Optimization of CdZnTe low energy threshold utilizing readout ASIC charge pumping for the High-Resolution Energetic X-ray Imager SmallSat Explorer

2021 ◽  
Author(s):  
Daniel E. Violette ◽  
Jaesub Hong ◽  
Branden Allen ◽  
Jonathan E. Grindlay
Keyword(s):  
High Resolution ◽  
Low Energy ◽  
Energy Threshold ◽  
X Ray ◽  
Charge Pumping

Study of Delayed States in 94Nb, 108Ag, and 110Ag

1971 ◽  
Vol 49 (6) ◽  
pp. 747-755 ◽  
Author(s):  
S. C. Gujrathi ◽  
J. M. d'Auria ◽  
R. G. Korteling
Keyword(s):  
High Resolution ◽  
Level Scheme ◽  
Half Life ◽  
Gamma Transition ◽  
Low Energy ◽  
X Ray ◽  
Upper Limits ◽  
Energy Gamma ◽  
Gamma Transitions ◽  
First Time

The lifetimes and energies associated with low-energy gamma transitions from the 93Nb(n,γ)94Nb, 107Ag(n,γ)108Ag, and 109Ag(n,γ)110Ag reactions have been studied using a high-resolution Ge(Li) X-ray spectrometer. New weak transitions are observed in the decay of 110Ag at 30.84, 38.19, 41.78, and 136.65 keV, while intense gamma transitions at 105.6, 235.8, and 266.95 keV are resolved into doublets. The half-life of the state involving the intense 117.47 keV transition in 110Ag and the 215 keV transition in 108Ag is confirmed as 36.5 ± 2.0 ns and 54 ± 8 ns, respectively, while a new delayed state associated with the gamma transition of 99.404 keV (T1/2 = 30 ± 5 ns) in 94Nb is observed for the first time. The upper limits for the half-lives involving most of the intense transitions in all the three isotopes are also reported. A level scheme is proposed and discussed for 108Ag.

High resolution low energy X-ray microradiography using a CCD camera

2011 ◽  
Vol 6 (01) ◽  
pp. C01048-C01048 ◽  
Author(s):  
J Tous ◽  
P Horodysky ◽  
K Blazek ◽  
M Nikl ◽  
J A Mares
Keyword(s):  
High Resolution ◽  
Ccd Camera ◽  
Low Energy ◽  
X Ray

RESONANT INELASTIC SOFT X-RAY SCATTERING OF INSULATING CUPRATES

2002 ◽  
Vol 09 (02) ◽  
pp. 1103-1108 ◽  
Author(s):  
L.-C. DUDA ◽  
T. SCHMITT ◽  
J. NORDGREN ◽  
G. DHALENNE ◽  
A. REVCOLEVSCHI
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Lower Energy ◽  
High Energy ◽  
Low Energy ◽  
The Novel ◽  
Excitation Peak ◽  
X Ray ◽  
X Ray Scattering ◽  
Large Spread

We have performed high-resolution inelastic X-ray emission scattering experiments at the Cu 3p-, Cu 3s-, and O 1s-resonances of the insulating cuprates CuGeO 3, CuO, La 2 CuO 4, and SrCuO 2. We introduce the novel low-energy s-edge Cu-RIXS which reveals a dd-excitation peak, which was previously unobserved due to insufficient resolution and intensity in high-energy (Cu 1s RIXS). Also, O 1s-RIXS of all cuprate sample is investigated. Surprisingly, there is a large spread in the energy loss values of the RIXS features for different compounds and we explain this by assigning the larger energy features to the occurrence of a Zhang–Rice singlet while the lower energy feature (only observed for CuGeO 3) is assigned to a dd-excitation.

Development of a low-energy high resolution X-ray camera for high-energy gamma photon background environments

2017 ◽  
Vol 54 (9) ◽  
pp. 933-939
Author(s):  
Koki Ando ◽  
Seiichi Yamamoto ◽  
Keisuke Kurita ◽  
Nobuo Suzui ◽  
Yong-Gen Yin ◽  
...  
Keyword(s):  
High Resolution ◽  
High Energy ◽  
Low Energy ◽  
Gamma Photon ◽  
X Ray ◽  
High Energy Gamma ◽  
Energy Gamma

scholarly journals MetroMMC: Electron-Capture Spectrometry with Cryogenic Calorimeters for Science and Technology

2019 ◽  
Vol 199 (1-2) ◽  
pp. 441-450 ◽  
Author(s):  
P. C.-O. Ranitzsch ◽  
D. Arnold ◽  
J. Beyer ◽  
L. Bockhorn ◽  
J. J. Bonaparte ◽  
...  
Keyword(s):  
Electron Capture ◽  
Science And Technology ◽  
High Energy ◽  
Low Energy ◽  
Energy Threshold ◽  
High Energy Resolution ◽  
Wide Energy Range ◽  
Good Resolution ◽  
X Ray ◽  
Wide Range

AbstractAccurate decay data of radionuclides are necessary for many fields of science and technology, ranging from medicine and particle physics to metrology. However, data that are in use today are mostly based on measurements or theoretical calculation methods that are rather old. Recent measurements with cryogenic detectors and other methods show significant discrepancies to both older experimental data and theory in some cases. Moreover, the old results often suffer from large or underestimated uncertainties. This is in particular the case for electron-capture (EC) decays, where only a few selected radionuclides have ever been measured. To systematically address these shortcomings, the European metrology project MetroMMC aims at investigating six radionuclides decaying by EC. The nuclides are chosen to cover a wide range of atomic numbers Z, which results in a wide range of decay energies and includes different decay modes, such as pure EC or EC accompanied by $$\gamma $$γ- and/or $$\beta ^{+}$$β+-transitions. These will be measured using metallic magnetic calorimeters (MMCs), cryogenic energy-dispersive detectors with high-energy resolution, low-energy threshold and high, adjustable stopping power that are well suited for measurements of the total decay energy and X-ray spectrometry. Within the MetroMMC project, these detectors are used to obtain X-ray emission intensities of external sources as well as fractional EC probabilities of sources embedded in a $$4\pi $$4π absorber. Experimentally determined nuclear and atomic data will be compared to state-of-the-art theoretical calculations which will be further developed within the project. This contribution introduces the MetroMMC project and in particular its experimental approach. The challenges in EC spectrometry are to adapt the detectors and the source preparation to the different decay channels and the wide energy range involved, while keeping the good resolution and especially the low-energy threshold to measure the EC from outer shells.

High resolution, low energy avalanche photodiode X-ray detectors

1991 ◽  
Vol 38 (2) ◽  
pp. 144-147 ◽  
Author(s):  
R. Farrell ◽  
K. Vanderpuye ◽  
G. Entine ◽  
M.R. Squillante
Keyword(s):  
High Resolution ◽  
Avalanche Photodiode ◽  
Low Energy ◽  
X Ray
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