Neon branching ratios for intensity calibration of high-resolution spectra

2001 ◽  
Author(s):  
Rolf Engleman
Keyword(s):  
High Resolution ◽  
Branching Ratios ◽  
Intensity Calibration

Design and Calibration of a 3D High-Resolution Surface Profiling System Using Photometric Stereo

2015 ◽  
Author(s):  
Boren Li ◽  
Tomonari Furukawa
Keyword(s):  
High Resolution ◽  
Light Intensity ◽  
Target Surface ◽  
Photometric Stereo ◽  
Radiometric Calibration ◽  
Geometric Calibration ◽  
Surface Profiling ◽  
Surface Normal ◽  
3D Methods ◽  
Intensity Calibration

This paper presents the design and calibration of a 3D high-resolution surface profiling system using photometric stereo (PS). This system is mainly composed of a high resolution DSLR camera with a macro lens facing perpendicularly to the target surface, and several LEDs tilting towards the surface constrained by a light fixture. With each LED turned on at a time to create one lighting direction, the camera fixed at the same position captures an image. PS with surface normal integration (SNI) are then performed to reconstruct the surface in 3D. Methods of four calibrations for the developed system are proposed to achieve better accuracy, which are the camera radiometric calibration, the camera geometric calibration, the light direction calibration and the light intensity calibration. Experiments have demonstrated that the developed system with the calibration processes could achieve the accuracy in the order of 10 microns.

scholarly journals Clustering in $^{18}$O - absolute determination of branching ratios via high-resolution particle spectroscopy

2020 ◽  
Author(s):  
Stuart Pirrie ◽  
Carl Wheldon ◽  
Tzany Kokalova ◽  
Jack Bishop ◽  
R. Hertenberger ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Excited State ◽  
High Resolution ◽  
Cluster Structure ◽  
High Energy ◽  
Branching Ratios ◽  
Light Nuclei ◽  
Decay Channels ◽  
Monte Carlo Techniques

The determination of absolute branching ratios for high-energy states in light nuclei is an important and useful tool for probing the underlying nuclear structure of individual resonances: for example, in establishing the tendency of an excited state towards \alphaα-cluster structure. Difficulty arises in measuring these branching ratios due to similarities in available decay channels, such as (\mathbf{^{18}}18O,\mathbf{n}𝐧) and (\mathbf{^{18}}18O,\mathbf{2n}2𝐧), as well as differences in geometric efficiencies due to population of bound excited levels in daughter nuclei. Methods are presented using Monte Carlo techniques to overcome these issues.

scholarly journals Calibration of the Echelle-Vidicon Combination of the Buss-Instrument

1977 ◽  
Vol 43 ◽  
pp. 30-30
Author(s):  
T. M. Kampermann
Keyword(s):  
High Resolution ◽  
Research Laboratory ◽  
Space Research ◽  
High Resolution Spectroscopy ◽  
Laboratory Measurements ◽  
Echelle Spectrograph ◽  
Intensity Calibration

For both observations and laboratory measurements the use of television-type detectors is increasing. The Space Research Laboratory at Utrecht is, in collaboration with Johnson Space Center at Houston, carrying out high resolution spectroscopy from a balloon borne observatory using an echelle spectrograph and a SEC-vidicon detector. The calibration of such a system is not trivial. This paper deals with the procedures required to achieve a proper intensity calibration of the system in use.

Low Angular Momentum States Populated in the Decay of 178Lu

1971 ◽  
Vol 49 (2) ◽  
pp. 270-276 ◽  
Author(s):  
S. C. Gujrathi ◽  
J. M. D'Auria
Keyword(s):  
Angular Momentum ◽  
High Resolution ◽  
Energy Range ◽  
Beta Decay ◽  
Decay Scheme ◽  
High Efficiency ◽  
Branching Ratios ◽  
Coincidence System ◽  
Γ Ray ◽  
Gamma Transitions

The low angular momentum states in 178Hf populated in the beta decay of the low spin state (T1/2 = 30 min) of 178Lu are investigated with both high resolution and high efficiency Ge(Li) detectors as well as a NaI(Tl)–Ge(Li) (γ,γ) coincidence system. The sources of 178Lu were produced through the 178Hf(n,p) and 181Ta(n,α) reactions on natural targets of hafnium and tantalum, respectively, using 14.8 MeV neutrons. Sixteen gamma transitions in the energy range 1090.8 to 1730.0 keV have been found to decay with the 30 min period of 178Lu. A decay scheme of 178Lu has been proposed with the excited levels in 178Hf at 93.17(2+), 306.59(4+), 1309.7(0+, 1±), 1362.7(0+, 1±, 2+), 1434.2(0+), 1442.9(0+), 1496.7(2+), 1514.2(2+), 1562.0(2+), 1772.1(0+, 1±, 2+), and 1823.2(0+, 1±, 2+) keV. The weak β-branching ratios and their log ft values are deduced from the observed γ-ray intensities and results thus obtained are discussed.

scholarly journals A new method for in-flight intensity calibration of high-resolution EUV and FUV spectrometers

2005 ◽  
Vol 441 (3) ◽  
pp. 1211-1215 ◽  
Author(s):  
U. Feldman ◽  
E. Landi ◽  
G. A. Doschek ◽  
J. T. Mariska
Keyword(s):  
High Resolution ◽  
New Method ◽  
Intensity Calibration
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