A simple apparatus for determining column density and absolute photoabsorption cross sections

H. S. Fung; C. C. Chu; S. J. Hsu; H. H. Wu; T. S. Yih

doi:10.1063/1.1150494

A simple apparatus for determining column density and absolute photoabsorption cross sections

H. S. Fung, C. C. Chu, S. J. Hsu, H. H. Wu, T. S. Yih

Department of Physics

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

This article presents a simple measuring apparatus that is capable of measuring column density and absolute photoabsorption cross sections. The apparatus includes a simple high-temperature heatpipe furnace, an MKS Instruments Baratron, a hydrogen discharge lamp, and an optical detecting system. The heatpipe furnace provides an absorbing medium with a steady total pressure in a closed system so that the column density can be obtained using the ideal gas relation. The apparatus is designed for a working temperature range below 1000 K and a pressure range up to 10 Torr. Encountered experimental difficulties and their found solutions will be discussed in detail. In this work, the absolute photoabsorption cross section of Mg is measured near the 3s threshold using this apparatus. The absolute photoabsorption cross section result at the 3s threshold, which is 2.1 ± 0.3 Mb, is in good agreement with hook method data (2.36 Mb).

Original language	English
Pages (from-to)	1564-1568
Number of pages	5
Journal	Review of Scientific Instruments
Volume	71
Issue number	3
DOIs	https://doi.org/10.1063/1.1150494
State	Published - Mar 2000

Access to Document

10.1063/1.1150494

Cite this

@article{2ad72e6767d64abcaabbc92540f453fc,

title = "A simple apparatus for determining column density and absolute photoabsorption cross sections",

abstract = "This article presents a simple measuring apparatus that is capable of measuring column density and absolute photoabsorption cross sections. The apparatus includes a simple high-temperature heatpipe furnace, an MKS Instruments Baratron, a hydrogen discharge lamp, and an optical detecting system. The heatpipe furnace provides an absorbing medium with a steady total pressure in a closed system so that the column density can be obtained using the ideal gas relation. The apparatus is designed for a working temperature range below 1000 K and a pressure range up to 10 Torr. Encountered experimental difficulties and their found solutions will be discussed in detail. In this work, the absolute photoabsorption cross section of Mg is measured near the 3s threshold using this apparatus. The absolute photoabsorption cross section result at the 3s threshold, which is 2.1 ± 0.3 Mb, is in good agreement with hook method data (2.36 Mb).",

author = "Fung, {H. S.} and Chu, {C. C.} and Hsu, {S. J.} and Wu, {H. H.} and Yih, {T. S.}",

year = "2000",

month = mar,

doi = "10.1063/1.1150494",

language = "???core.languages.en_GB???",

volume = "71",

pages = "1564--1568",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

number = "3",

}

TY - JOUR

T1 - A simple apparatus for determining column density and absolute photoabsorption cross sections

AU - Fung, H. S.

AU - Chu, C. C.

AU - Hsu, S. J.

AU - Wu, H. H.

AU - Yih, T. S.

PY - 2000/3

Y1 - 2000/3

N2 - This article presents a simple measuring apparatus that is capable of measuring column density and absolute photoabsorption cross sections. The apparatus includes a simple high-temperature heatpipe furnace, an MKS Instruments Baratron, a hydrogen discharge lamp, and an optical detecting system. The heatpipe furnace provides an absorbing medium with a steady total pressure in a closed system so that the column density can be obtained using the ideal gas relation. The apparatus is designed for a working temperature range below 1000 K and a pressure range up to 10 Torr. Encountered experimental difficulties and their found solutions will be discussed in detail. In this work, the absolute photoabsorption cross section of Mg is measured near the 3s threshold using this apparatus. The absolute photoabsorption cross section result at the 3s threshold, which is 2.1 ± 0.3 Mb, is in good agreement with hook method data (2.36 Mb).

AB - This article presents a simple measuring apparatus that is capable of measuring column density and absolute photoabsorption cross sections. The apparatus includes a simple high-temperature heatpipe furnace, an MKS Instruments Baratron, a hydrogen discharge lamp, and an optical detecting system. The heatpipe furnace provides an absorbing medium with a steady total pressure in a closed system so that the column density can be obtained using the ideal gas relation. The apparatus is designed for a working temperature range below 1000 K and a pressure range up to 10 Torr. Encountered experimental difficulties and their found solutions will be discussed in detail. In this work, the absolute photoabsorption cross section of Mg is measured near the 3s threshold using this apparatus. The absolute photoabsorption cross section result at the 3s threshold, which is 2.1 ± 0.3 Mb, is in good agreement with hook method data (2.36 Mb).

UR - http://www.scopus.com/inward/record.url?scp=0006677989&partnerID=8YFLogxK

U2 - 10.1063/1.1150494

DO - 10.1063/1.1150494

M3 - 期刊論文

AN - SCOPUS:0006677989

SN - 0034-6748

VL - 71

SP - 1564

EP - 1568

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 3

ER -

A simple apparatus for determining column density and absolute photoabsorption cross sections

Abstract

Access to Document

Fingerprint

Cite this