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Spectra and Predissociation Dynamics of the 4pσB''∑ and 4pπD' Π States of D.
J Phys Chem A
July 2022
Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China.
The spectra and predissociation dynamics of the Rydberg states 4pσB″∑(υ'=2) and 4pπD'Π(υ'=1) of the D molecule have been studied by a combination of XUV laser pump, UV laser probe, and velocity map imaging methods. The D(2) fragment yield spectrum and the D excitation spectrum have been measured. Although the predissociation rates were found to be small and comparable to the radiative decay rates, the D(2) fragments were observed for all the Rydberg states.
View Article and Find Full Text PDFRotational characterization of the EΣ(5s6s S) Rydberg state of CdNe van der Waals complex via selective J-excitation in OODR process.
Spectrochim Acta A Mol Biomol Spectrosc
January 2022
Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland.
Spectroscopic rotational characterization of two υ=0 and υ=1 vibrational components of the EΣ(5s6sS) Rydberg state of CdNe van der Waals (vdW) complex has been performed using specially designed approach. In optical-optical double resonance (OODR) process, a selective J-excitation has been realized using the [Formula: see text] P) transition, with υ=0 level of the [Formula: see text] state as an intermediate in the excitation from υ=0 of the [Formula: see text] S) state. As a result, B and B rotational constants have been determined as well as the R equilibrium internuclear separation in the EΣ - state potential well.
View Article and Find Full Text PDFObservation of gerade Rydberg state of Cd van der Waals complex cooled in free-jet expansion beam and excited using optical-optical double resonance method.
Spectrochim Acta A Mol Biomol Spectrosc
May 2021
Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland. Electronic address:
We report on the observation of a gerade Rydberg electronic energy state of Cd van der Waals (vdW) complex vibrationally cooled in a free-jet expansion beam. Cd in the beam were excited from the X0(5S) ground via the b0(5P) intermediate to the final gerade state using optical-optical double resonance (OODR) method. A pronounced vibrational progression with partly resolved isotopologue components was recorded and analyzed.
View Article and Find Full Text PDFMeasurement of exclusive photoproduction from protons in Pb collisions at .
Eur Phys J C Part Fields
March 2019
University of Wisconsin-Madison, Madison, WI USA.
The exclusive photoproduction of meson states from protons, (with ), is studied in ultraperipheral Pb collisions at a centre-of-mass energy per nucleon pair of . The measurement is performed using the decay mode, with data collected by the CMS experiment corresponding to an integrated luminosity of 32.6 .
View Article and Find Full Text PDFPredissociation dynamics of D + hv→ D(1s) + D(2p, 2s) revealed by the spin-orbit state resolved fragment branching ratios and angular distributions.
J Chem Phys
April 2019
Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China.
For molecular photodissociations, the spin-orbit state resolved fragment branching ratios and angular distributions provide deep insight into the dynamics. For the first excited state of the H(2p) atom, a branching ratio measurement is a challenge because of small energy spacing between them. For the D(2p) fragments from the predissociation of D + 14.
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