Excess electron transport in cryoobjects
Experimental results on excess electron transport in solid and liquid phases of Ne, Ar, and solid N₂-Ar mixture are presented and compared with those for He. Muon spin relaxation technique in frequently switching electric fields was used to study the phenomenon of delayed muonium formation: excess e...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2003 |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2003
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| Zitieren: | Excess electron transport in cryoobjects / D.G. Eshchenko, V.G. Storchak, J.H. Brewer, S.P. Cottrell S.F.J. Cox // Физика низких температур. — 2003. — Т. 29, № 3. — С. 250-262. — Бібліогр.: 39 назв. — англ. |
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Eshchenko, D.G. Storchak, V.G. Brewer, J.H. Cottrell, S.F.J. Cox, S.P. 2018-01-14T09:02:32Z 2018-01-14T09:02:32Z 2003 Excess electron transport in cryoobjects / D.G. Eshchenko, V.G. Storchak, J.H. Brewer, S.P. Cottrell S.F.J. Cox // Физика низких температур. — 2003. — Т. 29, № 3. — С. 250-262. — Бібліогр.: 39 назв. — англ. 0132-6414 PACS: 72.15.Rn, 67.40.Jg, 72.20.Jv, 73.20.Jc https://nasplib.isofts.kiev.ua/handle/123456789/128814 Experimental results on excess electron transport in solid and liquid phases of Ne, Ar, and solid N₂-Ar mixture are presented and compared with those for He. Muon spin relaxation technique in frequently switching electric fields was used to study the phenomenon of delayed muonium formation: excess electrons liberated in the m⁺ ionization track converge upon the positive muons and form Mu (m⁺e⁻) atoms. This process is shown to be crucially dependent upon the electron`s interaction with its environment (i.e., whether it occupies the conduction band or becomes localized in a bubble of tens of angstroms in radius) and upon its mobility in these states. The characteristic lengths involved are 10⁻⁶-10⁻⁴ cm, the characteristic times range from nanoseconds to tens microseconds. Such a microscopic length scale sometimes enables the electron spend its entire free lifetime in a state which may not be detected by conventional macroscopic techniques. The electron transport processes are compared in: liquid and solid helium (where electron is localized in buble); liquid and solid neon (where electrons are delocalized in solid and the coexistence of localized and delocalized electrons states was found in liquid recently); liquid and solid argon (where electrons are delocalized in both phases); orientational glass systems (solid N₂-Ar mixtures), where our results suggest that electrons are localized in orientational glass. This scaling from light to heavy rare gases enables us to reveal new features of excess electron localization on microscopic scale. Analysis of the experimental data makes it possible to formulate the following tendency of the muon end-of-track structure in condensed rare gases. The muon-self track interaction changes from the isolated pair (muon plus the nearest track electron) in helium to multi-pair (muon in the vicinity of tens track electrons and positive ions) in argon. This work was supported by the Canadian Institute for Advanced Research, the Natural Sciences and Engineering Research Council of Canada, the National Research Council of Canada, and the Engineering and Physical Sciences Research Council of the United Kingdom. Two of us (VGS and DGE) were also supported by the INTAS Foundation (through grant 97-30063) and the Royal Society (through the International Award), NATO (through grant PST.CLG.977687). We would like to thank Prof. V.N. Gorelkin for useful discussions. DGE and VGS also express their gratitude to Profs. S.T. Belyaev, V.P. Martemyanov, and V.A. Matveev for constant support. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Electronically Induced Phenomena: Low Temperature Aspects Excess electron transport in cryoobjects Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Excess electron transport in cryoobjects |
| spellingShingle |
Excess electron transport in cryoobjects Eshchenko, D.G. Storchak, V.G. Brewer, J.H. Cottrell, S.F.J. Cox, S.P. Electronically Induced Phenomena: Low Temperature Aspects |
| title_short |
Excess electron transport in cryoobjects |
| title_full |
Excess electron transport in cryoobjects |
| title_fullStr |
Excess electron transport in cryoobjects |
| title_full_unstemmed |
Excess electron transport in cryoobjects |
| title_sort |
excess electron transport in cryoobjects |
| author |
Eshchenko, D.G. Storchak, V.G. Brewer, J.H. Cottrell, S.F.J. Cox, S.P. |
| author_facet |
Eshchenko, D.G. Storchak, V.G. Brewer, J.H. Cottrell, S.F.J. Cox, S.P. |
| topic |
Electronically Induced Phenomena: Low Temperature Aspects |
| topic_facet |
Electronically Induced Phenomena: Low Temperature Aspects |
| publishDate |
2003 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
Experimental results on excess electron transport in solid and liquid phases of Ne, Ar, and solid N₂-Ar mixture are presented and compared with those for He. Muon spin relaxation technique in frequently switching electric fields was used to study the phenomenon of delayed muonium formation: excess electrons liberated in the m⁺ ionization track converge upon the positive muons and form Mu (m⁺e⁻) atoms. This process is shown to be crucially dependent upon the electron`s interaction with its environment (i.e., whether it occupies the conduction band or becomes localized in a bubble of tens of angstroms in radius) and upon its mobility in these states. The characteristic lengths involved are 10⁻⁶-10⁻⁴ cm, the characteristic times range from nanoseconds to tens microseconds. Such a microscopic length scale sometimes enables the electron spend its entire free lifetime in a state which may not be detected by conventional macroscopic techniques. The electron transport processes are compared in: liquid and solid helium (where electron is localized in buble); liquid and solid neon (where electrons are delocalized in solid and the coexistence of localized and delocalized electrons states was found in liquid recently); liquid and solid argon (where electrons are delocalized in both phases); orientational glass systems (solid N₂-Ar mixtures), where our results suggest that electrons are localized in orientational glass. This scaling from light to heavy rare gases enables us to reveal new features of excess electron localization on microscopic scale. Analysis of the experimental data makes it possible to formulate the following tendency of the muon end-of-track structure in condensed rare gases. The muon-self track interaction changes from the isolated pair (muon plus the nearest track electron) in helium to multi-pair (muon in the vicinity of tens track electrons and positive ions) in argon.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/128814 |
| citation_txt |
Excess electron transport in cryoobjects / D.G. Eshchenko, V.G. Storchak, J.H. Brewer, S.P. Cottrell S.F.J. Cox // Физика низких температур. — 2003. — Т. 29, № 3. — С. 250-262. — Бібліогр.: 39 назв. — англ. |
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| first_indexed |
2025-12-07T13:31:40Z |
| last_indexed |
2025-12-07T13:31:40Z |
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1850856492682444801 |