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20. Quasars Can just Be White Holes in the Vector Model for
Gravitational Field
Vo Van On
Thu Dau Mot University, 230 Đại lộ Bình Dương, Tỉnh Bình Dương
In this paper we prove that quasars can just be while holes in the
vector model for gravitational field and thus the controversial
properties of quasars as high redshift and extraordinarily high
luminosity can be clear.
Báo cáo Treo
21. Calculation of Thermal and Epithermal Neutron Self-shielding
Factors Using the Monte Carlo Code –MCNP
Phu Chi Hoa (1), Vuong Huu Tan (2), Pham Ngoc Son (3),
Huynh Xuan Lam (1)
(1) The University of Dalat, 01 Phu Dong Thien Vuong, Dalat,
(2) Vietnam Atomic Energy Institute, 59 Ly Thuong Kiet, Hanoi,
(3) Nuclear Research Institute, 01 Nguyen Tu Luc, Dalat
Neutron activation measurement is often performed in a reactor
neutron spectrum. When the size of the irradiation sample is not
small enough and resonance pecks present in the cross section of the
sample nuclide, the thermal and resonance self-shielding effects of
neutron flux in the sample must be considered for correction. In this
work, the Monte Carlo code MCNP has been applied for calculation
of the self-shielding factors for several standard samples and
neutron monitors that are often used in neutron activation
measurements. The results of calculation are tabulated with different
sample thickness in comparison with experimental and calculated
values from the literature.
Báo cáo Treo
22. The Specific Heat CV of the System of the Q- Deformed
Harmonic Oscillarors
Luu Thi Kim Thanh (1), Tran Thai Hoa (1), Nguyen Dinh
Tuan (1), Duong Dai Phuong (2)
(1) Hanoi pedagogical university no.2, Xuan Hoa, Me Linh, Vinh
Phuc
(2) Miliary College of Tank- Armour Officer
We investigate some physical content of the q- deformed harmonic
oscillator, with q is real and q is a phase factor. The expression for
the statistical sum and the average energy of one q- deformed
harmonic oscillator are derived, we have caculated the specific heat
Cv of the once mol of the q- deformed harmonic oscillator.
Báo cáo Treo
23. Inelastic Scattering of Polarized Neutrons in Magnetic Helicoidal
Structure Crystal in Presence of Radiation and Absorption of
Phonon
Le Phuong Thao and Nguyen Dinh Dung
Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi
In this report the effective cross- section of inelastic scattering of
polarized neutrons in magnetic helicoidal structure crystal in
presence of radiation and absorption of phonon is obtained and
discussed
Báo cáo Treo
24. Impact of CP Phases on the Gluino Production Process in
Electron- Positron Annihilation
Trieu Quynh Trang (1), Nguyen Thi Thu Huong (2), and Ha
Huy Bang (3)
(1) Nam Dinh teacher's tranning college (2,3) Ha Noi University of
Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi
The gluino pair production process in electron- positron annihilation
into gluino pair has been considered within the Minimal
Supersymetric Standard Model (MSSM) with CP phases. In this
work, we have annalyzed effecs if finite CP phases on gluino pairproduction
in e +e- collisions at future high energy linear collider.
And we find that, the cross- section can be observed over most
ranges of MSSM parameter space.
Báo cáo Treo
Hội nghị Vật lý lý thuyết toàn quốc lần thứ 35
37
38
Tp. Hồ Chí Minh, 02-06/8/2010
25. The Glauber-type of Representation for the Scattering Amplitude
of the Dirac Particles on Smooth Potential .
Nguyen Suan Han (1) and Le Thi Hai Yen (1)
(1) Vietnam National University, Hanoi University of Sciences,
Faculty of Physics, Department of Theoretical Physics
By the functional integration method the deduction of the Glaubertype
representation for scattering amplitude of the spin ½ particles
on the smooth potential is performed. This method generalizing the
usual operation of taking the square of the Dirac equation is
proposed for obtaining the functional integral representation of the
amplitude. It has shown that the scattering amplititudes, which have
obtained by moving to shell mass, of normal Green function and
quadratic Green function are the same types, and taking into
account of spin of particles leads to new term which is responsible
for the spin flip in the scattering processes.
Báo cáo Treo
II. Vật lý các môi trường đông đặc, hệ thấp chiều, cấu
trúc nano
26. Condensation Kinetics of Polaritons in Semiconductor
Microcavities
Cao Huy Thien, Doan Tri Dung, and Tran Thoai Duy Bao
Viện Vật lý, Thành phố Hồ Chí Minh, Số 1 Mạc Đĩnh Chi, Thủ Đức,
Tp. Hồ Chí Minh
The excited polaritons relax by phonon and polariton – polariton
scattering to the ground state. At sufficiently low temperatures and
sufficiently strong pumping a condensation in the ground state
occurs
which is directly observable in terms of an onset of laser action of
the lowest photon mode of the cavity. Our recent theoretical studies
for a finite-size Bose Einstein condensation of polaritons are
reviewed.
Báo cáo Mời
27. Frequency-Dependent Linear and non-linear Response
Properties of Semiconductor Quantum wires
Nguyen Nhu Dat
Institute of Physics, Vietnam Academy of Science and Technology, 10
Dao Tan, Ba Dinh, Ha Noi
Linear and non-linear optical response of semiconductor quantum
wires is studied. The influence of the confinement potential on the
optical properties of the wire is computed.
Báo cáo Treo
Hội nghị Vật lý lý thuyết toàn quốc lần thứ 35
39
40
Tp. Hồ Chí Minh, 02-06/8/2010