title: Supersonic Jet/Time-of-flight mass spectrometry of adenine using nanosecond and femtosecond lasers.
abstract: Mass spectra and ionization efficiencies of adenine were measured with nanosecond (15 ns) and femtosecond (500 fs) laser pulses at identical energy levels. A molecular ion is clearly observed in both spectra, but the efficiency is improved 10-fold when a femtosecond laser is used, indicating the distinct advantage of ultrashort laser pulses for multiphoton ionization of nucleobases in supersonic jet spectrometry.
authors.forename: C H
authors.initials: CH
authors.lastname: Lin
authors.forename: J
authors.initials: J
authors.lastname: Matsumoto
authors.forename: S
authors.initials: S
authors.lastname: Ohtake
authors.forename: T
authors.initials: T
authors.lastname: Imasaka