scholarly journals Gaussian Energy Broadening Function of an HPGe Detector in the Range of 40 keV to 1.46 MeV

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
E. Eftekhari Zadeh ◽  
S. A. H. Feghhi ◽  
E. Bayat ◽  
G. H. Roshani
Keyword(s):  
Response Function ◽  
System Model ◽  
Nuclear Spectroscopy ◽  
Energy Response ◽  
Resolution Function ◽  
New Approach ◽  
High Purity Germanium ◽  
Hpge Detectors ◽  
Detector Structure ◽  
Coaxial Detector

High-purity germanium (HPGe) detectors are widely used in nuclear spectroscopy (e.g., neutron activation analysis) due to their high resolution. Resolution function of a GMX series coaxial detector system (model number GMX40P4-83) in the range of 40 keV to 1.46 MeV has been measured using standard γ-ray sources. The energy response function also was calculated using Monte Carlo simulation through the precise modeling of the detector structure. The simulated energy response function was verified with the measured energy response function obtained using calibration sources. A new approach was used and the agreement between both results has been improved.

Spectroscopic study of β-delayed particle emission from proton-rich nucleus 23Si

2018 ◽  
Vol 27 (02) ◽  
pp. 1850014 ◽  
Author(s):  
K. Wang ◽  
D. Q. Fang ◽  
Y. T. Wang ◽  
X. X. Xu ◽  
L. J. Sun ◽  
...  
Keyword(s):  
Charged Particle ◽  
High Purity ◽  
Detection System ◽  
Exotic Nucleus ◽  
Particle Emission ◽  
Particle Spectrum ◽  
Proton Emission ◽  
High Purity Germanium ◽  
Hpge Detectors ◽  
New Formula

The [Formula: see text]-delayed particle emission from the exotic nucleus [Formula: see text]Si has been studied using a detection system with silicon array and clover-type high-purity germanium (HPGe) detectors. The [Formula: see text]-delayed charged-particle spectrum and [Formula: see text]-ray spectrum were identified. The half-life of [Formula: see text]Si has been determined. A new [Formula: see text]-delayed proton branch with an energy of 3811[Formula: see text]keV was observed. The [Formula: see text]-delayed two-proton emission was confirmed.

scholarly journals New approach for calibration the efficiency of HpGe detectors

2014 ◽  
Author(s):  
I. A. Alnour ◽  
H. Wagiran ◽  
N. Ibrahim ◽  
S. Hamzah ◽  
W. B. Siong ◽  
...  
Keyword(s):  
New Approach ◽  
Hpge Detectors

Response Function of Collimated Detector for Non Axial Detector-Source Geometry

2013 ◽  
Vol 772 ◽  
pp. 571-578
Author(s):  
Rahadi Wirawan ◽  
M. Djamal ◽  
A. Waris ◽  
Gunawan Handayani ◽  
Hong Joo Kim
Keyword(s):  
Monte Carlo ◽  
Response Function ◽  
Gamma Ray ◽  
Geant4 Simulation ◽  
Fundamental Parameter ◽  
Response Functions ◽  
Energy Response ◽  
Simulation Code ◽  
Source Geometry ◽  
Detector Axis

Response function is a fundamental parameter for all detectors in order to analyze the energy distribution of gamma ray which undergoes scattering interaction with the material. The response functions of a 3 in. x 3 in. NaI(Tl) collimated detector for non axis detector-source geometry has been calculated using a Monte Carlo approach from GEANT4 simulation code with 0.662 MeV of mono-energetic of photon gamma ray. Collimated Pb with 4 cm thickness and 2 cm of holes diameter were employed for shielding. The source was assumed as an isotropic point source and it is placed at various positions to the detector axis. The comparison between the measured energy response functions and the simulated energy response functions after normalization were also performed in order to validate the modeling results.

A Multibody System Model for Meshing Gears

2010 ◽  
Vol 44-47 ◽  
pp. 1273-1278 ◽  
Author(s):  
Liu Lei
Keyword(s):  
Multibody Dynamics ◽  
Multibody System ◽  
Gear Wheel ◽  
Numerical Approach ◽  
Computational Effort ◽  
Rigid Bodies ◽  
The Body ◽  
System Model ◽  
New Approach ◽  
Elastic Elements

As a type of numerical approach to dynamics of gears, multibody dynamics method can handle realistic cases of contact modeling with acceptable accuracy and considerably less computational effort. The ability to simulate contact between teeth has become an essential topic in multibody dynamics. Fully rigid method is not suited for a high quality of the analysis to take into account some elasticity in the model of meshing gear wheels. In our new approach the circumferentially rotatable rigid teeth and elastic elements composed of rotational spring-damper combinations are hereby put forward. The teeth and the body of each gear wheel are still regarded as rigid bodies, but they are connected with each other by elastic elements. Besides, Lankarani & Nikravesh Contact Model is utilized, which counts energy dissipation by means of viscous damping. Both large motions with revolutions and important elasticity are considered in this teeth-wheel multibody system model. Two examples are provided in which the simulation results of completely rigid method, the approach in [10], our new approach and finite element methods are compared. Comparisons indicate that our newly developed approach is more suitable for modeling multibody geared systems.

scholarly journals New method for the production of thin and stable, segmented n$$+$$ contacts in HPGe detectors

2021 ◽  
Vol 57 (6) ◽  
Author(s):  
S. Bertoldo ◽  
G. Maggioni ◽  
W. Raniero ◽  
C. Carraro ◽  
S. Riccetto ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Pulsed Laser ◽  
Annealing Treatment ◽  
Leakage Currents ◽  
Detector Performance ◽  
Low Leakage ◽  
Gamma Ray Detectors ◽  
High Purity Germanium ◽  
Hpge Detectors ◽  
The Stability

AbstractThe realization of pulsed-laser diffused, thin n$$+$$ + contacts on high purity germanium (HPGe) and their successful segmentation is described. The contacts have been obtained by a laser-induced diffusion of Sb atoms, deposited by sputtering on Ge surface, and then segmented by means of a photolithographic technique. Three small prototypes of gamma ray detectors have been implemented, using the same n$$+$$ + contact (laser diffused Sb) but with three different geometries and a B implanted p$$+$$ + contact. Electrical and detection properties of the prototypes have been characterized, showing low leakage currents and good spectroscopy data with different gamma-ray sources. The stability of the detector performance has also been tested subjecting one of the prototypes to a typical annealing treatment.

35 Years of EDS Software

2009 ◽  
Vol 15 (6) ◽  
pp. 491-504 ◽  
Author(s):  
Frederick H. Schamber
Keyword(s):  
High Speed ◽  
Gamma Ray ◽  
Nuclear Spectroscopy ◽  
Future Directions ◽  
New Approach ◽  
X Ray ◽  
Modern Computer ◽  
Accuracy And Precision ◽  
Technology Foundation ◽  
Achievable Accuracy

AbstractThe computerized multichannel analyzer running software specifically designed for X-ray analysis appeared very early in the commercialization of the energy dispersive X-ray spectrometer (EDS) and, like the solid-state X-ray detector itself, was built on a technology foundation originally developed for nuclear spectroscopy. However, software techniques employed for gamma-ray spectra could not accommodate the continuum component of EDS spectra, and a new approach was required. Least-squares fitting with “top-hat” filtered spectra proved to be an effective solution that is still widely used today. Though modern computer technology has subsequently contributed greatly to the speed and convenience of present-day EDS software, it seems that the achievable accuracy and precision of spectrum analysis has not fundamentally improved, and most of the early challenges are still quite relevant, although they may appear in new guises. The availability of the high speed silicon drift detector, however, may provide both the incentive and the data precision to drive future advances. This article traces the formative years of EDS software from the personalized perspective of a participant. Factors that shaped the development of the industry are identified, and future directions are speculated.

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