Strong-field atomic physics meets $^{229}$Th nuclear physics

2021 ◽  
Author(s):  
Wu Wang ◽  
Hanxu Zhang ◽  
Xu Wang
Keyword(s):  
Excited State ◽  
Simple Model ◽  
Atomic Physics ◽  
Ground State ◽  
Nuclear Physics ◽  
Strong Field ◽  
Nuclear Excitation ◽  
The Core ◽  
Research Areas ◽  
Nuclear Ground State

Abstract We show how two apparently unrelated research areas, namely, strong-field atomic physics and $^{229}$Th nuclear physics, are connected. The connection is possible due to the existence of a very low-lying excited state of the $^{229}$Th nucleus, which is only about 8 eV above the nuclear ground state. The connection is physically achieved through an electron recollision process, which is the core process of strong-field atomic physics. The laser-driven recolliding electron is able to excite the nucleus, and a simple model is presented to explain this recollision-induced nuclear excitation (RINE) process. The connection of these two research areas provides novel opportunities for each area and intriguing possibilities from the direct three-partite interplay between atomic physics, nuclear physics, and laser physics.

scholarly journals APAPES - Atomic Physics with Accelerators: Projectile Electron Spectroscopy

2019 ◽  
Vol 21 ◽  
pp. 153
Author(s):  
I. Madesis ◽  
A. Lagoyannis ◽  
M. Axiotis ◽  
T. J. Mertzimekis ◽  
M. Andrianis ◽  
...  
Keyword(s):  
Atomic Physics ◽  
Nuclear Physics ◽  
Strong Field ◽  
Ion Beam ◽  
Strong Support ◽  
Heavy Ion ◽  
Collision Dynamics ◽  
Atomic Collisions ◽  
Zero Degree ◽  
Gas Targets

The only existing heavy-ion accelerator in Greece, the 5.5 MV TANDEM at the National Research Center “Demokritos” in Athens has been used to date primarily for investigations centering around nuclear physics. Here, we propose to establish the new (for Greece) discipline of Atomic Physics with Accelerators, a strong field in the EU with important contributions to fusion, hot plasmas, astrophysics, accelerator technology and basic atomic physics of ion-atom collision dynamics, structure and technology. This will be accomplished by combining the existing interdisciplinary atomic collisions expertise from three Greek universities, the strong support of distinguished foreign researchers and the high technical ion-beam know-how of the TANDEM group into a cohesive initiative.Using the technique of Zero-degree Auger Projectile Spectroscopy (ZAPS), we shall complete a much needed systematic isoelectronic investigation of K-Auger spectra emitted from collisions of pre-excited ions with gas targets using novel techniques. Our results are expected to lead to a deeper understanding of the neglected importance of cascade feeding of metastable states [1] in collisions of ions with gas targets and further elucidate their role in the non-statistical production of excited three-electron states by electron capture, recently a field of conflicting interpretations awaiting further resolution.

Luminescence studies of copper(I)-containing [2]pseudorotaxanes

2011 ◽  
Vol 89 (2) ◽  
pp. 98-103 ◽  
Author(s):  
Breeze N. Briggs ◽  
Fabien Durola ◽  
David R. McMillin ◽  
Jean-Pierre Sauvage
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Ground State ◽  
Room Temperature ◽  
Molecular Machines ◽  
Quantum Yields ◽  
Stacking Interactions ◽  
Fluid Solution ◽  
The Core ◽  
Photoluminescence Studies

This report describes photoluminescence studies of copper-containing [2]pseudorotaxanes that mimic elements of functioning molecular machines. Excitation with visible light induces a formal oxidation of the metal center and simulates an actuation process. In all four [2]pseudorotaxanes studied, the ring ligand is the same, but the thread ligand is variable, namely 2,9-di(anisol-4-yl)-1,10-phenanthroline (dap), 6,6′-di(anisol-4-yl)-2,2′-bipyridine (o-dabipy), 5,5′-di(anisol-4-yl)-2,2′-bipyridine (m-dabipy), or 8,8′-di(anisol-4-yl)-3,3′-bi-isoquinoline (dabiiq). The absorbance bandshapes suggest that aryl substituents extending from the core ligands engage in stacking interactions and induce a partially flattened structure in the ground state. More severe flattening occurs in the excited state and precludes the observation of emission if inter-ligand steric forces do not limit the distortion. Thus, the [2]pseudorotaxanes containing dap or o-dabipy as the thread ligand exhibit uncorrected emission maxima at around 720 nm in room-temperature dichloromethane, while the less constrained analogues, containing dabiiq or m-dabipy, are not emissive in fluid solution and barely exhibit a signal in rigid media. In dichloromethane, the luminescence quantum yields of the dap- and o-dabipy-containing systems are 6 × 10−4 and 4 × 10−4, and the excited-state lifetimes are 98 ns and 90 ns, respectively.

Pocket formula for nuclear deformations of actinides

2018 ◽  
Vol 33 (17) ◽  
pp. 1850096
Author(s):  
H. C. Manjunatha ◽  
K. N. Sridhar
Keyword(s):  
Ground State ◽  
Nuclear Physics ◽  
Nuclear Deformation ◽  
Nuclear Ground State ◽  
Nuclear Deformations

We have formulated a pocket formula for quadrupole [Formula: see text], octupole [Formula: see text], hexadecapole [Formula: see text] and hexacontatetrapole [Formula: see text] deformation of the nuclear ground state of all isotopes of actinide nuclei (89 [Formula: see text] Z [Formula: see text] 103). This formula is first of its kind and produces a nuclear deformation of all isotopes actinide nuclei 89 [Formula: see text] Z [Formula: see text] 103 with simple inputs of Z and A. Hence, this formula is useful in the fields of nuclear physics to study the structure and interaction of nuclei.

scholarly journals Electric Quadrupole Excitation of the First Excited State of 11B

1980 ◽  
Vol 33 (3) ◽  
pp. 505 ◽  
Author(s):  
MP Fewell ◽  
RH Spear ◽  
TH Zabel ◽  
AM Baxter
Keyword(s):  
Excited State ◽  
Ground State ◽  
Coulomb Excitation ◽  
Transition Probability ◽  
Electric Quadrupole ◽  
Core Excitation ◽  
The Core ◽  
Model Predictions ◽  
First Excited State ◽  
Excitation Model

The Coulomb excitation of backscattered llB projectiles has been used to measure the reduced E2 transition probability B(E2; 3/2--+ 1/2-) between the 3/2- ground state and the 1/2- first excited state of llB. It is found that B(E2;3/2--+1/2-) = 2�1�0�4 e2 fm4, which agrees with shell model predictions but is a factor of 10 larger than the prediction of the core-excitation model.

Renilla Bioluminescence: A Morphologic Approach to the Location of Photocytes

1974 ◽  
Vol 32 ◽  
pp. 208-209
Author(s):  
Ben O. Spurlock ◽  
Milton J. Cormier
Keyword(s):  
Excited State ◽  
Ground State ◽  
Molecular Basis ◽  
Light Emission ◽  
Chemical Basis ◽  
Electronic Excited State ◽  
Colonial Form ◽  
The Common ◽  
Eighteenth And Nineteenth Centuries ◽  
Catalyzed Oxidation

The phenomenon of bioluminescence has fascinated layman and scientist alike for many centuries. During the eighteenth and nineteenth centuries a number of observations were reported on the physiology of bioluminescence in Renilla, the common sea pansy. More recently biochemists have directed their attention to the molecular basis of luminosity in this colonial form. These studies have centered primarily on defining the chemical basis for bioluminescence and its control. It is now established that bioluminescence in Renilla arises due to the luciferase-catalyzed oxidation of luciferin. This results in the creation of a product (oxyluciferin) in an electronic excited state. The transition of oxyluciferin from its excited state to the ground state leads to light emission.

Ground State and Excited State H-Atom Temperatures in a Microwave Plasma Diamond Deposition Reactor

1996 ◽  
Vol 6 (9) ◽  
pp. 1167-1180 ◽  
Author(s):  
A. Gicquel ◽  
M. Chenevier ◽  
Y. Breton ◽  
M. Petiau ◽  
J. P. Booth ◽  
...  
Keyword(s):  
Excited State ◽  
Ground State ◽  
Microwave Plasma ◽  
Diamond Deposition
Sign in / Sign up

Export Citation Format

Share Document