Large-scale collisional energy transfer in laser-pumped metastable Ca atoms: Excitation of resonance states of Ca II

M. A. Khan; M. A. Gondal; M. H. Rais

doi:10.1007/BF01081540

Large-scale collisional energy transfer in laser-pumped metastable Ca atoms: Excitation of resonance states of Ca II

M. A. Khan^*, M. A. Gondal, M. H. Rais

^*Corresponding author for this work

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

4 Scopus citations

Abstract

We report the first experimental observation of the excitation of the 4 p²P_{3/2, 1/2} resonance states of Ca II (located at 74 720.4 and 74 497.5 cm^-1 above the ground state of Ca I) following pulsed-laser pumping of the 4 s²¹S_O-4 s4 p³P₁ intercombination transition of Ca I (E_ex = 15 210 cm^-1). Large scale collisional transfer of energy between the laser-excited atoms is believed to be responsible for this. This is possibly because sufficient time is available (τ_rad of the 4 s4 p³P₁ state is approximately 350 μs) for collisions to build such a high level of excitation. Some interesting additional features of the fluorescence spectra of the laser-pumped Ca vapor, such as temperature dependence of the fluorescence intensities and evolution in time of some selected states, are also presented.

Original language	English
Pages (from-to)	391-399
Number of pages	9
Journal	Applied Physics B: Lasers and Optics
Volume	61
Issue number	4
DOIs	https://doi.org/10.1007/BF01081540
State	Published - Oct 1995

Keywords

31.70.Hq
32.70. - n
34.50.Fa
52.25. - b

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)
General Physics and Astronomy

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10.1007/BF01081540

Cite this

@article{38d0c7bdeb3148d9a5adc3a3241540f5,

title = "Large-scale collisional energy transfer in laser-pumped metastable Ca atoms: Excitation of resonance states of Ca II",

abstract = "We report the first experimental observation of the excitation of the 4 p2P3/2, 1/2 resonance states of Ca II (located at 74 720.4 and 74 497.5 cm-1 above the ground state of Ca I) following pulsed-laser pumping of the 4 s21SO-4 s4 p3P1 intercombination transition of Ca I (Eex = 15 210 cm-1). Large scale collisional transfer of energy between the laser-excited atoms is believed to be responsible for this. This is possibly because sufficient time is available (τrad of the 4 s4 p3P1 state is approximately 350 μs) for collisions to build such a high level of excitation. Some interesting additional features of the fluorescence spectra of the laser-pumped Ca vapor, such as temperature dependence of the fluorescence intensities and evolution in time of some selected states, are also presented.",

keywords = "31.70.Hq, 32.70. - n, 34.50.Fa, 52.25. - b",

author = "Khan, {M. A.} and Gondal, {M. A.} and Rais, {M. H.}",

year = "1995",

month = oct,

doi = "10.1007/BF01081540",

language = "English",

volume = "61",

pages = "391--399",

journal = "Applied Physics B: Lasers and Optics",

issn = "0946-2171",

publisher = "Springer Verlag",

number = "4",

}

TY - JOUR

T1 - Large-scale collisional energy transfer in laser-pumped metastable Ca atoms

T2 - Excitation of resonance states of Ca II

AU - Khan, M. A.

AU - Gondal, M. A.

AU - Rais, M. H.

PY - 1995/10

Y1 - 1995/10

N2 - We report the first experimental observation of the excitation of the 4 p2P3/2, 1/2 resonance states of Ca II (located at 74 720.4 and 74 497.5 cm-1 above the ground state of Ca I) following pulsed-laser pumping of the 4 s21SO-4 s4 p3P1 intercombination transition of Ca I (Eex = 15 210 cm-1). Large scale collisional transfer of energy between the laser-excited atoms is believed to be responsible for this. This is possibly because sufficient time is available (τrad of the 4 s4 p3P1 state is approximately 350 μs) for collisions to build such a high level of excitation. Some interesting additional features of the fluorescence spectra of the laser-pumped Ca vapor, such as temperature dependence of the fluorescence intensities and evolution in time of some selected states, are also presented.

AB - We report the first experimental observation of the excitation of the 4 p2P3/2, 1/2 resonance states of Ca II (located at 74 720.4 and 74 497.5 cm-1 above the ground state of Ca I) following pulsed-laser pumping of the 4 s21SO-4 s4 p3P1 intercombination transition of Ca I (Eex = 15 210 cm-1). Large scale collisional transfer of energy between the laser-excited atoms is believed to be responsible for this. This is possibly because sufficient time is available (τrad of the 4 s4 p3P1 state is approximately 350 μs) for collisions to build such a high level of excitation. Some interesting additional features of the fluorescence spectra of the laser-pumped Ca vapor, such as temperature dependence of the fluorescence intensities and evolution in time of some selected states, are also presented.

KW - 31.70.Hq

KW - 32.70. - n

KW - 34.50.Fa

KW - 52.25. - b

UR - http://www.scopus.com/inward/record.url?scp=0029386812&partnerID=8YFLogxK

U2 - 10.1007/BF01081540

DO - 10.1007/BF01081540

M3 - Article

AN - SCOPUS:0029386812

SN - 0946-2171

VL - 61

SP - 391

EP - 399

JO - Applied Physics B: Lasers and Optics

JF - Applied Physics B: Lasers and Optics

IS - 4

ER -

Large-scale collisional energy transfer in laser-pumped metastable Ca atoms: Excitation of resonance states of Ca II

Abstract

Keywords

ASJC Scopus subject areas

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