Addendum Emission spectrum of V3+ -αAl2O3

(1)

HAL Id: jpa-00208758

https://hal.archives-ouvertes.fr/jpa-00208758

Submitted on 1 Jan 1978

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Addendum Emission spectrum of V3+ -αAl2O3

Bernard Champagnon, E. Duval

To cite this version:

Bernard Champagnon, E. Duval. Addendum Emission spectrum of V3+ -αAl2O3. Journal de Physique, 1978, 39 (2), pp.234-234. �10.1051/jphys:01978003902023400�. �jpa-00208758�

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ADDENDUM

EMISSION SPECTRUM OF

V3+ -03B1Al2O3

J.

Physique

^Lett.³⁸(1977) ^L-299

B. CHAMPAGNON and E. DUVAL Laboratoire de

Spectroscopie

^et^deLuminescence Université Claude-Bernard,

Lyon

I, ⁶⁹⁶²¹Villeurbanne, ^France

The letter Emission spectrum

of V 3 +_aA1203,

J.

Physique

^Lett.³⁸(1977) L-299 does not mention ^a

Foguel

entitled Fluorescence spectrum

of

^trivalent

nunadium in corundum, Phys. ^Lett.¹⁹(1965) ^17.

Both articles report ^the^samespectrum ^{but the}^new measurements ^carried^outⁱⁿ^our^work

give

^more

detailed information ^on^thisemission. Behaviour of the lines under stress and the absence of a measurable Jahn Teller distortion in the

emitting

level and in the fundamental

1 AI

level allow us to attribute this emission to the

lE(t2)

^level

coming

^{from the}

lE(t2)

level of cubic symmetry.

(The

^other

possibility

^was

that the

emitting

^level^comes^{from the}

IT 2(t2)

^level

of cubic

symmetry.)

^{The time}^constantof the emission

(r ⁼^2.5^x^{10 - 6}^{s for T}^Â

point of He) is very

^short

compared

^to^{that of}

ruby.

This is accounted for

by

^a

non-radiative

decay through

^the^3E^state

originating

from the fundamental

3T1(t2)

level of cubic symmetry.

This

explains

^the^weak

intensity

observed and

why

^the

construction of the 1.2 mm

(8

^{cm -}

1)

^maser^considered

by

Golschmidt could not be carried out.

We are indebted to Dr B.

Clerjaud

for the reference mentioned above.

Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphys:01978003902023400

Addendum Emission spectrum of V3+ -αAl2O3

HAL Id: jpa-00208758

https://hal.archives-ouvertes.fr/jpa-00208758

Addendum Emission spectrum of V3+ -αAl2O3

Bernard Champagnon, E. Duval

To cite this version:

ADDENDUM

V3+ -03B1Al2O3

Physique

Spectroscopie

Lyon

of V 3 +_aA1203,

Physique

previous

Foguel

of

give

emitting

1 AI

lE(t2)

coming

lE(t2)

(The

possibility

emitting

IT 2(t2)

symmetry.)

point of He) is very

compared

ruby.

by

decay through

originating

3T1(t2)

explains

intensity

why

(8

1)

by

Clerjaud