OPTICAL SPECTROSCOPY | Radiation Sources

2005 ◽  
pp. 427-431
Author(s):  
C. Burgess
Keyword(s):  
Optical Spectroscopy ◽  
Radiation Sources

Investigation of the Light Yield Distribution in LYSO Crystals by the Optical Spectroscopy Method for the Electromagnetic Calorimeters of the COMET Experiment

2020 ◽  
Vol 23 (4) ◽  
pp. 374-385
Author(s):  
V. Kalinnikov ◽  
E. Velicheva ◽  
A. Grabtchikov ◽  
I. Khodasevich ◽  
V. Orlovich ◽  
...  
Keyword(s):  
Optical Spectroscopy ◽  
Luminescence Intensity ◽  
Gamma Spectroscopy ◽  
Light Yield ◽  
Data Handling ◽  
Correction Factors ◽  
Crystal Length ◽  
Individual Crystal ◽  
Radiation Sources ◽  
Electromagnetic Calorimeters

The distribution of the light yield and luminescence intensity along LYSO:Ce crystal length is investigated. These distributions, determined by different defects and emission centers of the dopant in the crystalline structure and its distribution along the length, is measured by two methods: the gamma spectroscopy using radiation sources and the optical spectroscopy using ultraviolet sources. It is shown that crystals have considerable variation of the light yield and luminescence intensity both over the length of an individual crystal (in the growing direction) and for different crystals. It is established that the correction factors for the segmented calorimeter of the COMET experiment can be obtained using optical spectroscopy methods. Consideration of the correction factors will significantly reduce an error of energy measurement in a segmented calorimeter during data handling.

Radiation Sources for Optical Spectroscopy

1971 ◽  
Vol 43 (6) ◽  
pp. 79A-85A ◽  
Author(s):  
AUGUST HELL
Keyword(s):  
Optical Spectroscopy ◽  
Radiation Sources

Underdense radiation sources: Moving towards longer wavelengths

2006 ◽  
Vol 133 ◽  
pp. 1173-1175
Author(s):  
C. A. Back ◽  
J. F. Seely ◽  
J. L. Weaver ◽  
U. Feldman ◽  
R. Tommasini ◽  
...  
Keyword(s):  
Radiation Sources

Radiation of Charge Moving Between Two Planar Periodic Wire Structures

2020 ◽  
Vol 23 (1) ◽  
pp. 66-71
Author(s):  
E. A. Gurnevich ◽  
I. V. Moroz
Keyword(s):  
Angular Distribution ◽  
Charged Particle ◽  
Research And Development ◽  
High Power ◽  
Free Electron ◽  
Radiation Intensity ◽  
Free Electron Lasers ◽  
Radiation Sources ◽  
Power Radiation ◽  
High Power Radiation

The Smith-Purcell radiation of a charged particle moving in a periodic structure is analysed theoretically. The considered structure consists of two planar diffraction gratings with different periods which are formed by parallel conducting wires. The analytical expression for the spectral-angular distribution of radiation is obtained. It is shown that the angular distribution of radiation can be made narrower by using two gratings instead of one, and radiation intensity can be manipulated by parallel relative shift of gratings. The obtained results are of great importance for the research and development of high power radiation sources based on volume free-electron lasers.

Comparison of Lead, Copper and Aluminium as Gamma Radiation Shielding Material through Experimental Measurements and Simulation Using MCNP Version 4c

2018 ◽  
Vol 9 (08) ◽  
pp. 20193-20206 ◽  
Author(s):  
Md. Akhlak Bin Aziz ◽  
Md. Faisal Rahman ◽  
Md. Mahidul Haque Prodhan
Keyword(s):  
Gamma Radiation ◽  
Sodium Iodide ◽  
Experimental Approach ◽  
Radiation Shielding ◽  
Test Material ◽  
Simulation Techniques ◽  
Radiation Sources ◽  
Simulation Monte Carlo ◽  
Shielding Material ◽  
Code Version

The paper compares  Lead, Copper and Aluminium as gamma radiation shielding material using both experimental and simulation techniques. Cs- 137 (662KeV), Na-22 (511KeV) and Na- 22(1274KeV) were used as gamma radiation sources and a sodium iodide (NaI) detector was used to detect the radiation. Variations were noted for detected gamma count rates by changing shielding material thickness. In the experimental approach, thickness was varied by placing sheets of a particular test material one by one. For simulation, Monte Carlo n- Particle (MCNP) code version 4c was used and the geometry of the whole experimental setup was plotted in it. The results were then compared for each test material and it was found that lead is the best shielding material for gamma radiation followed by copper and aluminium.

CIE 239:2020 Goniospectroradiometry of Optical Radiation Sources

2020 ◽  
Author(s):  
J. Pan ◽  
T. Bergen ◽  
P. Blattner ◽  
J. Campos-Acosta ◽  
T. Goodman ◽  
...  
Keyword(s):  
Optical Radiation ◽  
Radiation Sources
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