scholarly journals Observation of quintuplet spectrum including twice the ground-state Rabi frequency in F = 3/2 metastable state of 3He atoms

2019 ◽  
Vol 27 (15) ◽  
pp. 20694 ◽  
Author(s):  
Yuanzhi Zhan ◽  
Xiang Peng ◽  
Sheng Li ◽  
Liang Zhang ◽  
Jingbiao Chen ◽  
...  
Keyword(s):  
Metastable State ◽  
Ground State ◽  
Rabi Frequency

Absorption Cross Sections of O2(a1Δg) and O2(X3Σg−) in the Region from 1087 to 1700 Å

1975 ◽  
Vol 53 (19) ◽  
pp. 1845-1852 ◽  
Author(s):  
S. Ogawa ◽  
M. Ogawa
Keyword(s):  
Metastable State ◽  
Cross Sections ◽  
Ground State ◽  
Experimental Error ◽  
Wavelength Region ◽  
Absorption Cross ◽  
Band Structures ◽  
The Cross

An attempt has been made to measure the absorption cross sections of O2 in the metastable state a1Δg from 1087 to 1700 Å. The absorption is measurable (σa ≥ 3 × 10−19 cm2) from around 1500 Å towards shorter wavelengths. Many band structures overlaying various continua have been seen. Absorption cross sections of O2 in the ground state X3Σg− also have been measured in the same wavelength region and our results agree with previously published values within experimental error. The cross sections of O2(a1Δg) are generally larger than those of O2(X3Σg−) below 1290 Å except at the wavelengths of a few strong bands of O2(X3Σg−).

Resonance fluorescence spectra from a three level atom interacting with a strong bichromatic field: induced two photon transitions

1983 ◽  
Vol 61 (1) ◽  
pp. 15-29 ◽  
Author(s):  
Douglas A. Hutchinson ◽  
Christine Downie ◽  
Constantine Mavroyannis
Keyword(s):  
Ground State ◽  
Rabi Frequency ◽  
Resonance Fluorescence ◽  
Excitation Spectra ◽  
Laser Fields ◽  
Two Photon ◽  
Photon Transition ◽  
Level Atom ◽  
Photon Excitation ◽  
The One

This investigation describes the interaction of a three level atom with two laser fields. One of the transitions from the ground state is in resonance with twice the frequency of the first laser and the other transition from the ground state is in resonance with the second laser. The Green's function formalism is used to derive expressions from which the induced two photon and one photon excitation spectra are computed. Also, approximate expressions are derived for the excitation spectra in the appropriate frequency regions. These results agree well with the numerical computations based upon the precise expressions. The interference between the two transitions produce some splittings; these splittings depend upon the Rabi frequency of the one photon transition. The intensities of the weak peaks depend upon the ratio of the Rabi frequency of the two photon transition to the frequency of the first laser. Some features of the excitation spectra are interpreted in terms of previous knowledge about the behavior of two level atoms in strong laser fields.

NUCLEAR ISOMERS Hg197m,g, Hg195m,g AND Au196m,g FORMED BY BOMBARDMENT OF GOLD WITH PROTONS OF ENERGIES FROM 8 TO 60 MEV

1963 ◽  
Vol 41 (10) ◽  
pp. 2634-2641 ◽  
Author(s):  
R. S. Tilbury ◽  
L. Yaffe
Keyword(s):  
Metastable State ◽  
Ground State ◽  
Excitation Functions ◽  
Nuclear Isomers ◽  
Bombarding Energy ◽  
Isomeric Pairs

Gold has been bombarded with protons of energies from 8 to 60 Mev to study excitation functions and isomer yield ratios for the formation of the isomeric pairs Hg197m,g, Hg195m,g, and Au196m,g. For Hg197m,g and Hg195m,g, the ratio of the yield of the metastable state to that of the ground state, σm/σg, was found to increase with increasing proton bombarding energy up to 20 and 35 Mev respectively, whilst that for Au196m,g showed a maximum at about 40 Mev.

The Magnetism of DNA Molecular Materials

2011 ◽  
Vol 306-307 ◽  
pp. 46-49
Author(s):  
Yong Juan Wang ◽  
Jie Cheng ◽  
Xian Fang Yue ◽  
De Sheng Liu
Keyword(s):  
Molecular Structure ◽  
Magnetic Property ◽  
Metastable State ◽  
Ground State ◽  
Magnetic Moments ◽  
Dna Bases ◽  
Molecular Materials ◽  
Planar Configuration

In this paper, the atomic magnetic moments and spin-splittings of the six-member ring N2C4 cluster with planar and folding configurations in DNA bases are studied, respectively. The results show that the surprising interplay between the molecular structure and their magnetic property. In the planar configuration, the cluster exhibits antiferromagnetism and ferromagnetism in the ground state and metastable state, respectively. In the folding configuration, it exhibits antiferromagnetism and ferrimagnetism in the ground state and metastable state, respectively.

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