scholarly journals Silicon drift detectors technology for high precision light Kaonic atoms spectroscopic measurements at the DA Φ NE collider

2021 ◽  
Author(s):  
M. Miliucci ◽  
M. Bazzi ◽  
D. Bosnar ◽  
M. Bragadireanu ◽  
M. Carminati ◽  
...  
Keyword(s):  
High Precision ◽  
Spectroscopic Measurements ◽  
Kaonic Atoms ◽  
Silicon Drift Detectors

Silicon Drift Detectors system for high precision light kaonic atoms spectroscopy

2021 ◽  
Author(s):  
Marco Miliucci ◽  
Alessandro Scordo ◽  
Diana Laura Sirghi ◽  
Aidin Amirkhani ◽  
Ata Baniahmad ◽  
...  
Keyword(s):  
High Precision ◽  
Kaonic Atoms ◽  
Silicon Drift Detectors

A liquid crystal variable retarder-based reflectance difference spectrometer for fast, high precision spectroscopic measurements

2014 ◽  
Vol 571 ◽  
pp. 543-547 ◽  
Author(s):  
Chunguang Hu ◽  
Pengfei Xie ◽  
Shuchun Huo ◽  
Yanning Li ◽  
Xiaotang Hu
Keyword(s):  
Liquid Crystal ◽  
High Precision ◽  
Spectroscopic Measurements

scholarly journals Disentangling stellar activity and planetary signals

2010 ◽  
Vol 6 (S276) ◽  
pp. 399-400
Author(s):  
Isabelle Boisse ◽  
François Bouchy ◽  
Guillaume Hébrard ◽  
Xavier Bonfils ◽  
Nuno Santos ◽  
...  
Keyword(s):  
High Precision ◽  
Planetary Systems ◽  
Stellar Surface ◽  
Stellar Activity ◽  
Spectroscopic Measurements ◽  
Active Star ◽  
Active Stars ◽  
Harmonic Decomposition ◽  
Spotted Stars ◽  
True Mass

AbstractHigh-precision radial-velocimetry (RV) is until now the more efficient way to discover planetary systems. Moreover, photometric transit search missions like CoRoT and Kepler, need spectroscopic RV measurements to establish the planetary nature of a transit candidate and to measure the true mass. An active star has on its photosphere dark spots and bright plages rotating with the star. These inhomogeneities of the stellar surface can induce a variation of the measurement of the RV, due to changes in lines shapes and not to a Doppler motion of the star (e.g. Queloz et al. 2001; Desort et al. 2007; Boisse et al. 2009). We study how the Keplerian fit used to search for planets in RV data is confused by spots and we test an approach to subtract RV jitter based on harmonic decomposition of the star rotation. We use simulations of spectroscopic measurements of rotating spotted stars and validate our approach on active stars monitored by high-precision spectrograph HARPS: CoRoT-7 and ι Hor.

scholarly journals New High-Precision Measurement of the Reaction Rate of the 18O(p, α)15N Reaction via THM

2009 ◽  
Vol 26 (3) ◽  
pp. 237-242 ◽  
Author(s):  
M. La Cognata ◽  
C. Spitaleri ◽  
A. M. Mukhamedzhanov ◽  
B. Irgaziev ◽  
R. E. Tribble ◽  
...  
Keyword(s):  
High Precision ◽  
Precision Measurement ◽  
Reaction Rate ◽  
Trojan Horse ◽  
High Precision Measurement ◽  
Spectroscopic Measurements ◽  
A Value ◽  
Trojan Horse Method ◽  
First Time ◽  
Measured Strength

AbstractThe 18O(p, α)15N reaction rate has been extracted by means of the Trojan-Horse method. For the first time the contribution of the 20-keV peak has been directly evaluated, giving a value about 35% larger than previously estimated. The present approach has allowed to improve the accuracy of a factor 8.5, as it is based on the measured strength instead of educated guesses or spectroscopic measurements. The contribution of the 90-keV resonance has been determined as well, which turned out to be of negligible importance to astrophysics.

High precision kaonic atoms X-ray spectroscopy at the DAФNE collider: The SIDDHARTA-2 experiment

2021 ◽  
Author(s):  
M. Miliucci ◽  
M. Bazzi ◽  
D. Bosnar ◽  
M. Bragadireanu ◽  
M. Carminati ◽  
...  
Keyword(s):  
High Precision ◽  
X Ray ◽  
Kaonic Atoms

High precision laser-RF spectroscopic measurements of the hyperfine structure of vanadium-51

1992 ◽  
Vol 179 (2) ◽  
pp. 103-110 ◽  
Author(s):  
H. El-Kashef ◽  
N. Ludwig
Keyword(s):  
Hyperfine Structure ◽  
High Precision ◽  
Spectroscopic Measurements

scholarly journals Silicon Drift Detectors’ Spectroscopic Response during the SIDDHARTA-2 Kaonic Helium Run at the DAΦNE Collider

2021 ◽  
Vol 6 (4) ◽  
pp. 47
Author(s):  
Marco Miliucci ◽  
Massimiliano Bazzi ◽  
Damir Bosnar ◽  
Mario Bragadireanu ◽  
Marco Carminati ◽  
...  
Keyword(s):  
High Precision ◽  
Field Configuration ◽  
Exotic Atoms ◽  
Good Energy Resolution ◽  
Large Area ◽  
Kaonic Atom ◽  
X Ray ◽  
Kaonic Deuterium ◽  
Good Energy ◽  
Silicon Drift Detectors

A large-area silicon drift detectors (SDDs) system has been developed by the SIDDHARTA-2 collaboration for high precision light kaonic atom X-ray spectroscopy at the DAΦNE collider of Istituto Nazionale di Fisica Nucleare—Laboratori Nazionali di Frascati. The SDDs’ geometry and electric field configuration, combined with their read-out electronics, make these devices suitable for performing high precision light kaonic atom spectroscopy measurements in the background of the DAΦNE collider. This work presents the spectroscopic response of the SDDs system during the first exotic atoms run of SIDDHARTA-2 with kaonic helium, a preliminary to the kaonic deuterium data taking campaign. The SIDDHARTA-2 spectroscopic system has good energy resolution and a 2 μs timing window which rejects the asynchronous events, scaling the background by a factor of 10−5. The results obtained for the first exotic atoms run of SIDDHARTA-2 prove this system to be ready to perform the challenging kaonic deuterium measurement.

Automatic measurement of SAED patterns from asbestos minerals

1988 ◽  
Vol 46 ◽  
pp. 846-847
Author(s):  
J. C. Russ ◽  
T. Taguchi ◽  
P. M. Peters ◽  
E. Chatfield ◽  
J. C. Russ ◽  
...  
Keyword(s):  
Diffraction Pattern ◽  
High Precision ◽  
Diffraction Data ◽  
Automatic Measurement ◽  
Automatic Method ◽  
Important Method ◽  
X Ray ◽  
Integrated Intensity ◽  
Asbestiform Minerals ◽  
True Center

Conventional SAD patterns as obtained in the TEM present difficulties for identification of materials such as asbestiform minerals, although diffraction data is considered to be an important method for making this purpose. The preferred orientation of the fibers and the spotty patterns that are obtained do not readily lend themselves to measurement of the integrated intensity values for each d-spacing, and even the d-spacings may be hard to determine precisely because the true center location for the broken rings requires estimation. We have implemented an automatic method for diffraction pattern measurement to overcome these problems. It automatically locates the center of patterns with high precision, measures the radius of each ring of spots in the pattern, and integrates the density of spots in that ring. The resulting spectrum of intensity vs. radius is then used just as a conventional X-ray diffractometer scan would be, to locate peaks and produce a list of d,I values suitable for search/match comparison to known or expected phases.

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