Helle Kaasik

Zero-Phonon Lines: The Effect of a Strong Softening of Elastic Springs in the Excited State

V. Hizhnyakov, Helle Kaasik, I. Sildos · physica status solidi (b) · 2002 · 55 citations

Localized Excited State, Engineering, Crystal Growth Technology +20

Chemical Composition of Traditional and Analog Ayahuasca

Helle Kaasik, Rita C. Z. Souza, Flávia da Silva Zandonadi et al. · Journal of Psychoactive Drugs · 2020 · 53 citations

Ayahuasca Users in Estonia: Ceremonial Practices, Subjective Long-Term Effects, Mental Health, and Quality of Life

Helle Kaasik, Kairi Kreegipuu · Journal of Psychoactive Drugs · 2020 · 30 citations

Quality Of Life, Psychological Co-morbidities, Substance Use +16

Elemental and Base Anions Deposition in the Snow Cover of North-Eastern Estonia

Marko Kaasik, Rein Rõõm, Oddvar Røyset et al. · Water Air & Soil Pollution · 2000 · 20 citations

Strong Jahn–Teller effect in the excited state: Anomalous temperature dependence of the zero-phonon line

V. Hizhnyakov, V. Boltrushko, Helle Kaasik et al. · The Journal of Chemical Physics · 2003 · 19 citations

Charge Excitations, Engineering, Localized Excited State +21