Effect of uniaxial pressure of forbidden transitions in the EPR spectrum of Mn2+ in MgO

1970 ◽  
Vol 13 (6) ◽  
pp. 701-703
Author(s):  
N. G. Kakazei ◽  
L. A. Sorin
Keyword(s):  
Uniaxial Pressure ◽  
Epr Spectrum ◽  
Forbidden Transitions

Recent Radiative and Collisional Atomic Data of Astrophysical Interest

1988 ◽  
Vol 102 ◽  
pp. 129-132
Author(s):  
K.L. Baluja ◽  
K. Butler ◽  
J. Le Bourlot ◽  
C.J. Zeippen
Keyword(s):  
Mass Production ◽  
Bound States ◽  
Physical Models ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Atomic Data ◽  
Isoelectronic Sequence ◽  
Astrophysical Interest ◽  
Radiative Transitions ◽  
Forbidden Transitions

SummaryUsing sophisticated computer programs and elaborate physical models, accurate radiative and collisional atomic data of astrophysical interest have been or are being calculated. The cases treated include radiative transitions between bound states in the 2p4and 2s2p5configurations of many ions in the oxygen isoelectronic sequence, the photoionisation of the ground state of neutral iron, the electron impact excitation of the fine-structure forbidden transitions within the 3p3ground configuration of CℓIII, Ar IV and K V, and the mass-production of radiative data for ions in the oxygen and fluorine isoelectronic sequences, as part of the international Opacity Project.

MEASUREMENT OF ELECTRIC FIELD IN TURBULENT PLASMA BY THE METHOD OF SATELLITES OF FORBIDDEN TRANSITIONS IN HELIUM

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-867-C7-868
Author(s):  
M. P. Brizhinev ◽  
S. V. Egorov ◽  
B. G. Eremin ◽  
A. V. Kostrov ◽  
A. D. Stepanushkin
Keyword(s):  
Electric Field ◽  
Turbulent Plasma ◽  
Forbidden Transitions

A Rare Low Spin Co(IV) Bis-Silyldiamide with High Thermal Stability: Exploring the Origin of an Unusual S = 1/2 Configuration

2020 ◽  
Author(s):  
David Zanders ◽  
Goran Bačić ◽  
Dominique Leckie ◽  
Oluwadamilola Odegbesan ◽  
Jeremy M. Rawson ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Density Functional ◽  
Atomic Layer ◽  
Epr Spectrum ◽  
Functional Theory ◽  
Cluster Calculations ◽  
Layer Deposition ◽  
Starting Point ◽  
Higher Spin ◽  
Surface Saturation

Attempted preparation of a chelated Co(II) β-silylamide re-sulted in the unprecedented disproportionation to Co(0) and a spirocyclic cobalt(IV) bis(β-silyldiamide): [Co[(NtBu)2SiMe2]2] (1). Compound 1 exhibits a room temperature magnetic moment of 1.8 B.M and a solid state axial EPR spectrum diagnostic of a rare S = 1/2 configuration. Semicanonical coupled-cluster calculations (DLPNO-CCSD(T)) revealed the doublet state was clearly preferred (–27 kcal/mol) over higher spin configurations for which density functional theory (DFT) showed no energetic preference. Unlike other Co(IV) complexes, 1 had remarkable thermal stability, and was demonstrated to form a stable self-limiting monolayer in initial atomic layer deposition (ALD) surface saturation tests. The ease of synthesis and high-stability make 1 an attractive starting point to begin investigating otherwise inaccessible Co(IV) intermediates and synthesizing new materials.

Radiation Effects on Hollandite Ceramics developed for Radioactive Cesium Immobilization

2003 ◽  
Vol 792 ◽  
Author(s):  
V. Aubin ◽  
D. Caurant ◽  
D. Gourier ◽  
N. Baffier ◽  
S. Esnouf ◽  
...  
Keyword(s):  
Radiation Effects ◽  
Liquid Waste ◽  
Fission Products ◽  
Radioactive Cesium ◽  
Radioactive Liquid Waste ◽  
Epr Spectrum ◽  
Paramagnetic Resonance ◽  
Γ Radiation ◽  
The Stability ◽  
High Level

ABSTRACTProgress on separating the long-lived fission products from the high level radioactive liquid waste (HLW) has led to the development of specific host matrices, notably for the immobilization of cesium. Hollandite (nominally BaAl2Ti6O16), one of the main phases constituting Synroc, receives renewed interest as specific Cs-host wasteform. The radioactive cesium isotopes consist of short-lived Cs and Cs of high activities and Cs with long lifetime, all decaying according to Cs+→Ba2++e- (β) + γ. Therefore, Cs-host forms must be both heat and (β,γ)-radiation resistant. The purpose of this study is to estimate the stability of single phase hollandite under external β and γ radiation, simulating the decay of Cs. A hollandite ceramic of simple composition (Ba1.16Al2.32Ti5.68O16) was essentially irradiated by 1 and 2.5 MeV electrons with different fluences to simulate the β particles emitted by cesium. The generation of point defects was then followed by Electron Paramagnetic Resonance (EPR). All these electron irradiations generated defects of the same nature (oxygen centers and Ti3+ ions) but in different proportions varying with electron energy and fluence. The annealing of irradiated samples lead to the disappearance of the latter defects but gave rise to two other types of defects (aggregates of light elements and titanyl ions). It is necessary to heat at relatively high temperature (T=800°C) to recover an EPR spectrum similar to that of the pristine material. The stability of hollandite phase under radioactive cesium irradiation during the waste storage is discussed.

Interconfiguration Forbidden Transitions in Argon Isoelectronic Ions

1998 ◽  
Vol 508 (2) ◽  
pp. 959-961 ◽  
Author(s):  
A. K. Das ◽  
T. K. Ghosh ◽  
D. Ray ◽  
T. K. Mukherjee ◽  
P. K. Mukherjee
Keyword(s):  
Forbidden Transitions

Characterization of Colloidal Amorphous Arrays Prepared by Uniaxial Pressure Application

Langmuir ◽  
2019 ◽  
Vol 35 (43) ◽  
pp. 13983-13990 ◽  
Author(s):  
Yui Naoi ◽  
Takahiro Seki ◽  
Ryosuke Ohnuki ◽  
Shinya Yoshioka ◽  
Yukikazu Takeoka
Keyword(s):  
Uniaxial Pressure ◽  
Pressure Application

scholarly journals The novel “g' = 1.74” EPR spectrum of pink and purple uteroferrin.

1980 ◽  
Vol 255 (23) ◽  
pp. 11204-11209 ◽  
Author(s):  
B.C. Antanaitis ◽  
P. Aisen ◽  
H.R. Lilienthal ◽  
R.M. Roberts ◽  
F.W. Bazer
Keyword(s):  
The Novel ◽  
Epr Spectrum
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