Issues

 / 

2017

 / 

September

  

Instruments and methods of investigation


Negative ion adsorption by the ion source surface as a factor influencing ion lifetime measurements

,
Institute of Molecular and Crystal Physics, Ufa Research Center, Russian Academy of Sciences, prosp. Oktyabrya 151, Ufa, 450075, Russian Federation

It is well known that negative ions that form in the gas phase due to low-energy electron capture by molecules show a scatter in the measured lifetimes of their autodetachment states. In considering this problem, it is found that when using a static sector magnetic mass spectrometer, some of the ions that form on the ionization chamber walls are adsorbed and stabilized there and then join the registered ion flow, thereby distorting the measured lifetime. Because the number of the adsorbed ions depends on the experimental conditions, their contribution to the total flow is to some extent uncontrollable—hence the scatter.

Text can be downloaded in Russian. English translation is available here.
Keywords: negative ions, resonance electron capture, mass spectrometry
PACS: 34.35.+a, 37.20.+j, 34.80.Gs (all)
DOI: 10.3367/UFNe.2017.01.038045
URL: https://ufn.ru/en/articles/2017/9/d/
Citation: Lukin V G, Khvostenko O G "Negative ion adsorption by the ion source surface as a factor influencing ion lifetime measurements" Phys. Usp. 60 911–930 (2017)
BibTexBibNote ® (generic)BibNote ® (RIS)Medline RefWorks
RT Journal
T1 Negative ion adsorption by the ion source surface as a factor influencing ion lifetime measurements
A1 Lukin,V.G.
A1 Khvostenko,O.G.
PB Physics-Uspekhi
PY 2017
FD 10 Sep, 2017
JF Physics-Uspekhi
JO Phys. Usp.
VO 60
IS 9
SP 911-930
DO 10.3367/UFNe.2017.01.038045
LK https://ufn.ru/en/articles/2017/9/d/

Received: 24th, May 2016, revised: 9th, January 2017, 17th, January 2017

Оригинал: Лукин В Г, Хвостенко О Г «Влияние поверхностной адсорбции отрицательных ионов в ионном источнике на результаты измерений их времени жизни» УФН 187 981–1002 (2017); DOI: 10.3367/UFNr.2017.01.038045

© 1918–2019 Uspekhi Fizicheskikh Nauk
Email: ufn@ufn.ru Editorial office contacts About the journal Terms and conditions