12 articles in this issue
Pham Tri Nang,Pham Xuan Yem
The recent BaBar measurements of the γ+γ∗→π0" role="presentation" style="position: relative;">?+?*?p0?+?*?p0\gamma +\gamma ^{ * } \to \pi ^{0 } form factor show spectacular deviation from perturbative QCD computati... see more
Nguyen Quang Hung,Dang Thi Dung,Tran Dinh Trong
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Nguyen Van Thanh,Nguyen Thi Nguyet Anh,Nguyen Anh Tuan
We present a density functional study on the geometric structure, electronic structureand spin transition of a series of Fe2+ spin-crossover molecules, i.e., [Fe(abpt)2(NCS)2] (1),[Fe(abpt)2(NCSe)2] (2), and [Fe(abpt)2(C(CN)3)2] (3) with abpt = 4-amino-3,... see more
Le Thi Hong Lien,Vu Ngoc Tuoc,Nguyen Thi Thuong
We present a semi-abinitio - Density Functional Based Tight Binding (DFTB) study on the atomic and electronic structure of ZnS Nanowire (NW) and examine the dependence of surface stress on nanowire lateral size and shape. The ZnS wurtzite wire size ranges... see more
Dinh Nhu Thao,Nguyen Thanh Tien
We present a calculation of the distribution of two-dimensional electron gas (2DEG)along the quantization direction in an AlGaN/GaN modulation-doped heterostructure (MDHS).The main con?nement sources from ionized donors, 2DEG and polarization charges are ... see more
Pham Dinh Tam,Pham Duy Tan,Nguyen Quang Hoc
By applying the model of pair interaction, the model of central atom, the method of coordination sphere and the statistical moment method, we calculate the free energy of ß- CuZn ordered alloy and determine the dependence of ordered parameter and la... see more
Dinh Xuan Khoa,Chu Van Lanh
In the paper the set of dimensionless rate equations for the pump, Stokes and anti-Stokes powers in the trio-cavity Raman laser pumped by pulsed Gaussian beam is introduced. By numerical Runger-Kuta method, those equations are resolved and the optimal nor... see more
Nguyen Van Phu,Dinh Van Hoang,Le Ngoc Anh
In this report we demonstrate the transformation of the photon density curves in operation of a three modes random laser when the gain coefficients of modes depending on time.Supposing gain coefficients having Gaussian profile and using Matlab language, w... see more
Bui Van Hai,Dinh Van Trung,Nguyen Xuan Tuan,Dao Duy Thang,Nguyen Thanh Binh
Abstract. Cirrus clouds in the upper troposphere and the lower stratosphere have attracted great attention due to their important role and impact on the atmospheric radioactive balance. Because cirrus clouds are located high in the atmosphere, their study... see more
Nguyen Van Hiep,Pham Tuan Anh,Pham Ngoc Diep,Pham Ngoc Dong,Do Thi Hoai,Pham Thi Tuyet Nhung,Nguyen Thi Thao,Pierre Darriulat
A small radio telescope (SRT) has been installed on the roof of the Hanoi astrophysics laboratory VATLY. It is equipped with a 2.6 m diameter mobile parabolic dish remotely controlled in elevation and azimuth and with super-heterodyne detection around the... see more
Dang Quang Thieu,Tran Ngoc Toan,Nguyen Thi Bao My,Nguyen Van Sy,Vu Van Tien,Nguyen Thi Thuy Mai,Le Dinh Cuong
We report on the design and construction of an Early Warning Environmental Radiation Monitoring Station (EWERMS), used ONLINE in the environmental radiation monitoring and early warning network. It has a high sensitivity and can send a prompt alarm ... see more
Pham Thi Thanh Nga,Nguyen Toan Thang
ERRATUM: Néel State in the Fermionized Spin 12\frac{1}{2} Heisenberg Antiferromagnet on Hypercubic and Triangular Lattices [Pham Thi Thanh Nga and Nguyen Toan Thang, Comm. Phys. 22\textit{Comm. Phys. } \textbf{22} (1) (2012) 33]