Under the hydrostatic pressure up to 12 kbar at 77K

the photolumines-cence spectra of the Cr

2+

impurity are observed in n-GaAs samples. It is the internal transition from the excited state

5

E to the ground state

5

T

2

of the Cr

2+

icn. In GaAs: Cr

2+

there is a strong Jahn-Teller effect which gives an important influence on the emission spectra.We calculate the emission spectrum on considering the static Jahn-Teller effect and compare the theoretical spectrum with the experimental results. The Jahn-Teller energies of the

5

E and

5

T

2

states are estimated.