A Streak camera study of superfluorescence at multiple wavelengths from helium atoms excited using free electron laser pulses

Harries, J.; Iwayama, Hiroshi*; Nagasono, Mitsuru*; Togashi, Tadashi*; Yabashi, Makina*; Kuma, Susumu*; Nakajima, Kyo*; Miyamoto, Yuki*; Ohae, Chiaki*; Sasao, Noboru*; et al.

Journal of Physics B; Atomic, Molecular and Optical Physics, 48(10), p.105002_1 - 105002_9, 2015/05

https://doi.org/10.1088/0953-4075/48/10/105002

Transient charge dynamics in argon-cluster nanoplasmas created by intense extreme-ultraviolet free-electron-laser irradiation

Iwayama, Hiroshi*; Harries, J.; Shigemasa, Eiji*

Physical Review A, 91(2), p.021402_1 - 021402_5, 2015/02

https://doi.org/10.1103/PhysRevA.91.021402

Towards coherent control of SASE pulses using propagation through helium gas at wavelengths corresponding to double excitation

Harries, J.; Nagasono, Mitsuru*; Iwayama, Hiroshi*; Shigemasa, Eiji*

Journal of Physics B; Atomic, Molecular and Optical Physics, 46(16), p.164021_1 - 164021_5, 2013/08

https://doi.org/10.1088/0953-4075/46/16/164021

Demonstration of up-conversion fluorescence from Ar clusters in intense free-electron-laser fields

Iwayama, Hiroshi*; Nagasono, Mitsuru*; Harries, J.; Shigemasa, Eiji*

Optics Express (Internet), 20(21), p.23174 - 23179, 2012/10

https://doi.org/10.1364/OE.20.023174

Interatomic Coulombic decay following the Auger decay; Experimental evidence in rare-gas dimers

Ueda, Kiyoshi*; Fukuzawa, Hironobu*; Liu, X.*; Sakai, Katsunori*; Prmper, G.*; Morishita, Yuichiro*; Saito, Norio*; Suzuki, Isao*; Nagaya, Kiyonobu*; Iwayama, Hiroshi*; et al.

Journal of Electron Spectroscopy and Related Phenomena, 166-167, p.3 - 10, 2008/11

https://doi.org/10.1016/j.elspec.2008.03.002

Interatomic Coulombic decay (ICD) in Ar, ArKr and Kr following Ar 2p or Kr 3d Auger decay has been investigated by means of momentum-resolved electron-ion-ion-coincidence spectroscopy. This sequential decay leads to Coulombic dissociation into dication and monocation. Simultaneously determining the kinetic energy of the ICD electron and the kinetic energy release between the two atomic ions, we could unambiguously identify the ICD channels. We find that, in general, spin conserved ICD, in which the singlet (triplet) dicationic state produced via the atomic Auger decay preferentially decays to the singlet (triplet) state, transferring the energy to the other atom, is faster than the spin-flip ICD, in which the Auger final singlet (triplet) dicationic state decays to the triplet (singlet) state.

Multi-atom, multi-photon collective decay (superfluorescence) following EUV-FEL pumping of He

Nagasono, Mitsuru*; Harries, J.; Iwayama, Hiroshi*; Togashi, Tadashi*; Tono, Kensuke*; Yabashi, Makina*; Semba, Yasunori*; Ohashi, Haruhiko*; Ishikawa, Tetsuya*; Shigemasa, Eiji*

no journal, , 

Coherent spontaneous decay following multi-atom excitationwith FEL pulses; Prospects for X-ray superradiance from clusters

Harries, J.; Nagasono, Mitsuru*; Iwayama, Hiroshi*; Togashi, Tadashi*; Tono, Kensuke*; Yabashi, Makina*; Semba, Yasunori*; Ohashi, Haruhiko*; Ishikawa, Tetsuya*; Shigemasa, Eiji*

no journal, , 

A Gas monochromator for SASE pulses using absorption in the vicinity of the doubly-excited states in helium

Harries, J.; Iwayama, Hiroshi*; Nagasono, Mitsuru*; Shigemasa, Eiji*

no journal, , 

Superfluorescence from 1snp excited helium studied using a streak camera

Harries, J.; Iwayama, Hiroshi*; Nagasono, Mitsuru*; Togashi, Tadashi*; Kuma, Susumu*; Nakajima, Kyo*; Shigemasa, Eiji*

no journal, , 

Multiple-transition superradiance from EUV-FEL excited helium atoms, 2; Experiment

Ohae, Chiaki*; Harries, J.; Iwayama, Hiroshi*; Kuma, Susumu*; Miyamoto, Yuki*; Nagasono, Mitsuru*; Nakajima, Kyo*; Shigemasa, Eiji*; Wakabayashi, Tomonari*; Sasao, Noboru*

no journal, , 

no abstracts in English