26 research outputs found
Π‘ΠΊΠ΅Π»Π΅ΡΠ½Π°Ρ ΠΈΠ·ΠΎΠΌΠ΅ΡΠΈΠ·Π°ΡΠΈΡ Π³Π΅ΠΏΡΠ°Π½ΠΎΠ² Π² ΠΏΡΠΈΡΡΡΡΡΠ²ΠΈΠΈ ΡΡΠΏΠ΅ΡΠΊΠΈΡΠ»ΠΎΡΠ½ΡΡ ΠΊΠ°ΡΠ°Π»ΠΈΠ·Π°ΡΠΎΡΠΎΠ² ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠΉ ΠΏΡΠΈΡΠΎΠ΄Ρ
The sequence of the formation of multi-branched heptane isomers was studied in liquid and gaseous phases over different liquid and solid superacid catalysts. It was found that this sequence does not depend on the phase state, catalyst nature, and conditions, evidencing in favor of common reaction mechanism. The 2,4-dimethylpentane transformation into 2,2-dimethylpentane can be explained by the intermediate formation of cyclobutyl carbocation.ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎ ΠΈΠ·ΡΡΠ΅Π½Π° ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΡ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΡΠ°Π·Π²Π΅ΡΠ²Π»Π΅Π½Π½ΡΡ
ΠΈΠ·ΠΎΠΌΠ΅ΡΠΎΠ² ΠΏΡΠΈ ΠΏΡΠ΅Π²ΡΠ°ΡΠ΅Π½ΠΈΠΈ Π½-Π³Π΅ΠΏΡΠ°Π½Π° Π² ΠΆΠΈΠ΄ΠΊΠΎΠΉ ΠΈ Π³Π°Π·ΠΎΠ²ΠΎΠΉ ΡΠ°Π·Π°Ρ
ΠΏΠΎΠ΄ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΆΠΈΠ΄ΠΊΠΈΡ
ΠΈ ΡΠ²Π΅ΡΠ΄ΠΎΠ³ΠΎ ΡΡΠΏΠ΅ΡΠΊΠΈΡΠ»ΠΎΡΠ½ΡΡ
ΠΊΠ°ΡΠ°Π»ΠΈΠ·Π°ΡΠΎΡΠΎΠ². ΠΠ°ΠΉΠ΄Π΅Π½ΠΎ, ΡΡΠΎ ΡΡΠ° ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎΡΡΡ Π½Π΅ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ ΡΠ°Π·ΠΎΠ²ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ, ΠΏΡΠΈΡΠΎΠ΄Ρ ΠΊΠ°ΡΠ°Π»ΠΈΠ·Π°ΡΠΎΡΠΎΠ² ΠΈ ΡΡΠ»ΠΎΠ²ΠΈΠΉ, ΡΡΠΎ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΠ΅Ρ ΠΎΠ± ΠΎΠ±ΡΠ΅ΠΌ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠ΅ ΡΠ΅Π°ΠΊΡΠΈΠΈ. ΠΡΠ΅Π²ΡΠ°ΡΠ΅Π½ΠΈΠ΅ 2,4-Π΄ΠΈΠΌΠ΅ΡΠΈΠ»ΠΏΠ΅Π½ΡΠ°Π½Π° Π² 2,2-Π΄ΠΈΠΌΠ΅ΡΠΈΠ»ΠΏΠ΅Π½ΡΠ°Π½ ΠΌΠΎΠΆΠ½ΠΎ ΠΎΠ±ΡΡΡΠ½ΠΈΡΡ ΠΏΡΠΎΠΌΠ΅ΠΆΡΡΠΎΡΠ½ΡΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠΈΠΊΠ»ΠΎΠ±ΡΡΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠ±ΠΊΠ°ΡΠΈΠΎΠ½Π°
Skeletal isomerization of heptanes over superacid catalysts of different nature
The sequence of the formation of multi-branched heptane isomers was studied in liquid and gaseous phases over different liquid and solid superacid catalysts. It was found that this sequence does not depend on the phase state, catalyst nature, and conditions, evidencing in favor of common reaction mechanism. The 2,4-dimethylpentane transformation into 2,2-dimethylpentane can be explained by the intermediate formation of cyclobutyl carbocation
Extra lightweight mechanical support structures with the integrated cooling system for a new generation of vertex detectors
The performance of new extra lightweight mechanical support structures with the integrated liquid cooling system for monolithic silicon pixel detectors has been investigated. These detectors will be used to upgrade the inner tracking system in the ALICE experiment at the CERN Large Hadron Collider. The extra lightweight mechanical support structures, together with the novel pixel detectors, provide a record-breaking total radiation length of 0.3% X 0 per layer, which will make it possible to considerably extend the physical program of investigations of the quark-gluon plasma in ultra-relativistic heavy-ion collisions at the Large Hadron Collider. This is particularly important in measuring the yields of heavy-flavor hadrons and low-mass dileptons with low transverse momenta. The experimental results of the thermal tests and the comparative analysis of five samples of extra lightweight mechanical support structures for monolithic silicon pixel detectors are presented. The high efficiency of heat drain using the liquid cooling system for a power density as high as 0.5 W/cm2 is show
Multi-purpose detector system for investigations of multinucleon transfer reactions
Section V. Equipment, Methods and Automation of Nuclear Experiments, Interaction of Nuclear Radiation with the Matter and Applications of Methods of Nuclear Physic
Multi-purpose detector system for investigations of multinucleon transfer reactions
Section V. Equipment, Methods and Automation of Nuclear Experiments, Interaction of Nuclear Radiation with the Matter and Applications of Methods of Nuclear Physic
Investigations of the new generation pixel detectors for ALICE experiment at LHC
We present the results from testing Monolithic Active Pixel Sensors of the detector ALPIDE (ALICE Pixel Detector). The purpose of these tests was to measure the pixel threshold and noise distributions in each of the four sectors of the detector, as well as the analysis of the hit maps produced by different radioactive sources
Extra lightweight mechanical support structures with the integrated cooling system for a new generation of vertex detectors
Experimental investigation of new ultra-lightweight support and cooling structures for the new Inner Tracking System of the ALICE Detector
Thermal cooling performances of extremely lightweight mechanical carbon fiber support structures with an integrated liquid cooling system for monolithic silicon pixel detectors have been investigated. The high heat removal efficiency using single-phase liquid flow is shown for a power density up to 0.5 W/cm. These solutions provide therefore possibility to build a detector with a record radiation length of 0.3% per layer, ensuring considerable extensions of the physical program of investigations of the quark-gluon plasma in ultra-relativistic heavy-ion collisions at the Large Hadron Collider