Refereed Journal
Papers
(1)
George Belev, Safa Kasap, J.A.
Rowlands, David Hunter and Martin Yaffe.(2007) Dependence of the
electrical properties of stabilized a-Se on the preparation conditions
and the development of a double layer x-ray detector structure, Current
Applied Physics (in press)
(2)
Wee Chong Tan , George Belev,
K. Koughia, Robert Johanson, Stephen K. O’Leary and Safa Kasap. (2007)
Optical Properties Vacuum Deposited and Chlorine Doped a -Se Thin
Films: Aging Effects, Journal of Materials Science: Materials in
Electronics, 18 (1), 429-433.
(3)
David M. Hunter, Gueorgui Belev,
Giovanni DeCrescenzo, Safa O. Kasap, James G. Mainprize, J. A.
Rowlands, Charles Smith, Tümay Tümer, Vladimir Verpakhovski,
Shi Yin, Martin J. Yaffe. (2007) The Dependence of the Modulation
Transfer Function on the Blocking Layer Thickness in Amorphous Selenium
X-ray Detectors, Medical Physics 34 (8), 3358-3373.
(4)
Shimakawa K., Fukami K., Kishni
H., Belev G. and Kasap, S.O. (2007). X-ray Induced Effects on
Photocurrents in Amorphous Se Films, Japanese Journal of Applied
Physics, 46 (9), L192-L195.
(5)
G. Belev, D. Tonchev, B. Fogal, C. Allen, S.O. Kasap. (2006) Effects
of Oxygen and Chlorine on Charge Transport in Vacuum Deposited Pure
a-Se Films. Journal of Physics and Chemistry of Solids
68 (5-6), 972-977.
(6)
S.O. Kasap and G. Belev.
(2006), Progress in the Science and Technology of Direct Conversion
X-Ray Image Detectors: The Development of a Double Layer a-Se Based
Detector. Journal of Optoelectronics and Advanced Materials,
9 (1), 1-10.
(7)
G. Belev and S.O Kasap. (2006)
Reduction of the Dark Current in Stabilized a-Se Based X-ray detectors.
Journal of Non-Crystalline Solids, 352,
1616-1620.
(8)
K.V. Koughia, B.
Fogal, G. Belev, R.E. Johanson, S.O. Kasap. (2004) Density of States in the
Mobility Gap of Stabilized a-Se from Electron Time-of-Flight
Photocurrent Analysis, Journal of Non-Crystalline
Solids, 338-340, 569-573.
(9)
G. Belev, S.O. Kasap. (2004) Amorphous
Selenium as an X-ray Photoconductor, Journal of
Non-Crystalline Solids, 345&346, 484-488.
(10)
G.S. Belev, B. Fogal, K.V. Koughia, R.E. Johanson, S.O.
Kasap. (2003) Dependence of charge carrier ranges in
stabilized a-se on preparation conditions and alloying, Journal of Materials Science: Materials in Electronics, 14, 841-843.
(11)
S.O. Kasap, K.V.
Koughia, B. Fogal, G. Belev, R.E. Johanson. (2003) The Influence of Deposition Conditions and Alloying on the
Electronic Properties of Amorphous Se. Semiconductors, 37, 816-821.
(12)
S.O. Kasap, John
Rowlands, B. Fogal, M. Zahangir Kabir, G. Belev, N.
Sidhu, Brad Polischuk, Robert E. Johanson. (2002) Progress
in the Science and Technology of Direct Conversion a-Se Based X-ray
Sensors. Journal of Non-Crystalline Solids, 299-302, 988-992.
(13)
D. Tonchev, B. Fogal,
G. Belev, R.E. Johanson, S.O. Kasap. (2002) Properties of a-SbxSe1-x
Photoconductors. Journal of Non-Crystalline Solids,
299-302, 998-1001.
(14)
Bud Fogal, Robert E.
Johanson, George Belev, Stephen O’Leary, S.O. Kasap.
(2002) X-ray Induced Effects in Stabilized a-Se X-ray
Photoconductors. Journal
of Non-Crystalline Solids, 299-302, 993-997.
(15)
S. Tabakov, C. Roberts, F.
Milano, N. Sheahan, V. Tabakova, K. Velkova, A. Litchev, G. Stoilov, G.
Petrova, G. Spassov, M. Yaneva, L. Michova, E. Milieva, S. Kostianev,
N. Boyadjiev, G. Belev, N. Balabanov, M. Mitrkov, P.
Trindev, I. Daskalov, D. Pressianov and M. Nencev (1999)
Inter-university education centre and MSc. course in medical radiation
physics and engineering, J. Med. Biol. Eng. Comput., 37 (Suppl. 1), pp.
153–154.
(16)
H. Ponevski, G. Belev, G. Bojanov, Iv.
Iovchev, D. Tokmakov (1998) Measurement system for investigation of
dielectrics using selective polarization, Bulgarian Journal of Physics,
25, 256-263.
(17)
G. St. Belev, V.D. Cholacov, M.P. Mitrikov,
G.G. Nazarov, A.K. Srentz, B.P. Toskov, A.G. Belov
(1997) Power supply unit for the microwave system of the electron
accelerator “MICROTRON-MT25, Acta Polytechnica, 37, 27-32.
(18)
A. Antonov, G. Belev, V. Zhuchko, M. Mitrikov, A. Petrov,
Hr. Hristov, V. Cholakov (1997) “The measurement complex of the nuclear
physics laboratory MICROTRON at Paisii Hilendarski University, Plovdiv,
Reports of Bulgarian Nuclear Society, 2,
85-88.
(19)
G. Belev, E. Milieva, V. Videv, A. Srentz (1997) An
electric field stimulation study of smooth muscle samples from normal
and cancer cervix, Scripta Scientifica Medica, 29, 75-78.
(20)
V. Videv, E. Milieva,
G. Belev, A. Srentz (1997) The angle of
conization and the response of normal and
cancer cervix smooth muscle samples to KCl depolarization, Scripta
Scientifica Medica, 29, 79-82.
Proceedings
(21)
Belev G., Tonchev D., and Kasap S.O. (2007). The Effects of doping
with elements from the IIa group on the thermal and electronic
properties of amorphous selenium, Proceedings of NATO-ASI,
Functionalized Nanoscale Materials, Devices, and Systems for chem.-bio
Sensors, Photonics, and Energy Generation, Sinaya, Romania.
(22)
David M. Hunter, Gueorgui Belev, Giovanni DeCresenzo, Safa O. Kasap, James
G. Mainprize, Gordon Mawdsley, John A. Rowlands, Charles Smith, Tumay
O. Tumer, Vladimir Verpakhovski, Shi Yin, Martin J. Yaffe. (2004) High-resolution (20 cycles/mm) digital x-ray mammography
using amorphous selenium directly coupled to CCD readout devices. Proceedings of the SPIE, 5368, 466-477.
(23)
Karim, Karim S.; Vygranenko,
Yurii K.; Avila-Muñoz, Alfredo; Striakhilev, Denis A.; Nathan,
Arokia; Germann, Stephen; Rowlands, John A.; Belev, George;
Koughia, Cyril; Johanson, Robert; Kasap, Safa O. (2003) Active
pixel image sensor for large-area medical imaging.
Proceedings of the SPIE, 5030,
38-47.
(24)
Belev, G.S.; Nedev, S.R.; Hristov,
M.T.; and Tonchev D. (1999) Automated apparatus for measurement of the
surface density of electrical charges, Proceedings of Thin
Film Materials and Devices. Tenth
International School on Condensed Matter Physics, Varna, Bulgaria.
(25)
A. Antonov, A. G. Belov, G. Belev,
J. Edrev, Hr. Hristov, M. Mitrikov, S. Marinova,
and A. Srentz. (1997) Analysis of coal and products of coal
combustion by nuclear physical methods, Proceedings of 3rd
General Conference of the Balkan Physics Union,
Cluj-Napoca, Romania, p.420.
(26)
N. Balabanov, A. Srentz, Hr. Hristov, G. Belev, P. Balabanova, and P. Zapryanova
(1997), Investigation of water and soil samples from the region around
the upper flow of Arda river for natural and technological
radioactivity”, Proceedings of 3rd General Conference of
the Balkan Physics Union, Cluj-Napoca, Romania, p.400.
(27)
A. K. Srentz,
N. Balabanov, Chr. G. Christov, G. S. Belev,
P. N. Balabanova, and P.S.Zaprianova. (1997) Quelques
caracteristique physiques des sites naturals surveilles aux environ de
la ville de Smolian, International Symposium: Observation
of Mountain Environment in Europe, Borovetz, Bulgaria.
(28)
A. Antonov, G. Belev, J. Edrev, Hr.
Hristov, M. Mitrikov, and A. Srentz (1996) Some radiometric
investigation of the environment related
to the Chernobyl accident, Proceedings of International
Conference 10 years From the Chernobyl Nuclear Accident, Sofia,
Bulgaria.
Patents
(29)
Gueorgui Belev and Safa O. Kasap. (2005) Dark
Current Reduction in Metal/a-Se/Metal Structures for Application as an
X-ray Photoconductor Layer in Digital Image Detectors. International PCT Patent Application, PCT/CA2006/000004,
international filing date 04/01/2006, priority date 18/01/2005.
