Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge
The liquid ⁴He at fixed temperature 4.2 K and different pressures up to 8 MPa was excited by corona discharge of both negative and positive polarity. Emission of He I atomic lines and He₂ molecular bands are observed. In negative corona the lines spectra show a distinct blue-shift and line-broadenin...
Збережено в:
| Дата: | 2011 |
|---|---|
| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2011
|
| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/118567 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge / Z.-L. Li, N. Bonifaci, A. Denat, V.M. Atrazhev, V.A. Shakhatov, K. von Haeften // Физика низких температур. — 2011. — Т. 37, № 5. — С. 484–490. — Бібліогр.: 37 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
irk-123456789-118567 |
|---|---|
| record_format |
dspace |
| spelling |
irk-123456789-1185672017-05-31T03:08:35Z Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge Li, Z.-L. Bonifaci, N. Denat, A. Atrazhev, V.M. Shakhatov, V.A. von Haeften, K. 8th International Conference on Cryocrystals and Quantum Crystals The liquid ⁴He at fixed temperature 4.2 K and different pressures up to 8 MPa was excited by corona discharge of both negative and positive polarity. Emission of He I atomic lines and He₂ molecular bands are observed. In negative corona the lines spectra show a distinct blue-shift and line-broadening, which becomes stronger with the pressure increasing. The rotational structure of molecular bands is resolved at pressures (0.1–0.2) MPa. The blue shift of the Q-branch maximum at different pressures was observed. Rotational temperature of 900 K has been estimated for the d³Σ⁺u-b³Πg molecular band. A positive corona was realized on a point anode for fewer radii of the electrode and larger voltage than in the negative corona. Electric currents in both negative and positive corona differ weakly. Spectral analysis of the radiation from the positive corona shows qualitative differences of spectral features of these discharges. The spectra observed in the positive corona have marked nonsymmetric shape. The asymmetric atomic and molecular spectra show an increased intensity of their long-length (red) wings. 2011 Article Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge / Z.-L. Li, N. Bonifaci, A. Denat, V.M. Atrazhev, V.A. Shakhatov, K. von Haeften // Физика низких температур. — 2011. — Т. 37, № 5. — С. 484–490. — Бібліогр.: 37 назв. — англ. 0132-6414 PACS: 36.40.Mr, 71.35.Aa, 73.20.–r, 78.40.–q http://dspace.nbuv.gov.ua/handle/123456789/118567 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
8th International Conference on Cryocrystals and Quantum Crystals 8th International Conference on Cryocrystals and Quantum Crystals |
| spellingShingle |
8th International Conference on Cryocrystals and Quantum Crystals 8th International Conference on Cryocrystals and Quantum Crystals Li, Z.-L. Bonifaci, N. Denat, A. Atrazhev, V.M. Shakhatov, V.A. von Haeften, K. Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge Физика низких температур |
| description |
The liquid ⁴He at fixed temperature 4.2 K and different pressures up to 8 MPa was excited by corona discharge of both negative and positive polarity. Emission of He I atomic lines and He₂ molecular bands are observed. In negative corona the lines spectra show a distinct blue-shift and line-broadening, which becomes stronger with the pressure increasing. The rotational structure of molecular bands is resolved at pressures (0.1–0.2) MPa. The blue shift of the Q-branch maximum at different pressures was observed. Rotational temperature of 900 K has been estimated for the d³Σ⁺u-b³Πg molecular band. A positive corona was realized on a point anode for fewer radii of the electrode and larger voltage than in the negative corona. Electric currents in both negative and positive corona differ weakly. Spectral analysis of the radiation from the positive corona shows qualitative differences of spectral features of these discharges. The spectra observed in the positive corona have marked nonsymmetric shape. The asymmetric atomic and molecular spectra show an increased intensity of their long-length (red) wings. |
| format |
Article |
| author |
Li, Z.-L. Bonifaci, N. Denat, A. Atrazhev, V.M. Shakhatov, V.A. von Haeften, K. |
| author_facet |
Li, Z.-L. Bonifaci, N. Denat, A. Atrazhev, V.M. Shakhatov, V.A. von Haeften, K. |
| author_sort |
Li, Z.-L. |
| title |
Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge |
| title_short |
Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge |
| title_full |
Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge |
| title_fullStr |
Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge |
| title_full_unstemmed |
Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge |
| title_sort |
atomic and molecular spectra emitted by normal liquid ⁴he excited by corona discharge |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2011 |
| topic_facet |
8th International Conference on Cryocrystals and Quantum Crystals |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/118567 |
| citation_txt |
Atomic and molecular spectra emitted by normal liquid ⁴He excited by corona discharge / Z.-L. Li, N. Bonifaci, A. Denat, V.M. Atrazhev, V.A. Shakhatov, K. von Haeften // Физика низких температур. — 2011. — Т. 37, № 5. — С. 484–490. — Бібліогр.: 37 назв. — англ. |
| series |
Физика низких температур |
| work_keys_str_mv |
AT lizl atomicandmolecularspectraemittedbynormalliquid4heexcitedbycoronadischarge AT bonifacin atomicandmolecularspectraemittedbynormalliquid4heexcitedbycoronadischarge AT denata atomicandmolecularspectraemittedbynormalliquid4heexcitedbycoronadischarge AT atrazhevvm atomicandmolecularspectraemittedbynormalliquid4heexcitedbycoronadischarge AT shakhatovva atomicandmolecularspectraemittedbynormalliquid4heexcitedbycoronadischarge AT vonhaeftenk atomicandmolecularspectraemittedbynormalliquid4heexcitedbycoronadischarge |
| first_indexed |
2023-10-18T20:32:31Z |
| last_indexed |
2023-10-18T20:32:31Z |
| _version_ |
1796150471829749760 |