Rotational branching ratios at low photoelectron energies in resonant enhanced multiphoton ionization of NO
نویسندگان
چکیده
We report calculated rotational branching ratios for very low energy ( 50 me V) photoelectrons resulting from (1 + 1 ') resonant enhanced multiphoton ionization ( REMPI) via the l; = 1/2, 3/2, 5/2, and 7/2levels ofthe P 11 branch of the A l:. + (3sa) state of NO. Even angular momentum transfer (AN=.N +N;) peaks are dominant in these rotational distributions, in agreement with the selection rule !::..N + I = odd. Angular momentum coupling in the photoelectron wave function arising from the molecular ion potential leads to smaller but appreciable !::..N = odd peaks. The calculated !::..N = 0 to !::..N = + 2 peak ratios show the same strong decrease when l; increases from 1/2 to 3/2 as seen in the experimental zero-kineticenergy (ZEKE) photoelectron spectra [Sander eta!., Phys. Rev. A 36,4543 ( 1987) ], but do not show the rapid die-off of the !::..N =I= 0 peaks for higher l; observed experimentally. The calculated trend in the !::..N = + 2 vs !::..N = 0 peaks could be understood on the basis of simple angular momentum transfer arguments. These same arguments indicate that this trend in the !::..N = 0 and + 2 peaks with increasing angular momentum is not generally expected in other branches. Spectra via the R21 ( J) branch are presented to support this assertion. We also present photoelectron angular distributions which show a strong dependence on !::..N reflecting the changing composition of the photoelectron wave function.
منابع مشابه
Rotational branching ratios and photoelectron angular distributions in resonance enhanced multiphoton ionization of HBr via the F 1Δ2 Rydberg state
Articles you may be interested in Resonance enhanced multiphoton ionization photoelectron spectroscopy and pulsed field ionization via the F 1Δ2(v'=0) and f 3Δ2(v'=0) Rydberg states of HCl Rotationally resolved photoelectron spectra in resonance enhanced multiphoton ionization of H2O via the C 1 B 1 Rydberg state Rotational branching ratios and photoelectron angular distributions in resonance e...
متن کاملRotationally resolved photoelectron angular distributions in resonance enhanced multiphoton ionization of NO
We report calculated ionic rotational branching ratios and associated photoelectron angular distributions for ( 1 + 1') resonance enhanced multiphoton ionization ( REMPI) via the R 21 (20.5), P21 + Q11 (25.5), and P 11 (22.5) branches of theA 2 :I+(3so-) state of NO. The branching ratios are dominated by even angular momentum transfer peaks, in agreement with the ll.N +I= odd (ll.N=.N +N;) sele...
متن کاملEffects of Cooper minima in resonance enhanced multiphoton ionization‐ photoelectron spectroscopy of NO via the D 2Σ+ and C 2Π Rydberg states
Rotationally resolved photoelectron spectra in resonance enhanced multiphoton ionization of H2O via the C 1 B 1 Rydberg state Photoelectron studies of resonantly enhanced multiphoton ionization of H2 via the B' 1Σ+ u and D 1Π u states J. Cooper minima are predicted to occur in the 3pu-+ku(/ = 2) and 3pu-+k1T(/ = 2) channels in the resonance enhanced multi photon ionization of NO via the D 2~ + ...
متن کامل(1+1) resonant enhanced multiphoton ionization via the A2Σ+ state of NO: Ionic rotational branching ratios and their intensity dependence
متن کامل
Rotational branching ratios and photoelectron angular distributions in resonance enhanced multiphoton ionization of diatomic molecules
Articles you may be interested in Molecular‐orbital decomposition of the ionization continuum for a diatomic molecule by angle‐ and energy‐ resolved photoelectron spectroscopy. I. Formalism Complex angular momentum theory of molecular collisions: New phase rules for rotationally inelastic diffraction scattering in atom–homonuclear diatomic molecule collisions
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001