The R-branch of the 1Πu ← 1Σg+ transition of H2 shows a band head at the very low value of J = 1. The rotational constant of the ground state is 60.80 cm− 1. What is the rotational constant of the upper state? Has the bond length increased or decreased in the transition?
Electronic Transitions and Spectroscopy
The term “electronic” connotes electron, and the term “transition” implies transformation. In a molecule, the electrons move from a lower to a higher energy state due to excitation. The two energy states, the ground state and the excited state are the lowest and the highest energy states, respectively. An energy change is observed with this transition, which depicts the various data related to the molecule.
Photoelectron Spectroscopy
Photoelectron spectroscopy (PES) is a part of experimental chemistry. It is a technique used in laboratories that involves projecting intense beams of radiation on a sample element. In response, the element ejects electrons for which the relative energies are measured.
The R-branch of the 1Πu ← 1Σg+ transition of H2 shows a band head at the very low value of J = 1. The rotational constant of the ground state is 60.80 cm− 1. What is the rotational constant of the upper state? Has the bond length increased or decreased in the transition?
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