排序方式: 共有20条查询结果,搜索用时 13 毫秒
1.
Abramov B. M. Baznat M. Borodin Yu. A. Bulychjov S. A. Dukhovskoy I. A. Krutenkova A. P. Kulikov V. V. Martemianov M. A. Matsyuk M. A. Turdakina E. N. 《Physics of Atomic Nuclei》2021,84(4):467-474
Physics of Atomic Nuclei - In the FRAGM experiment at the heavy-ion accelerator $$-$$ accumulator complex ITEP $$-$$ TWA, yields of cumulative charged $$\pi$$ mesons have been measured in a... 相似文献
2.
B. M. Abramov L. Álvarez-Ruso Yu. A. Borodin S. A. Bulychjov I. A. Dukhovskoy A. I. Khanov A. P. Krutenkova V. V. Kulikov M. A. Matsuk I. A. Radkevich A. I. Sutormin E. N. Turdakina M. J. Vicente Vacas 《Physics of Atomic Nuclei》2002,65(2):229-235
The spectra of fast π + mesons from the π ? A → π + X reaction on A=6Li, 7Li, and 16O nuclei at a primary momentum of p 0=0.72 GeV/c (T 0=0.59 GeV) are measured at emission-angle values in the range ?=0°–14°. The results obtained in this way are compared with experimental data taken in other studies at lower energies and with the results of model calculations. The energy dependence of the cross sections and of shadowing effects is analyzed for the reactions in question that occur on lithium isotopes. 相似文献
3.
B. M. Abramov Yu. A. Borodin S. A. Bulychev I. A. Dukhovskoi A. P. Krutenkova V. V. Kulikov M. A. Martem’anov M. A. Matsuk E. N. Turdakina A. I. Khanov 《Bulletin of the Russian Academy of Sciences: Physics》2010,74(4):564-566
Spectra of light fragments from carbon ion fragmentation at an energy of 0.3 GeV/nucleon on a beryllium target were measured
at an angle of 3.5°. The fragment spectra covered both the evaporation and cumulative regions to higher energies than in previous
experiments. The spectrum slope parameters characterizing the temperature of expanding matter in these regions were determined
for protons and deuterons. 相似文献
4.
N. V. Churaev V. D. Sobolev M. J. Setzer K. G. Sabbatovskii T. A. Vorob'eva N. V. Turdakina A. Liebrecht 《Colloid Journal》2005,67(6):769-773
The complex study of filtration and electric properties of the samples of cement stone with different water-cement ratios is performed. It is established that filtration coefficient decreases by 4–6 times with an increase in a pressure drop and becomes constant at pressure drops above 3–3.5 MPa. The observed effect is interpreted as a reversible change in the internal structure of cement stone upon the filtration of a liquid through the stone. It is revealed that the filtration coefficient and porosity of samples decrease with time. Total open porosity and the most probable pore radius are determined by mercury porosity technique. Coefficients of structural resistance and pore tortuosity of the samples are determined from the comparison of through and total porosity. The values of streaming potential are measured and values of surface charge and potential of the samples of cement stone are calculated. 相似文献
5.
B. M. Abramov P. N. Alexeev Yu. A. Borodin S. A. Bulychjov K. K. Gudima I. A. Dukhovskoy A. P. Krutenkova V. V. Kulikov M. A. Martemianov M. A. Matsyuk E. N. Turdakina A. I. Khanov 《Physics of Atomic Nuclei》2018,81(3):330-337
The differential cross sections for the yields of nuclear fragments at an angle of 3.5? in the fragmentation of carbon nuclei with energy 0.95 GeV per nucleon on a beryllium target were measured in the FRAGM experiment at the ITEP TWA heavy-ion accelerator. The momentum spectra of fragments were used to test the following four models of ion–ion interactions: BC, INCL++, LAQGSM03.03, and QMD. For light fragments, the slope parameters of the kinetic-energy spectra were obtained in the cumulative region. 相似文献
6.
B. M. Abramov Yu. A. Borodin S. A. Bulychev I. A. Dukhovskoi A. P. Krutenkova V. V. Kulikov M. A. Martem’yanov M. A. Matsyuk E. N. Turdakina A. I. Khanov 《Bulletin of the Russian Academy of Sciences: Physics》2009,73(6):716-719
Data on the yields of hydrogen isotopes (p, d, t) and helium isotopes (from 3He to 8He) at the angle of 3.5° in fragmentation of the carbon ions with the energy of 0.3 GeV/nucleon on the beryllium target are reported. The momentum spectra of the fragments in the rest frame of the fragmenting nucleus are measured in a considerably larger momentum range than in the previous experiments. 相似文献
7.
B. M. Abramov P. N. Alekseev Yu. A. Borodin S. A. Bulychjov I. A. Dukhovskoy A. P. Krutenkova V. V. Kulikov S. G. Mashnik M. A. Martemianov M. A. Matsyuk E. N. Turdakina A. I. Khanov 《Physics of Atomic Nuclei》2016,79(9-10):1419-1423
Momentum distributions of nuclear fragments at an angle of 3.5° in the interaction of 0.6-GeV/nucleon carbon ions with a beryllium target are measured in the FRAGM experiment on the ITEP-TWAC facility. The measured spectra are used for testing predictions of four ion–ion interaction models: BC, QMD, INCL, and LAQGSM03.03, and for comparison with the analytical parameterization within the thermodynamic concept of fragmentation. 相似文献
8.
B. M. Abramov Yu. A. Borodin S. A. Bulychjov I. A. Dukhovskoy A. P. Krutenkova V. V. Kulikov M. A. Matsyuk I. A. Radkevich E. N. Turdakina A. I. Khanov 《JETP Letters》2000,71(9):359-361
The plane-wave approximation was used to examine the proton Fermi-momentum distribution in experiments on quasielastic large-momentum-transfer pion-nucleon scattering in light nuclei 6Li, 7Li, and 12C. It was found that, unlike the (e, e′) reaction, the Fermi-gas model is in poor agreement with experiment, whereas the oscillator model adequately describes the spectrum shape. However, the parameters obtained for these distributions are sizably smaller than those derived from the (e, e′)) experiments. This suggests that the plane-wave approach is inadequate and that more complicated theoretical approaches, supposedly allowing for pion-nucleon amplitude modification in nuclear matter, are necessary for the analysis of experimental data. 相似文献
9.
B. M. Abramov M. Baznat Yu. A. Borodin S. A. Bulychjov I. A. Dukhovskoy A. P. Krutenkova V. V. Kulikov M. A. Martemianov M. A. Matsyuk E. N. Turdakina A. I. Khanov 《Physics of Atomic Nuclei》2019,82(6):623-629
Differential cross sections for the production of nuclear fragments at an angle of 3.5° in the fragmentation of 2-GeV/nucleon carbon ions on a beryllium target were measured in the FRAGM experiment performed at the ITEP-TWA heavy-ion accelerator-accumulator complex. The predictions of four Monte Carlo models of ion-ion interactions (BC, INCL, LAQGSM, and QMD) were tested on the basis of a comparison with the momentum spectra of fragments. Successes and drawbacks of these models are discussed. The energy spectra of protons and 3He nuclei in the cumulative region in the projectile rest frame are well described by an exponential dependence, which make it possible to estimate temperature parameters of their emission source. 相似文献
10.
B. M. Abramov P. N. Alekseev Yu. A. Borodin S. A. Bulychjov I. A. Dukhovskoy A. P. Krutenkova V. V. Kulikov M. A. Martemyanov M. A. Matsyuk E. N. Turdakina A. I. Khanov 《JETP Letters》2013,97(8):439-443
The proton yields at an angle of 3.5° have been measured in the FRAGM experiment on the fragmentation of carbon ions with the energies T 0 = 0.6, 0.95, and 2.0 GeV/nucleon on a beryllium target at the heavy-ion accelerator complex TWAC (terawatt accumulator, Institute for Theoretical and Experimental Physics). The data are represented in the form of the dependences of the invariant cross section for proton yield on the cumulative variable x in the range of 0.9 < x < 2.4. This invariant cross section varies within six orders of magnitude. The proton spectra have been analyzed within the theoretical approach of the fragmentation of quark clusters with the fragmentation functions obtained in the quark-gluon string model. The probabilities of the existence of six- and nine-quark clusters in the carbon nuclei are estimated as 8–12 and 0.2–0.6%, respectively. The results are compared to the estimated of quark effects obtained by other methods. 相似文献