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s isomeric state in 
IrGillespie, S. A.*; Andreyev, A. N.; Al Monthery, M.*; Barton, C. J.*; Antalic, S.*; Auranen, K.*; Badran, H.*; Cox, D.*; Cubiss, J. G.*; O'Donnell, D.*; et al.
Physical Review C, 99(6), p.064310_1 - 064310_6, 2019/06
被引用回数：3 パーセンタイル：32.64(Physics, Nuclear)An experiment has been performed to study excited states in the neutron-deficient nucleus Ir via the use of the JUROGAM II high-purity germanium detector array and the RITU gas-filled separator at JYFL, Jyv
skyl. By using isomer tagging, an isomeric state with a half-life of 6.58(15) s has been observed in Ir for the first time. It has been established that the isomer decays via a 45.2 (
) - 26.1 (
) keV cascade to new states below the previously reported ground state in Ir with 
. We now reassign this 
state to the isomeric state discovered in this study.
Gu, Y. J.*; Klimo, O.*; Kumar, D.*; Liu, Y.*; Singh, S. K.*; Esirkepov, T. Z.; Bulanov, S. V.; Weber, S.*; Korn, G.*
Physical Review E, 93(1), p.013203_1 - 013203_6, 2016/01
被引用回数：27 パーセンタイル：87.49(Physics, Fluids & Plasmas)The magnetic quadrupole structure formation during the interaction of two ultrashort high power laser pulses with a collisionless plasma is demonstrated with 2.5-dimensional particle-in-cell simulations. The subsequent expansion of the quadrupole is accompanied by magnetic-field annihilation in the ultrarelativistic regime, when the magnetic field cannot be sustained by the plasma current.
Gu, Y. J.*; Klimo, O.*; Kumar, D.*; Bulanov, S. V.; Esirkepov, T. Z.; Weber, S.*; Korn, G.*
Physics of Plasmas, 22(10), p.103113_1 - 103113_9, 2015/10
被引用回数：10 パーセンタイル：45.26(Physics, Fluids & Plasmas)The magnetic field generated by the laser pulses annihilates in a current sheet formed between the pulses. Magnetic field energy is converted to an inductive longitudinal electric field, which efficiently accelerates the electrons of the current sheet. This new regime of collision less relativistic magnetic field annihilation with a timescale of tens of femtoseconds can be extended to near-critical and overdense plasma with the ultra-high intensity femtosecond laser pulses.
