TY - JOUR AU - B. Cho AU - C. Carlsson AU - Ralph Jimenez BT - The Journal of Chemical Physics DA - 2006-02 DO - 10.1063/1.2186318 N1 - JILA Pub. 7681 PY - 2006 EP - 144905 T2 - The Journal of Chemical Physics TI - Photon echo spectroscopy of porphyrins and heme proteins: effects of quasidegenerate electronic structure on the peak shift decay VL - 124 ER -