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1.
L. S. Azhgirey V. V. Arkhipov S. V. Afanasiev V. K. Bondarev V. N. Zhmyro L. S. Zolin V. I. Ivanov A. Yu. Isupov A. A. Kartamyshev V. A. Kashirin V. I. Kolesnikov V. A. Kuznetsov V. P. Ladygin N. B. Ladygina A. G. Litvinenko S. G. Reznikov P. A. Rukoyatkin A. Yu. Semenov I. A. Semenova G. D. Stoletov G. Filipov A. N. Khrenov N. P. Yudin 《Physics of Atomic Nuclei》2003,66(4):690-699
The invariant differential cross section, the tensor analyzing power A yy , and the vector analyzing power A y for the reaction 9Be(d, p)X are measured at an initial deuteron momentum of 4.5 GeV/c and a proton detection angle of about 80 mrad. The data obtained for the differential cross section are consistent with the results of measurements at 3.5 and 5.78 GeV/c and a proton emission angle of 2.5°. The values found for the tensor analyzing power A yy are compared with similar data obtained previously for the deuteron-fragmentation process occurring on a carbon target at various values of the initial deuteron momentum and leading to proton emission at zero angle. The data on the differential cross section for the reaction 9Be(d, p)X can be satisfactorily described within the relativistic impulse approximation by using standard deuteron wave functions; however, the approach based on this conceptual framework proves to be inadequate in dealing with data on the tensor analyzing power. These results indicate that it is necessary either to change the method for describing the relativistic deuteron or to take into account additional mechanisms. 相似文献
2.
V. Grebenyuk V. Boreiko A. Dmitrotsa N. Gorbunov B. Khrenov P. Klimov M. Lavrova E. M. Popescu B. Sabirov A. Tkachenko L. Tkachev A. Volvach I. Yashin 《Physics of Particles and Nuclei Letters》2016,13(5):579-582
The purpose TUS space experiment is to study cosmic rays of ultrahigh energies produced by extensive air showers from space. The concentrator is located on satellite, made in the form of the Fresnel mirror towards the earth’s atmosphere, the focus of which is a photodetector. The angle of view of the mirror is ±4.5° that for a given height of the orbit corresponds to the area 80 × 80 km2 on ground. The ground complex consisting of a number of stations, to check the optical system of the experiment is created, (their location and the amount will be determined after the launch of the satellite based on its actual orbit). 相似文献
3.
Yu. V. Gurchin T. A. Vasil’ev A. Yu. Isupov Yu. T. Karachuk V. A. Krasnov A. K. Kurilkin P. K. Kurilkin V. P. Ladygin A. N. Livanov S. M. Piyadin S. G. Reznikov A. A. Terekhin A. N. Khrenov M. Janek 《Physics of Particles and Nuclei Letters》2011,8(6):571-575
A complex of detection equipment based on scintillation detectors for investigating dp elastic scattering at the internal target of the Nuclotron developed in the framework of the Deuteron Spin Structure (DSS) project is presented. The results of optimizing scintillation detectors and the results of test measurements of a deuteron beam of the Nuclotron are given. 相似文献
4.
V. P. Ladygin L. S. Azhgirey S. V. Afanasiev V. V. Arkhipov V. K. Bondarev G. Filipov A. Yu. Isupov V. I. Ivanov A. A. Kartamyshev V. A. Kashirin A. N. Khrenov V. I. Kolesnikov V. A. Kuznetsov N. B. Ladygina A. G. Litvinenko S. G. Reznikov P. A. Rukoyatkin A. Yu. Semenov I. A. Semenova G. D. Stoletov V. N. Zhmyrov L. S. Zolin 《The European Physical Journal A - Hadrons and Nuclei》2000,8(3):409-416
The tensor Ayy and vector Ay analyzing powers in the inelastic scattering of deuterons with a momentum of 4.5 GeV/c on beryllium at an angle of 80 mr in the vicinity of baryonic resonances excitation have been measured. The Ayy data being in good agreement with the previous results obtained at a zero angle demonstrate an approximate t scaling up to - 0.9 (GeV/c)2. The results of the experiment are compared with the predictions of the multiple-scattering and -meson exchange models.
Received: 20 April 2000 / Accepted: 29 May 2000 相似文献
5.
Heterophase polymerization in combination with ceric ion redox initiation offers some unique features with respect to the preparation of block copolymers and block copolymer particles. Various kinds of amphiphilic multi-block copolymers as well as electrosterically or sterically stabilized particles are easy accessible. A special feature of these particles is that they may consists of two different hydrophilic blocks and thus, leading to particles with a structured hydrophilic shell. The amphiphilic multiblock copolymers are used to form a new class of polymer dispersions by self-organization so-called polymeric colloidal complexes. In general, the particles of these complexes are structured and exhibit very often multiple morphologies. This principle of formation of polymer colloids is an easy way to prepare particles with an unusual morphology such as Janus-type particles. 相似文献
6.
M. Janek V. P. Ladygin S. M. Piyadin Yu. V. Gurchin A. Yu. Isupov J. T. Karachuk A. N. Khrenov A. K. Kurilkin P. K. Kurilkin A. N. Livanov G. Martinska S. G. Reznikov G. Tarjanyiova A. A. Terekhin 《Physics of Particles and Nuclei Letters》2018,15(1):76-82
Calibration procedure of ΔE ? E detectors used in dp breakup reaction measurement in the framework of DSS project is discussed. Time information from all PMTs along with amplitude information and known energy values of pp quasi elastic reaction are used to find calibration coefficients for ΔE and E detectors. Calibration coefficients are used to recover deposited particle energies. ΔE vs. E plots, energies and missing mass spectra are compared with geant4 Monte Carlo simulation. Missing mass for particular physical configuration is calculated as a test of the calibration procedure quality. 相似文献
7.
Redispersable and weakly cross-linked block copolymer particles with a core-shell structure were prepared by the use of a macroinitiator. Subsequent sulfonation of the polystyrene core and complex formation with a variety of cationic surfactants led to sterically stabilized, redispersable polyelectrolyte-surfactant complex particles with spherical shape and diameters of about 400 nm. Spontaneous microphase separation of the hydrophobic surfactant tails and the hydrophilic entities of the polyelectrolyte and the surfactant headgroups induces mesostructure formation within the particle cores. The characteristic lengths of the mesostructures formed depend mainly on the chain lengths of the surfactants and vary between 2 and 4 nm. For the first time, preformed nanoparticles were used as constrained nanogeometries for polyelectrolyte-surfactant complex formation. 相似文献
8.
S. V. Afanasiev L. S. Zolin A. Yu. Isupov V. P. Ladygin A. G. Litvinenko S. G. Reznikov A. N. Khrenov 《Physics of Atomic Nuclei》2014,77(1):22-30
Experimental results concerning the kaon yield in the reaction d + Be → K ±(0°) + X for values of the cumulative variable x c in the range between 0.88 and 1.37 are presented. Values in the region of x c ≥ 1 correspond to short nucleon-nucleon distances (deuteron-core region) at which nucleon wave functions begin overlapping each other, forming a cluster (flucton) where the hadron-matter density is higher than the average matter density in the nucleus. The behavior of the K +/K ? yield ratio in this region may be interpreted within the hypothesis that the quark sea in nuclei becomes harder because of the presence of a flucton component in nuclear matter. 相似文献
9.
L. S. Azhgirei T. A. Vasiliev Yu. V. Gurchin V. N. Zhmyrov L. S. Zolin A. Yu. Isupov A. K. Kurilkin P. K. Kurilkin V. P. Ladygin A. G. Litvinenko V. F. Peresedov S. M. Piyadin S. G. Reznikov A. A. Rovba P. A. Rukoyatkin A. V. Tarasov A. N. Khrenov M. Yanek 《Physics of Particles and Nuclei Letters》2010,7(1):27-32
The results of measurements and the handling procedure of data on the tensor polarization of the deuteron beam arising as the beam passes through matter obtained at the Nuclotron during the June 2008 run using an extracted unpolarized 5 GeV/c deuteron beam are described. The effect observed is compared with calculations made in the framework of the Glauber multiple-scattering theory. 相似文献
10.
L. S. Azhgirey Yu. V. Gurchin A. Yu. Isupov A. N. Khrenov A. S. Kiselev A. K. Kurilkin P. K. Kurilkin V. P. Ladygin A. G. Litvinenko V. F. Peresedov S. M. Piyadin S. G. Reznikov P. A. Rukoyatkin A. V. Tarasov T. A. Vasiliev V. N. Zhmyrov L. S. Zolin 《Physics of Particles and Nuclei Letters》2008,5(5):432-436
The tensor polarization of the deuteron beam arising as deuterons pass through a carbon target was measured. The experiment
was performed with an extracted unpolarized 5-GeV/c deuteron beam of the Nuclotron. The effect observed is compared with the calculations made using the Glauber multiple scattering
theory.
The text was submitted by the authors in English. 相似文献