scholarly journals Signatures of shape transitions in odd-Aneutron-rich rubidium isotopes

2010 ◽  
Vol 82 (6) ◽  
Author(s):  
R. Rodriguez-Guzman ◽  
P. Sarriguren ◽  
L. M. Robledo
Keyword(s):  
Rubidium Isotopes ◽  
Shape Transitions

Flame stabilization mechanisms and shape transitions in a 3D printed, hydrogen enriched, methane/air low-swirl burner

2021 ◽  
Author(s):  
Qiang An ◽  
Sina Kheirkhah ◽  
Jeffrey Bergthorson ◽  
Sean Yun ◽  
Jeongjae Hwang ◽  
...  
Keyword(s):  
Flame Stabilization ◽  
Swirl Burner ◽  
3D Printed ◽  
Shape Transitions

scholarly journals Effects of Temperature on Chaotropic Anion-Induced Shape Transitions of Star Molecular Bottlebrushes with Heterografted Poly(ethylene oxide) and Poly(N,N-dialkylaminoethyl methacrylate) Side Chains in Acidic Water

Soft Matter ◽  
2021 ◽  
Author(s):  
Evan M. Lewoczko ◽  
Michael T. Kelly ◽  
Ethan Kent ◽  
Bin Zhao
Keyword(s):  
Ethylene Oxide ◽  
Side Chains ◽  
Acidic Water ◽  
Poly Ethylene Oxide ◽  
Effects Of Temperature ◽  
Poly Ethylene ◽  
Shape Transitions

This article reports a study of the effects of temperature on chaotropic anion (CA)-induced star-globule shape transitions in acidic water of three-arm star bottlebrushes composed of heterografted poly(ethylene oxide) (PEO)...

scholarly journals Experimental Study of Transient Mechanisms of Bi-Stable Flame Shape Transitions in a Swirl Combustor

2017 ◽  
Author(s):  
Michael Stöhr ◽  
Kilian Oberleithner ◽  
Moritz Sieber ◽  
Zhiyao Yin ◽  
Wolfgang Meier
Keyword(s):  
Gas Turbines ◽  
High Speed ◽  
Hydrodynamic Instability ◽  
Mean Flow ◽  
Swirl Combustor ◽  
Time Resolved ◽  
Precessing Vortex Core ◽  
Amplification Process ◽  
Flame Shape ◽  
Shape Transitions

Sudden changes of flame shape are an undesired, yet poorly understood feature of swirl combustors used in gas turbines. The present work studies flame shape transition mechanisms of a bistable turbulent swirl flame in a gas turbine model combustor, which alternates intermittently between an attached V-form and a lifted M-form. Time-resolved velocity fields and 2D flame structures were measured simultaneously using high-speed stereo-PIV and OH-PLIF at 10 kHz. The data analysis is performed using two novel methods that are well adapted to the study of transient flame shape transitions: Firstly, the linear stability analysis (LSA) of a time-varying mean flow and secondly the recently proposed spectral proper orthogonal decomposition (SPOD). The results show that the transitions are governed by two types of instability, namely a hydrodynamic instability in the form of a precessing vortex core (PVC) and a thermoacoustic (TA) instability. The LSA shows that the V-M transition implies the transient formation of a PVC as the result of a self-amplification process. The V-M transition, on the other hand, is induced by the appearance of a TA instability that suppresses the PVC and thereby modifies the flow field such that the flame re-attaches at the nozzle. In summary these results provide novel insights into the complex interactions of TA and hydrodynamic instabilities that govern the shape of turbulent swirl-stabilized flames.

THE IDENTIFICATION AND HALF LIVES OF FISSION-PRODUCT Rb92 AND Rb93

1960 ◽  
Vol 38 (12) ◽  
pp. 1614-1622 ◽  
Author(s):  
K. Fritze ◽  
T. J. Kennett
Keyword(s):  
Fission Product ◽  
Decay Rate ◽  
Half Life ◽  
Fission Products ◽  
Strontium Isotopes ◽  
A Value ◽  
Γ Ray ◽  
Rubidium Isotopes

The existence of two new rubidium isotopes, Rb92 and Rb93, has been established and their half lives measured. The half lives of these short-lived fission products were determined using a technique of timed precipitations. The values obtained for Rb92 and Rb93 were 5.3 ± 0.5 sec and 5.6 ± 0.5 sec respectively. The half lives of the strontium and yttrium daughters were also determined. The strontium isotopes were studied by observing the decay rate of a characteristic γ-ray peak. For Sr92, the decay of the 1.37-Mev line gave a value of 2.71 ± 0.02 hr. A γ-ray peak at 590 kev, which was found to be associated with Sr93, decayed with a half life of 7.54 ± 0.06 min. The half lives of the yttrium daughters were determined by β counting. The values found for Y92 and Y93 were 3.53 ± 0.02 hr and 10.1 ± 0.1 hr respectively.

scholarly journals Microscopic description of spherical toγ-soft shape transitions in Ba and Xe nuclei

2010 ◽  
Vol 81 (3) ◽  
Author(s):  
Z. P. Li ◽  
T. Nikšić ◽  
D. Vretenar ◽  
J. Meng
Keyword(s):  
Microscopic Description ◽  
Shape Transitions

JACOBI SHAPE TRANSITIONS WITHIN THE LSD MODEL AND THE SKYRME-ETF APPROACH

2008 ◽  
Vol 17 (01) ◽  
pp. 100-109 ◽  
Author(s):  
JOHANN BARTEL ◽  
KRZYSZTOF POMORSKI
Keyword(s):  
Present Approach ◽  
Thomas Fermi ◽  
The Stability ◽  
Shape Transitions ◽  
Rotating Nuclei

The "Modified Funny-Hills parametrisation" is used together with the Lublin-Strasbourg Drop Model to evaluate the stability of rotating nuclei. The Jacobi transition into triaxial shapes is studied. By a comparison with selfconsistent semiclassical calculations in the framework of the Extended Thomas-Fermi method, the validity of the present approach is demonstrated and possible improvements are indicated.

scholarly journals Dynamic and elastic shape transitions in curved ESCRT-III filaments

2017 ◽  
Vol 47 ◽  
pp. 126-135 ◽  
Author(s):  
Nicolas Chiaruttini ◽  
Aurélien Roux
Keyword(s):  
Shape Transitions

Plots for rubidium isotopes

2006 ◽  
pp. 45-46
Author(s):  
T. S. Belanova ◽  
A. V. Ignatyuk ◽  
A. B. Pashchenko ◽  
V. I. Plyaskin
Keyword(s):  
Rubidium Isotopes
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