Electron Correlation Dynamics in State-Selected Triatomic Molecules Following Double Photoionization
双光电离后状态选择三原子分子的电子相关动力学
基本信息
- 批准号:1807017
- 负责人:
- 金额:$ 30万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-09-01 至 2022-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Electrons can be ejected from molecules when they absorb energetic photons. This can weaken the bonds and cause the molecule to dissociate into ionic fragments. Studying ionization and dissociation processes in small molecules is important for testing quantum theories and for practical reasons such as understanding radiation damage. This research studies double photoionization of water molecules in which a single photon ejects two electrons. A sophisticated measurement method is used in which the ejected electrons and the ionic fragments are detected in coincidence to determine how they share energy and in which direction they move away from each other. The details of those measurements will help theoretical physicists refine quantum mechanical models of molecules that absorb ionizing radiation. Once the basic physics is understood and included in the theoretical models, the calculations can be used to understand how radiation interacts with larger molecules and materials.The well-known COLTRIMS technique will be used to study double photoionization of water molecules with 57 eV photons. The initial momenta of the photoelectrons and ionic fragments will be determined. In addition, the dication molecular state will be characterized prior to dissociation. The data analysis methods will also be able to project the electrons' momenta into the frame of the dissociated molecule. As a result, state-selected, body-fixed differential cross sections for the coupled photoelectrons can be determined, achieving as-yet unprecedented knowledge of the dissociating molecule.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
当分子吸收高能光子时,电子可以从分子中射出。 这可以削弱键,并导致分子解离成离子碎片。 研究小分子的电离和解离过程对于检验量子理论和理解辐射损伤等实际原因都很重要。 本文研究了水分子的双光电离,其中一个光子激发两个电子。 使用了一种复杂的测量方法,在这种方法中,喷射的电子和离子碎片被同时检测到,以确定它们如何共享能量以及它们彼此远离的方向。 这些测量的细节将帮助理论物理学家完善吸收电离辐射的分子的量子力学模型。 一旦理解了基本物理并将其纳入理论模型,计算就可以用来理解辐射如何与更大的分子和材料相互作用。众所周知的COLTRIMS技术将用于研究具有57 eV光子的水分子的双光电离。光电子和离子碎片的初始动量将被确定。 此外,在解离之前表征双阳离子分子状态。 数据分析方法也将能够将电子的动量投影到解离分子的框架中。 因此,可以确定耦合光电子的状态选择,体固定微分截面,实现解离分子的前所未有的知识。该奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(9)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Chiral photoelectron angular distributions from ionization of achiral atomic and molecular species
- DOI:10.1103/physrevresearch.2.033209
- 发表时间:2020-08-06
- 期刊:
- 影响因子:4.2
- 作者:Pier, Andreas;Fehre, Kilian;Doerner, Reinhard
- 通讯作者:Doerner, Reinhard
Photoelectron Diffraction Imaging of a Molecular Breakup Using an X-Ray Free-Electron Laser
- DOI:10.1103/physrevx.10.021052
- 发表时间:2020-06-08
- 期刊:
- 影响因子:12.5
- 作者:Kastirke, Gregor;Schoeffler, Markus S.;Jahnke, Till
- 通讯作者:Jahnke, Till
Dissociation dynamics of the water dication following one-photon double ionization. II. Experiment
- DOI:10.1103/physreva.98.053430
- 发表时间:2018-11-26
- 期刊:
- 影响因子:2.9
- 作者:Reedy, D.;Williams, J. B.;Landers, A. L.
- 通讯作者:Landers, A. L.
Double Core-Hole Generation in O2 Molecules Using an X-Ray Free-Electron Laser: Molecular-Frame Photoelectron Angular Distributions
- DOI:10.1103/physrevlett.125.163201
- 发表时间:2020-10-14
- 期刊:
- 影响因子:8.6
- 作者:Kastirke, Gregor;Schoeffler, Markus S.;Jahnke, Till
- 通讯作者:Jahnke, Till
Investigating resonant low-energy electron attachment to formamide: Dynamics of model peptide bond dissociation and other fragmentation channels
研究甲酰胺的共振低能电子附着:模型肽键解离和其他碎片通道的动力学
- DOI:10.1103/physrevresearch.3.013082
- 发表时间:2021
- 期刊:
- 影响因子:4.2
- 作者:Panelli, Guglielmo;Moradmand, Ali;Griffin, Brandon;Swanson, Kyle;Weber, Thorsten;Rescigno, Thomas N.;McCurdy, C. William;Slaughter, Daniel S.;Williams, Joshua B.
- 通讯作者:Williams, Joshua B.
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Joshua Williams其他文献
Don't Show A Hyena How Well You Can Bite: Performance, Race and the Animal Subaltern in Eastern Africa
不要向鬣狗展示你的咬合能力:东非的表演、种族和动物底层
- DOI:
- 发表时间:
2017 - 期刊:
- 影响因子:0
- 作者:
Joshua Williams - 通讯作者:
Joshua Williams
A Comparison of Secondary Principals' Use of Data Systems to Increase Student Achievement in Mathematics as Measured by Standardized Assessments.
通过标准化评估衡量中学校长使用数据系统提高学生数学成绩的比较。
- DOI:
- 发表时间:
2011 - 期刊:
- 影响因子:0
- 作者:
Joshua Williams - 通讯作者:
Joshua Williams
Geologic overview of the Mars Science Laboratory rover mission at the Kimberley, Gale crater, Mars
火星科学实验室火星车任务在火星金伯利盖尔陨石坑的地质概述
- DOI:
10.1002/2016je005200 - 发表时间:
2017 - 期刊:
- 影响因子:0
- 作者:
M. Rice;Sanjeev Gupta;A. Treiman;K. Stack;F. Calef;L. Edgar;J. Grotzinger;N. Lanza;L. Le Deit;J. Lasue;K. Siebach;A. Vasavada;R. Wiens;Joshua Williams - 通讯作者:
Joshua Williams
FINGERSPELLING AND PRINT PROCESSING SIMILARITIES IN DEAF AND HEARING READERS
聋哑人和听力正常读者的指纹拼写和打印处理相似性
- DOI:
- 发表时间:
2015 - 期刊:
- 影响因子:0
- 作者:
Joshua Williams - 通讯作者:
Joshua Williams
Input Biometric System Design for Handheld Devices
手持设备的输入生物识别系统设计
- DOI:
- 发表时间:
2014 - 期刊:
- 影响因子:0
- 作者:
Naif Alotaibi;Emmanuel Pascal Bruno;Michael J. Coakley;Alexander Gazarov;Vinnie Monaco;Stephen Winard;Filip Witkowski;Alecia Copeland;Peter Nebauer;Christopher Keene;Joshua Williams - 通讯作者:
Joshua Williams
Joshua Williams的其他文献
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{{ truncateString('Joshua Williams', 18)}}的其他基金
Attosecond Resolved Photoionization Studies of Atomic and Molecular Dynamics
原子和分子动力学的阿秒分辨光电离研究
- 批准号:
2208017 - 财政年份:2022
- 资助金额:
$ 30万 - 项目类别:
Continuing Grant
NSF East Asia and Pacific Summer Institute for FY 2012 in Korea
NSF 东亚及太平洋地区 2012 财年韩国暑期学院
- 批准号:
1209079 - 财政年份:2012
- 资助金额:
$ 30万 - 项目类别:
Fellowship Award
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