Mean excitation energies for molecular ions

详细信息    查看全文

• 作者：Phillip W.K. Jensen^a ; Stephan P.A. Sauer^a ; Jens Oddershede^b ; ^c ; John R. Sabin^b ; ^c ; ^{sabin@qtp.ufl.edu}
• 关键词：Molecular ions ; Stopping power ; Mean excitation energy ; Polarization propagator
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：394
• 期：Complete
• 页码：73-80
• 全文大小：2064 K
• 卷排序：394

文摘

The essential material constant that determines the bulk of the stopping power of high energy projectiles, the mean excitation energy, is calculated for a range of smaller molecular ions using the RPA method. It is demonstrated that the mean excitation energy of both molecules and atoms increase with ionic charge. However, while the mean excitation energies of atoms also increase with atomic number, the opposite is the case for mean excitation energies for molecules and molecular ions. The origin of these effects is explained by considering the spectral representation of the excited state contributing to the mean excitation energy.