Fri·Jul 18, 2014Friday·July 18, 2014

1. 01*

   Irradiation of Nuclear Track Emulsions with Thermal Neutrons, Heavy Ions, and Muons

   D.A. Artemenkov🇷🇺 · V. Bradnova🇷🇺 · A. A. Zaitsev🇷🇺 · P. I. Zarubin🇷🇺 · I. G. Zarubina🇷🇺 · R. R. Kattabekov🇷🇺 · K. Z. Mamatkulov🇷🇺 · V. V. Rusakova🇷🇺

   Exposures of test samples of nuclear track emulsion were analyzed. Angular and energy correlations of products originating from the thermal-neutron-induced reaction n${}_{th}{+}^{10}$B ${\to }^7$Li $+(\gamma )+\alpha$ were studied in nuclear tack emulsions enriched in boron. Nuclear track emulsions were also irradiated with ${}^{86}$Kr${}^{+17}$ and ${}^{132}$Xe${}^{+26}$ of energy about 1.2 MeV per nucleon. Measurements of ranges of heavy ions in nuclear track emulsions made it possible to determine their energies on the basis of the SRIM model. The formation of high-multiplicity nuclear stars was observed upon irradiating nuclear track emulsions with ultrarelativistic muons. Kinematical features studied in this exposure of nuclear track emulsions for events of the muon-induced splitting of carbon nuclei to three alpha particles are indicative of the nuclear-diffraction interaction mechanism.

   nucl-exPhys.Atom.Nucl.(2015)·4 citations
2. 02*

   Correlations of alpha-particles in splitting of C-12 nuclei by neutrons of energy of 14.1 MeV

   R. R. Kattabekov🇷🇺 · K. Z. Mamatkulov🇷🇺 · D. A. Artemenkov🇷🇺 · V. Bradnova🇷🇺 · P. I. Zarubin🇷🇺 · I. G. Zarubina🇷🇺 · L. Majling · V. V. Rusakova🇷🇺 · A. B. Sadovsky

   Correlations of $\alpha$-particles are studied on statistics of 400 events of splitting ${}^{12}$C $\to$ 3$\alpha$ in nuclear track emulsion exposed to $14.1MeV$ neutrons. The ranges and emission angles of the $\alpha$-particles are measured. Distributions over energy of $\alpha$-particle pairs and triples are obtained.

   nucl-ex1 citation
3. 03*

   Measurement of the 10 keV resonance in the ${}^{10}$B($p,{\alpha }_0$)${}^7$Be reaction via the Trojan Horse Method

   C. Spitaleri · L. Lamia · S.M.R. Puglia · S. Romano · M. La Cognata · V. Crucilla · R.G. Pizzone · G.G. Rapisarda · M.L. Sergi · M. Gimenez Del Santo · N. Carlin · M. G. Munhoz and 15 other authors

   The ${}^{10}$B(p,${\alpha }_0$)${}^7$Be bare nucleus astrophysical S(E)-factor has been measured for the first time at energies from about 100 keV down to about 5 keV by means of the Trojan Horse Method (THM). In this energy region, the S(E)-factor is strongly dominated by the 8.699 MeV ${}^{11}$C level (J${}^{\pi }$=$\frac{5}{2}$${}^{+}$), producing an s-wave resonance centered at about 10 keV in the entrance channel. Up to now, only the high energy tail of this resonant has been measured, while the low-energy trend is extrapolated from the available direct data. The THM has been applied to the quasi-free ${}^2$H(${}^{10}$B,${\alpha }_0$${}^7$Be)n reaction induced at a boron-beam energy of 24.5 MeV. An accurate analysis brings to the determination of the ${}^{10}$B(p,${\alpha }_0$)${}^7$Be S(E)-factor and of the corresponding electron screening potential $U_e$, thus giving for the first time an independent evaluation of it.

   nucl-exPRC(2014)·60 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.