Results 51 to 60 of about 13,694 (213)

An injector testbed based on a direct current gun and an interchangeable very high frequency gun for superconducting continuous‐wave free‐electron lasers

Journal of Synchrotron Radiation, EarlyView.
An injector testbed for continuous‐wave free‐electron lasers based on a direct current gun and an interchangeable very high frequency gun is under construction. Its physical design and performance have been studied carefully.The continuous‐wave free‐electron laser (CW‐FEL), based on superconducting radiofrequency (SRF) technology with an electron bunch
Xinmeng Li, Jitao Sun, Yong Yu, Jiahang Shao, Jiayue Yang, Quan Zhou, Hongli Ding, Lei Shi, Kai Tao, Chenglin Guo, Zhigang He, Zhichao Chen, Zhen Chen, Shaohua Peng, Hongfei Wang, Guoqing Zhang, Baichao Zhang, Zongbin Li, Feng Zhao, Wei Wei, Maomao Huang, Wei Wang, Ming Liu, Chaofeng He, Liangbing Hu, Yaqiong Wang, Han Li, Weiming Yue, Xilong Wang, Guorong Wu, Dongxu Dai, Weiqing Zhang, Xueming Yang   +32 more
wiley   +1 more source

Identification of CO‐binding modes in the CuB site of bovine cytochrome c oxidase by spatial mapping of binding energy

The FEBS Journal, EarlyView.
Quantum simulations of the catalytic center (CuB) of cytochrome c oxidase, driving the electron transport system, revealed a crucial role of Val243 in modulation of ligand binding. Val243‐driven interaction facilitates hybridization between CO and Fe orbitals, thus highlighting Val243's impact on electronic structure and ligand dynamics.
Jiyoung Kang, Toru Matsuoka, Masaru Tateno   +2 more
wiley   +1 more source

PHOTODISSOCIATION OF CN

The Astrophysical Journal, 2013
CN rovibrational photodissociation cross sections have been computed using ab initio derived potential curves and dipole transition moment functions adjusted to match asymptotic experimental constraints where available. Here, we report results for the electronic transitions {sup 2}Σ{sup +}(4) ← X {sup 2}Σ{sup +}, {sup 2}Σ{sup +}(5) ← X {sup 2}Σ{sup +},
W. el-Qadi, Phillip C. Stancil
openaire   +2 more sources

Short-lived metal-centered excited state initiates iron-methionine photodissociation in ferrous cytochrome c

Nature Communications, 2021
The dissociation mechanism of the heme axial ligand in heme proteins is not yet fully understood. The authors investigate the photodissociation dynamics of the bond between heme Fe and methionine S in ferrous cytochrome c using femtosecond time-resolved ...
Marco E. Reinhard, Michael W. Mara, Thomas Kroll, Hyeongtaek Lim, Ryan G. Hadt, Roberto Alonso-Mori, Matthieu Chollet, James M. Glownia, Silke Nelson, Dimosthenis Sokaras, Kristjan Kunnus, Tim Brandt van Driel, Robert W. Hartsock, Kasper S. Kjaer, Clemens Weninger, Elisa Biasin, Leland B. Gee, Keith O. Hodgson, Britt Hedman, Uwe Bergmann, Edward I. Solomon, Kelly J. Gaffney   +21 more
doaj   +1 more source

Spectroscopic analysis of bacterial photoreactivation

Photochemistry and Photobiology, Volume 101, Issue 2, Page 494-504, March/April 2025.
This study investigates the effectiveness of fluorescence and Raman spectroscopy in detecting bacterial photoreactivation. Fluorescence spectroscopy shows limitations, because the intense fluorescence of tryptophan and tyrosine masks fluorescence emitted by thymine molecules.
Keyvan Khosh Abady, Negar Karpourazar, Arjun Krishnamoorthi, Runze Li, Peter M. Rentzepis   +4 more
wiley   +1 more source

Photodissociation of interstellar N₂ [PDF]

Astronomy & Astrophysics, 2013
Molecular nitrogen is one of the key species in the chemistry of interstellar clouds and protoplanetary disks and the partitioning of nitrogen between N and N2 controls the formation of more complex prebiotic nitrogen-containing species. The aim of this work is to gain a better understanding of the interstellar N2 photodissociation processes based on ...
Wim Ubachs, Xiaohu Li, Brenton Lewis, Stephen Gibson, Ruud Visser, A. N. Heays, A. N. Heays, A. N. Heays, E. F. van Dishoeck   +8 more
openaire   +6 more sources

Photofragment Translational Spectroscopy

CHIMIA, 1994
Photofragment translational spectroscopy (PTS) is a technique for studying the mechanisms and the dynamics of photodissociation processes under collision-free conditions.
Peter Felder
doaj   +2 more sources

H i in Molecular Clouds: Irradiation by FUV Plus Cosmic Rays

The Astrophysical Journal, 2023
We extend the analytic theory presented by Sternberg et al. and Bialy & Sternberg for the production of atomic hydrogen (H i ) via far-ultraviolet (FUV) photodissociation at the boundaries of dense interstellar molecular (H _2 ) clouds to also include ...
Amiel Sternberg, Shmuel Bialy, Alon Gurman   +2 more
doaj   +1 more source

CALCULATION OF CHEMICAL EQUILIBRIUM IN THE INTERSTELLAR CLOUD

Odessa Astronomical Publications, 2017
In order to calculate the molecular concentrations in the interstellar cloud and to obtain heir spatial distribution we have made a computational code to solve the set of equations for chemical equilibrium and equations of charge and atom balance.
I. Shmeld, J. Freimanis, N. G. Bochkarev
doaj   +1 more source

Photodissociation spectroscopy via a rovibrational resonance in intense UV pulses

Physical Review Research, 2022
Photodissociation dynamics via a rovibrational resonance in intense UV pulses is investigated theoretically, using a showcase CH^{+} molecule promoted to the C^{1}Σ^{+} valence excited electronic state with a potential barrier, thus giving access to ...
Yan Rong Liu, Victor Kimberg, Yong Wu, Jian Guo Wang, Oriol Vendrell, Song Bin Zhang   +5 more
doaj   +1 more source