Fig. 1. Absorption spectra of β-carotene at different temperatures

Fig. 2. The Raman spectra of β-carotene at different temperatures

Fig. 3. The Huang-Rhys at different temperatures

Fig. 4. The Raman of C—C and C=C at different temperature

Fig. 5. Dependence on temperature of the electron phonon coupling

Fig. 6. Dependence on temperature of the Raman scattering cross-section

Fig. 7. The influence of resonance effect on RSCS

Fig. 8. Dependence on temperature of the FWHM

Fig. 9. The temperature dependence of the ratios of I_2ν1 to I_ν1