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Munshi G Mustafa Sudhir Raniwala T Awes B Rai RS Bhalerao JG Contreras RV Gavai SK Ghosh P Jaikumar GC Mishra AP Mishra H Mishra B Mohanty J Nayak J-Y Ollitrault SC Phatak L Ramello R Ray PK Sahu AM Srivastava DK Srivastava VK Tiwari 《Pramana》2006,67(5):961-981
This is the report of Heavy Ion Physics and Quark-Gluon Plasma at WHEPP-09 which was part of Working Group-4. Discussion and
work on some aspects of quark-gluon plasma believed to have created in heavy-ion collisions and in early Universe are reported. 相似文献
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Milton SV Gluskin E Biedron SG Dejus RJ Den Hartog PK Galayda JN Kim K Lewellen JW Moog ER Sajaev V Sereno NS Travish G Vinokurov NA Arnold ND Benson C Berg W Biggs JA Borland M Carwardine JA Chae Y Decker G Deriy BN Erdmann MJ Friedsam H Gold C Grelick AE 《Physical review letters》2000,85(5):988-991
Experimental evidence for self-amplified spontaneous emission (SASE) at 530 nm is reported. The measurements were made at the low-energy undulator test line facility at the Advanced Photon Source, Argonne National Laboratory. The experimental setup and details of the experimental results are presented, as well as preliminary analysis. This experiment extends to shorter wavelengths the operational knowledge of a linac-based SASE free-electron laser and explicitly shows the predicted exponential growth in intensity of the optical pulse as a function of length along the undulator. 相似文献
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Infrared-to-visible wave-length conversion in the Yb3+−Er3+ doped phosphors system has been described by a simple three level model based on two ions mechanism. The excitation in the
range of 900–1000 nm of an IR-photon is first absorbed by Yb3+ ion as a sensitizer attributed to the resonant energy transition in Er3+ ion from 4
I
3/2 → 4
S
15/2 and 1
F
9/2 → 4
I
15/2, respectively for green and red emission. The essential energy transfer processes in this system i.e. upconversion from 4
I
11/2 and 1
I
13/2, cross-relaxation from 4
S
3/2 and 1
F
9/2 are taken into account. The limitations of the rate-equation approach are examined with a focus on the underlying dynamics
of this rare-earth system. 相似文献
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P.K. Ummat R.K. Nkum W.R. Datars 《Physica C: Superconductivity and its Applications》1991,180(5-6):407-410
Magnetic susceptibility, X-ray diffraction and resistivity measurements of the system Bi1.4Pb0.6Sr2Ca2−xGaxCu3Oy are reported for 0 x 2. The high-Tc 2223 phase with a Tc of 107 K for x = 0 exists for x 0.3. The low-Tc 2212 phase with a Tc of 75 K for x = 0 exists for the full range of x. The highest values of the critical temperature and the largest volume fraction of the low-Tc phase in compounds with Ga occur for x = 0.5 ± 0.1. The identification of CaO by X-ray diffraction for x 0.6 indicates that Ga replaces Ca in the compound. 相似文献