Hospital in Hanoi, Vietnam. A proton beam with energy range from 15 to 30 MeV can be delivered by this facility. Currently, facility is mainly used for medical radioactive isotope production. There i... see more
T. V. Phuc,M. Kulik,A. P. Kobzev,L. H. Khiem
In this study we investigated depth distributions of elements in the multilayer structures of TiO2_2/SiO2_2/Si before and after ion irradiation. The samples were implanted with Ne+^+, Ar+^+, Kr+^+ and Xe+^+ ions. For each implantation the multilayer struc... see more
L. H. Khiem,V. D. Quan,T. T. M. Trinh,M. F. Frontasieva,D. P. T. Tien,L. D. Nam,N. N. Mai,N. H. Quyet,K. T. Hong,N. A. Son,T. T. Thanh,T. D. Trung,D. V. Thang
Air pollution in Vietnam, especially the pollution caused by metal elements are more severe due to the rapid growth of industrialization. The study of air pollution caused by metals elements is a hard and expensive work. Develoment of the simple and cheap... see more
N. H. Quyet,Le Hong Khiem,V. D. Quan,T. T. T. My,M. V. Frontasieva,N. T. B. My,L. D. Nam,N. N. Mai,K. T. Hong,D. P. T. Tien,D. V. Thang,T. D. Trung,N. A. Son,T. T. Thanh
The aim of this paper was the application of statistical analysis including principal component analysis to evaluate heavy metal pollution obtained by moss technique in the air of Ha Noi and its surrounding areas and to evaluate potential pollution source... see more
Ngo Duy Tan,Bui Trong Tuyen,Pham Minh Tuan,Chu Xuan Huy,Dao Hong Khiem,Ngo Manh Tien,Thai Thi Bich Hong
The radiometric calibration procedure, applied on VNREDSat-1 raw data shall correct and minimize the radiometric non-uniform gain and offset, occurred by the nature of the optical payload. The procedure is based on the radiometric model, built to transfor... see more
Tran Ngoc Hung,Trung Van Dinh,Nguyen Thi Thanh Bao,Bui Van Hai,Pham Dong Bang
Shapes of circumstellar envelopes around mass losing stars contain information of the very inner region of the envelope where mass loss process takes place. It’s well known that the presence of a binary companion leads to strong influence on the structure... see more