# Calculations of electron inelastic mean free paths. XIII. Data for 14 organic compounds and water over the 50 eV to 200 keV range with the relativistic full Penn algorithm.

https://mdr.nims.go.jp/datasets/628e072a-5a29-40ff-8ea4-d9ee45b871a7

## File

- [IMFP_XIII_preprint.pdf](https://mdr.nims.go.jp/filesets/7b547dd1-8286-43f1-a5f5-fc2b78051c06/download) ([Detail](https://mdr.nims.go.jp/filesets/7b547dd1-8286-43f1-a5f5-fc2b78051c06.md))

## Id

628e072a-5a29-40ff-8ea4-d9ee45b871a7

## Local identifier

identifier: mdr-schema-yaml/d504rp563

## Visibility

open_to_public

## State

published

## Created at

2022-06-24T10:23:40.703856Z

## Updated at

2024-01-05T13:12:16.623271Z

## Published at

2022-06-24T10:23:41.046422Z

## Doi

https://doi.org/10.48505/nims.3281

## First published url

https://doi.org/10.1002/sia.7064

## Date published

2022-02-03

## Recorded date published

2022-5

## Resource type

journal_article

## Manuscript type

na

## Collection



## Title

- title: Calculations of electron inelastic mean free paths. XIII. Data for 14 organic
    compounds and water over the 50 eV to 200 keV range with the relativistic full
    Penn algorithm.
  title_type: original
  lang: en

## Description

- description: We have calculated inelastic mean free paths (IMFPs) for 14 organic
    compounds (26-n-paraffin, adenine, β-carotene, diphenyl-hexatriene, guanine, Kapton,
    polyacetylene, poly(butene-1-sulfone), polyethylene, polymethylmethacrylate, polystyrene,
    poly(2-vinylpridine), thymine, and uracil) and liquid water for electron energies
    from 50 eV to 200 keV with the relativistic full Pen algorithm including the correction
    of the bandgap effect in insulators. These calculations were made with energy-loss
    functions (ELFs) obtained from measured optical constants and from calculated
    atomic scattering factors for X-ray energies. Our calculated IMFPs could be fitted
    to a modified form of the relativistic Bethe equation for inelastic scattering
    of electrons in matter from 50 eV to 200 keV. The average root-mean-square (RMS)
    deviation in these fits was 0.17 %. The IMFPs were also compared with a relativistic
    version of our predictive Tanuma-Powell-Penn (TPP-2M) equation. The average RMS
    deviation in these comparisons was 7.2 % for energies between 50 eV and 200 keV.
    This average RMS deviation is lower than that found in a similar comparison for
    our group of 41 elemental solids (11.9 %) and for our group of 42 inorganic compounds
    (10.7%) for the same energy range. We found generally satisfactory agreement between
    our calculated IMFPs and values from other calculations for energies between 200
    eV and 10 keV. We also found reasonable agreement between our IMFPs for organic
    compounds and measured IMFPs for energies between 50 eV and 200 keV. Substantial
    progress for IMFP measurements for liquid water has been made in recent years
    through the invention of liquid-water microjet photoelectron spectroscopy and
    droplet photoelectron imaging. We found that the IMFPs from these experiments
    and the associated analyses were larger than our IMFPs by factors between two
    and four for energies between about 30 eV and 1000 eV. The energy dependences
    of the measured IMFPs are, however, similar to that of our IMFPs in the same energy
    range. Since IMFPs calculated from the same algorithm for a number of inorganic
    compounds agree reasonably well with measured IMFPs for energies between 100 eV
    and 200 keV, the large differences between IMFPs for water from recent experiments
    and our results are surprising and need to be resolved with additional experiments.
  description_type: abstract
  lang: en

## Creator

- name: Tanuma, Shigeo
  role: author
  orcid: https://orcid.org/0000-0003-2628-9941
- name: Powell, CJ
  role: author
  orcid: https://orcid.org/0000-0001-8990-2286
- name: Shinotsuka, Hiroshi
  role: author
  orcid: https://orcid.org/0000-0001-5147-1396

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## Keyword

- subject: electron inelastic mean free paths
  schema: not_defined
- subject: organic compounds
  schema: not_defined
- subject: FPA
  schema: not_defined
- subject: bandgap correction
  schema: not_defined
- subject: liquid water
  schema: not_defined
- subject: IMFP
  schema: not_defined

## Rights

- description: Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  identifier: https://creativecommons.org/licenses/by-nc/4.0/

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## Fileset

- id: 7b547dd1-8286-43f1-a5f5-fc2b78051c06
  filename: IMFP_XIII_preprint.pdf
  content_type: application/pdf
  size: 3257338
  md5: fb4437bccb6760bec26ee4f71fe40f4f

## Thumbnail

fileset_id: 7b547dd1-8286-43f1-a5f5-fc2b78051c06
filename: IMFP_XIII_preprint.pdf