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VOLUME 23 (1976) | ISSUE 6 | PAGE 377
Singularities of absorption spectra of directionally deformed naphthalene crystals
It is shown that directed compression of naphthalene crystals causes splitting of weakly polarized bands to be observed in the absorption spectrum. This can be attributed to a lowering of the crystal symmetry by the deformation. The exciton bands remain single in this case.