Timothy GonzalezLuis R. GonzálezJ. Trylski2026-03-222026-03-22197410.1007/978-3-322-94774-1_68https://doi.org/10.1007/978-3-322-94774-1_68https://andeanlibrary.org/handle/123456789/83507An approximate formula for the line shape for the compensation-induced parity-forbidden 1s–2s optical absorption of shallow hydrogen-like impurities in semiconductors is given in the limit of small compensations. The unusual “camel-back” structure of the absorption peak is predicted.enImpuritySemiconductorParity (physics)ExcitationCompensation (psychology)Atomic physicsSpectral lineAbsorption spectroscopyAbsorption (acoustics)Materials sciencebook-chapter