Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance

Dmitry K. Efimov; Martins Bruvelis; Nikolai N. Bezuglov; Milan S. Dimitrijević; Andrey N. Klyucharev; Vladimir A. Srećković; Yurij N. Gnedin; Francesco Fuso

doi:10.3390/atoms5040050

Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance

Dmitry K. Efimov, Martins Bruvelis, Nikolai N. Bezuglov, Milan S. Dimitrijević, Andrey N. Klyucharev, Vladimir A. Srećković^*, Yurij N. Gnedin, Francesco Fuso

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The time-dependent population dynamics of hyperfine (HF) sublevels of n²p_3/2 atomic states upon laser excitation in a cold medium of alkali atoms is examined. We demonstrate some peculiarities of the absorption HF multiplet formation in D2-line resulting from a long interaction time (~200 μs) interaction between light and Na (n = 3) and Cs (n = 6) atoms in a cold and slow sub-thermal (T ~ 1K) beam. We analytically describe a number of D2-line-shape effects that are of interest in spectroscopic studies of cold dusty white dwarfs: broadening by optical pumping, intensity redistribution within components of D2-line HF multiplet for partially closed transitions and asymmetry of absorption lines induced by AC Stark shifts for cyclic transitions.

Original language	English (US)
Article number	50
Journal	Atoms
Volume	5
Issue number	4
DOIs	https://doi.org/10.3390/atoms5040050
State	Published - Dec 1 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 by the authors.

Keywords

Alkali atoms
Astrophysics
Spectroscopy

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics

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10.3390/atoms5040050

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title = "Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance",

abstract = "The time-dependent population dynamics of hyperfine (HF) sublevels of n2p3/2 atomic states upon laser excitation in a cold medium of alkali atoms is examined. We demonstrate some peculiarities of the absorption HF multiplet formation in D2-line resulting from a long interaction time (~200 μs) interaction between light and Na (n = 3) and Cs (n = 6) atoms in a cold and slow sub-thermal (T ~ 1K) beam. We analytically describe a number of D2-line-shape effects that are of interest in spectroscopic studies of cold dusty white dwarfs: broadening by optical pumping, intensity redistribution within components of D2-line HF multiplet for partially closed transitions and asymmetry of absorption lines induced by AC Stark shifts for cyclic transitions.",

keywords = "Alkali atoms, Astrophysics, Spectroscopy",

author = "Efimov, {Dmitry K.} and Martins Bruvelis and Bezuglov, {Nikolai N.} and Dimitrijevi{\'c}, {Milan S.} and Klyucharev, {Andrey N.} and Sre{\'c}kovi{\'c}, {Vladimir A.} and Gnedin, {Yurij N.} and Francesco Fuso",

note = "Publisher Copyright: {\textcopyright} 2017 by the authors.",

year = "2017",

month = dec,

day = "1",

doi = "10.3390/atoms5040050",

language = "English (US)",

volume = "5",

journal = "Atoms",

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TY - JOUR

T1 - Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance

AU - Efimov, Dmitry K.

AU - Bruvelis, Martins

AU - Bezuglov, Nikolai N.

AU - Dimitrijević, Milan S.

AU - Klyucharev, Andrey N.

AU - Srećković, Vladimir A.

AU - Gnedin, Yurij N.

AU - Fuso, Francesco

PY - 2017/12/1

Y1 - 2017/12/1

N2 - The time-dependent population dynamics of hyperfine (HF) sublevels of n2p3/2 atomic states upon laser excitation in a cold medium of alkali atoms is examined. We demonstrate some peculiarities of the absorption HF multiplet formation in D2-line resulting from a long interaction time (~200 μs) interaction between light and Na (n = 3) and Cs (n = 6) atoms in a cold and slow sub-thermal (T ~ 1K) beam. We analytically describe a number of D2-line-shape effects that are of interest in spectroscopic studies of cold dusty white dwarfs: broadening by optical pumping, intensity redistribution within components of D2-line HF multiplet for partially closed transitions and asymmetry of absorption lines induced by AC Stark shifts for cyclic transitions.

AB - The time-dependent population dynamics of hyperfine (HF) sublevels of n2p3/2 atomic states upon laser excitation in a cold medium of alkali atoms is examined. We demonstrate some peculiarities of the absorption HF multiplet formation in D2-line resulting from a long interaction time (~200 μs) interaction between light and Na (n = 3) and Cs (n = 6) atoms in a cold and slow sub-thermal (T ~ 1K) beam. We analytically describe a number of D2-line-shape effects that are of interest in spectroscopic studies of cold dusty white dwarfs: broadening by optical pumping, intensity redistribution within components of D2-line HF multiplet for partially closed transitions and asymmetry of absorption lines induced by AC Stark shifts for cyclic transitions.

KW - Alkali atoms

KW - Astrophysics

KW - Spectroscopy

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U2 - 10.3390/atoms5040050

DO - 10.3390/atoms5040050

M3 - Article

AN - SCOPUS:85045387808

SN - 2218-2004

VL - 5

JO - Atoms

JF - Atoms

IS - 4

M1 - 50

ER -

Nonlinear spectroscopy of alkali atoms in cold medium of astrophysical relevance

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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