Typically, an initial laser pulse is fired to excite a molecule to a dissociative state, and then a second pulse is set at an absorption of one of the free fragmentation products, so its absorption is a measure of the abundance of the dissociation product.
The first experiments involving this technique utilized the compound iodocyanide, in which the iodine-carbon bond was observed. The ionization of sodium iodide has also been observed extensively. Typically, an initial laser pulse is fired to excite a molecule to a dissociative state, and then a second pulse is set at an absorption of one of the free fragmentation products, so its absorption is a measure of the abundance of the dissociation product. FTP, identify this branch of chemistry used to observe the dissociation of molecules on the order of 10-15 seconds, developed by Ahmed Zewail.
The first experiments involving this technique utilized the compound iodocyanide, in which the iodine-carbon bond was observed.
{femtosecond spectroscopy} or {femtochemistry}