Results 101 to 110 of about 26,112 (242)
Global Ionospheric Responses to Four X‐Class Solar Flares in November 2025
Space Weather, Volume 24, Issue 11, November 2026.Abstract We investigate global ionospheric responses to four X‐class solar‐disk flares that occurred in November 2025 from the same solar active region, using multi‐instrument observations including GNSS, ionosonde, geomagnetic and GOES solar irradiance data. Pronounced dayside TEC enhancements are observed for three flares (#2 X1.2, #3 X5.1, and #4 X4.
Lei Liu, Shasha Zou
wiley +1 more source
Spin polarization in photoionization
, 1996 Heinzmann U, Cherepkov NA. Spin polarization in photoionization. In: Becker U, Shirley DA, eds. VUV and Soft X-Ray Photoionization Studies, Ser. "Physics of Atoms and Molecules".
Becker, U. +3 more
core
Multiple photoionization for the K shell in the Fe atom
, 2021 Multiple photoionization for the K shell in the Fe atom is studied for all levels of the ground configuration. The study shows that sextuple-photoionization cross sections dominate for all levels of the 3d64s2 configuration.
Šarūnas Masys +3 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.Abstract Metastable helium (He∗ ${\text{He}}^{\ast }$) in the thermosphere emits at 1,083 nm and provides a powerful diagnostic of thermospheric composition, solar radiation, and transport. Its detection remains challenging because of its extremely low density and high‐altitude.
Zhenwei Liu +12 more
wiley +1 more source
Photoionization of FE3+ Ions [PDF]
, 2003 Photoionization of Fe3+ ions was studied for the first time using synchrotron radiation from the Advanced Light Source (ALS) and the merged-beams technique.
Ovchinnikov, O., Schlachter, F.
core
Weak Positive Discharges Leading to Lightning Initiation
Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.Abstract Lightning‐initiating events in the Earth's atmosphere originate within compact regions of space with dimensions on the order of hundreds of meters. In the strongest events the associated current pulses propagate from positive to negative thundercloud charge centers at speeds approaching one tenth of the speed of light, a process referred to as
Victor P. Pasko +2 more
wiley +1 more source
Chemistry – A European Journal, Volume 32, Issue 39, 22 October 2026.The reaction between the methanol radical cation and sulfur dioxide is remarkably fast and forms several ionic and neutral products (HOSOH+, CH2OSO+, CH2OH+, CH2O, H2O, HSO2). The chemistry goes beyond simple proton or hydrogen transfer, revealing a close interaction between the two species, relevant to atmospheric and astrochemical environments where ...
Mauro Satta +3 more
wiley +1 more source
Forbidden photoionization and electron spin polarization [PDF]
, 1965 Forbidden photoionization and electron spin ...
Chiu, L.-Y. C.
core
Collectively enhanced resonant photoionization in a multiatom ensemble
, 2011 Photoionization of an atom via interatomic correlations to N neighboring atoms may be strongly enhanced due to constructive interference of quantum pathways.
Alexander B. Voitkiv +5 more
core +1 more source
The photoionization of Nitrogen and Oxygen molecules in intense field
四川大学学报. 自然科学版, 2017 In this work, the experimental techniques of supersonic molecular beam, femtosecond laser and time-of-flight (TOF) mass spectrometry were applied to investigate the photoionizations of nitrogen and oxygen molecules under intense femtosecond laser field ...
ZHANG Ke +3 more
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