New Determination of theπ−Mass from Pionic-Atom Transition Energies

1976 ◽  
Vol 37 (21) ◽  
pp. 1380-1383 ◽  
Author(s):  
A. L. Carter ◽  
M. S. Dixit ◽  
M. K. Sundaresan ◽  
J. S. Wadden ◽  
P. J. S. Watson ◽  
...  
Keyword(s):  
Transition Energies ◽  
Pionic Atom

Theoretical Determination of the Ground State Geometry of 1.3.5-Triphenylbenzene

1984 ◽  
Vol 39 (12) ◽  
pp. 1250-1254 ◽  
Author(s):  
J. Ciosłowski
Keyword(s):  
Dihedral Angle ◽  
Ground State ◽  
Reasonable Agreement ◽  
Uv Spectrum ◽  
Theoretical Determination ◽  
Transition Energies ◽  
Benzene Rings ◽  
First Ionization Potential ◽  
Ground State Geometry

The geometry and electronic structure of 1.3.5-triphenylbenzene (TPB) has been determined by semiempirical quantum methods. Using the MNDO approach, the salient dependencies of the first ionization potential, the intramolecular distances and the bond angles on the dihedral angle between the planes of the TPB benzene rings were established. By an application of the CNDO/S method the UV spectrum of TPB was calculated. A comparison of the calculated transition energies with the values observed in the absorption spectrum yields 45° for the dihedral angle, which is in reasonable agreement with the available experimental data.

Evaluation of a method for the determination of accurate transition energies in the (n, γ) reaction

1983 ◽  
Vol 215 (1-2) ◽  
pp. 159-165 ◽  
Author(s):  
T.J. Kennett ◽  
W.V. Prestwich ◽  
R.J. Tervo ◽  
J.S. Tsai
Keyword(s):  
Transition Energies

scholarly journals Determination of the energy transitions and half-lives of Rubidium nuclei

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Ahmet Biçer ◽  
Kaan Manisa ◽  
Abdullah Engin Çalık ◽  
Mehmet Erdoğan ◽  
Mürsel Şen ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Germanium Detector ◽  
Nuclear Research ◽  
Photonuclear Reactions ◽  
Linear Accelerators ◽  
Efficient Tool ◽  
Transition Energies ◽  
High Purity Germanium ◽  
Physics Experiment

Abstract The photonuclear reactions, first extensively studied in the 1970’s and performed using the gamma rays obtained via bremsstrahlung, are a standard nuclear physics experiment. In this study, a non-enriched Rubidium sample was irradiated with photons produced by a clinical linear electron accelerator (cLINACs) with energies up to 18 MeV with the aim of activating it through photonuclear reactions. The activated sample was measured with a high purity germanium detector (HPGe) with the aim of measuring the transition energies and half-lives. The spectroscopic analysis performed on the obtained data yielded high quality results for the transition energies with precision matching or surpassing the literature data. For the half-lives the results were consistent with the literature, most notably the half-life of 84mRb decay was determined as 20.28(2) m. The results for both energies and half-lives further show that the clinical linear accelerators can be successfully used as an efficient tool in experimental nuclear research endeavors.

The precise determination of some γ-ray transition energies in 26Al, 27Al and 55Co

1987 ◽  
Vol 472 (3) ◽  
pp. 408-418 ◽  
Author(s):  
V.T. Koslowsky ◽  
R.E. Azuma ◽  
H.C. Evans ◽  
E. Hagberg ◽  
J.C. Hardy ◽  
...  
Keyword(s):  
Precise Determination ◽  
Transition Energies ◽  
Γ Ray

scholarly journals Theoretical modeling of optical spectra of N(1) and N(10) substituted lumichrome derivatives

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Denisa Cagardová ◽  
Jan Truksa ◽  
Martin Michalík ◽  
Jan Richtár ◽  
Jozef Krajčovič ◽  
...  
Keyword(s):  
Density Functional ◽  
Optical Transition ◽  
Photophysical Properties ◽  
Energy Levels ◽  
Dft Method ◽  
Functional Theory ◽  
Transition Energies ◽  
The Density Functional Theory ◽  
Td Dft

AbstractA systematic study of (7,8-dimethylated) alloxazine, isoalloxazine, and their derivatives with substituted N(1) and N(10) positions was conducted using the density functional theory. The main aim of this work was the direct investigation of substituent effect on the molecular structure. Furthermore, HOMED aromaticity indices were calculated to describe the scope of the geometry changes. Frontier molecular orbitals of reference alloxazine, isoalloxazine and lumichrome derivatives were discussed by means of changes in their shape and energy levels. Photophysical properties were analyzed by determination of optical transition energies using the TD-DFT method. Obtained results were compared with previously published experimental data.

Determination of Transition Mechanism and Polarity of a c-Plane ZnO Bulk by Using Contactless Electroreflectance Spectrum

2013 ◽  
Vol 538 ◽  
pp. 189-192 ◽  
Author(s):  
An Hai Tseng ◽  
Yei Fai Chiang ◽  
Dong Po Wang
Keyword(s):  
Electric Field ◽  
Room Temperature ◽  
Mercury Lamp ◽  
Transition Energies ◽  
Line Shapes ◽  
Transition Mechanism ◽  
Excitonic Transition ◽  
Polarization Electric Field ◽  
Type Of Transition

Contactless electroreflectance（CER）spectra of Zn and O-polarity faces of a c-plane ZnO bulk were measured at room temperature. Besides a depletion electric field existing in the sample, it is known that there is a polarization electric field due to nonzero spontaneous polarization. In this work, a mercury lamp was focused on the ZnO sample in the CER measurements to provide a photo-biased voltage to reduce strength of electric field of the sample. It was found that the spectrum with Hg lamp being on is more blue-shifted and its amplitude is smaller than that without Hg lamp. Thus the type of transition was attributed to excitonic transition. The shift of the excitonic transition-energies of the Zn- and O-faces were obtained by fitting experimental CER spectra by using Lorenzian line-shapes. In addition, the polarity of faces can be determined by the amount of shift with Hg lamp being on.

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