Photoelectron imaging spectroscopy for (2+1) resonance-enhanced multiphoton ionization of atomic iodine produced from A-band photolysis of CH3I

Abstract

Articles you may be interested inEffect of laser spectral bandwidth on coherent control of resonance-enhanced multiphoton-ionization photoelectron spectroscopy

Photoelectron imaging of 8p Rydberg states of atomic iodine following methyl iodide A-band decomposition

“…The violation of core-conserving ionization is attributed to several factors including the autoionization resonance in the ionization continuum and the configuration interaction of the resonance state with the other excited states with different ion cores [8]. However, a nearly identical relative branching ratio was observed by Jung et al [8] and the present work for ( 3 P 2 )8p[3] 5/2 intermediate state (see Table 1).…”

“…Although three states among the 8p Rydberg series have been reported by Jung et al [8], others remain unstudied and a comprehensive study is needed. Besides, the perturbations on 5p 4 ( 3 P 2 )np series have been reported to be particularly large for n = 8 [5], and thus, interesting information is expected when a new technique is employed.…”

“…Following the application of velocity map imaging technique [10], directly and simultaneously measuring the velocity and angular distributions of photoions (or photoelectrons [11]) with high resolution becomes practicable. By taking the advantage of the photoelectron imaging, Jung and co-workers studied 5p 4 6p, 5p 4 7p, 5p 4 8p and 5p 4 4f Rydberg series of atomic iodine among the wavelength region of 277-313 nm via (2 + 1) resonance-enhanced multiphoton ionization (REMPI) scheme [8]. They found that the final ion level distributions are generally dominated by the core-level conserving propensity of resonant excited-state.…”

“…Furthermore, A-band photodissociation of CH 3 I can be treated as a good source of study on spectroscopy for both iodine atom and methyl radical. And many works have been carried out by taking this advantage and much valuable information has been obtained [5][6][7][8][9]. Among the 5p 4 nl Rydberg series of I atom, 5p 4 np Rydberg series have attracted much attention and were frequently studied.…”

Mass resolved MPI spectra of methyl iodide in the 430–490 nm region

“…Methyl iodide, as the simplest molecule of alkyl iodides and a prototypical system for experimental investigation and theoretical model of photodissociation processes in polyatomic molecules [3,4], lots of multiphoton ionization and dissociation of the molecule have been studied [5][6][7][8][9][10][11][12][13][14][15][16][17]. There still exist lots of different views about the multiphoton ionization mechanism and the assignments of some vibrational structures of Rydberg state.…”