Wed·Mar 9, 2016Wednesday·March 9, 2016

1. 01*

   Investigation of activation cross sections of proton induced reactions on indium up to 70 MeV for practical applications

   F. Tárkányi · F. Ditrói🇭🇺 · A. Hermanne🇧🇪 · S. Takács🇭🇺 · M. Baba

   Excitation functions were measured for production of the ${}^{113,111,110}$Sn, ${}^{115m,114m,113m,112m,111g,110g}$In and ${}^{111m,109}$Cd radioisotopes by bombardment of In targets with proton beams up to 70 MeV, some of them for the first time. The new results are compared with the earlier experimental data and with the theoretical data in the TENDL-2014 (Talys1.6 based) library. Thick target yields were deduced and application of the new data for production of medically relevant ${}^{110m}$In, ${}^{111g}$In, ${}^{113m}$In and ${}^{114m}$In, as well as applicability for thin layer activation (TLA) are discussed.

   nucl-exAppl.Radiat.Isot.(2016)·5 citations
2. 02*

   From the stable to the exotic: clustering in light nuclei

   C. Beck🇫🇷

   A great deal of research work has been undertaken in alpha-clustering study since the pioneering discovery of 12C+12C molecular resonances half a century ago. Our knowledge on physics of nuclear molecules has increased considerably and nuclear clustering remains one of the most fruitful domains of nuclear physics, facing some of the greatest challenges and opportunities in the years ahead. The occurrence of "exotic" shapes in light N=Z alpha-like nuclei is investigated. Various approaches of the superdeformed and hyperdeformed bands associated with quasimolecular resonant structures are presented. Evolution of clustering from stability to the drip-lines is examined: clustering aspects are, in particular, discussed for light exotic nuclei with large neutron excess such as neutron-rich Oxygen isotopes with their complete spectroscopy.

   nucl-exnucl-thFIAS Interdisc.Sci.Ser.(2017)·4 citations
3. 03*

   Fluctuations as a test of chemical non-equilibrium at the LHC

   Viktor Begun🇵🇱

   It is shown that large chemical potential leads to the significant increase of multiplicity fluctuations for bosons, and makes the fluctuations infinite in the case of Bose-Einstein condensation. It allows to distinguish between the models that explain the anomalous proton to pion ratio and the low transverse momentum enhancement of pion spectra in Pb+Pb collisions at the LHC within chemical equilibrium or non-equilibrium models. The effects of resonance decays, finite size of the system, requirements to the event statistics, different momentum cuts, and limited detector acceptance are considered. The obtained results show the possibility to observe a substantial increase of the normalized kurtosis for positively or negatively charged pions in the case of non-equilibrium or partial pion condensation using currently measured data.

   ↳ nucl-thhep-phnucl-exPRC(2016)·28 citations
4. 04*

   Probing nuclear bubble configuration by the ${\pi }^{-}/{\pi }^{+}$ ratio in heavy-ion collisions

   Gao-Chan Yong🇨🇳

   It is theoretically and experimentally argued that there may exist bubble or toroid-shaped configurations in some nucleus systems. Based on the nuclear transport model, it is shown that compared with the collision of normal nuclei, there is a depletion of central density of compression with bubble configurations in projectile and target nuclei. This depletion of central compression density may affect some observables in heavy-ion collisions.

   ↳ nucl-thnucl-exEPJA(2016)·8 citations
5. 05*

   $K^{+}$-nucleus potentials from $K^{+}$-nucleon amplitudes

   E. Friedman🇮🇱

   Optical potentials for $K^{+}$-nucleus interactions are constructed from $K^{+}$-nucleon amplitudes using recently developed algorithm based on $K^{+}$-N kinematics in the nuclear medium. With the deep penetration of $K^{+}$ mesons into the nucleus at momenta below 800~MeV/c it is possible to test this approach with greater sensitivity than hitherto done with $K^{-}$ and pions. The energy-dependence of experimental reaction and total cross sections on nuclei is better reproduced with this approach compared to fixed-energy amplitudes. The inclusion of Pauli correlations in the medium also improves the agreement between calculation and experiment. The absolute scale of the cross sections is reproduced very well for ${}^6$Li but for C, Si and Ca calculated cross sections are (23$\pm 4$)\% smaller than experiment, in agreement with earlier analyses. Two phenomenological models that produce such missing strength suggest that the imaginary part of the potential needs about 40\% enhancement.

   ↳ nucl-thnucl-exNPA(2016)·4 citations
6. 06*

   Challenges in Nuclear Structure Theory

   Witold Nazarewicz🇺🇸

   The goal of nuclear structure theory is to build a comprehensive microscopic framework in which properties of nuclei and extended nuclear matter, and nuclear reactions and decays can all be consistently described. Due to novel theoretical concepts, breakthroughs in the experimentation with rare isotopes, increased exchange of ideas across different research areas, and the progress in computer technologies and numerical algorithms, nuclear theorists have been quite successful in solving various bits and pieces of the nuclear many-body puzzle and the prospects are exciting. This article contains a brief, personal perspective on the status of the field.

   ↳ nucl-thnucl-exJ.Phys.G(2016)·31 citations
7. 07*

   A systematic study of the initial state in heavy ion collisions based on the quark participant assumption

   Liang Zheng🇨🇳 · Zhongbao Yin🇨🇳

   We investigate the initial state geometric quantities of heavy ion collisions based on the quark participant assumption in the Glauber multiple scattering approach. A systematic comparison to the nucleon participant assumption has been presented and confronted with the charged multiplicity measurements in various collision systems. It is found that the quark participant based assumption can be important to understand the data in multiplicity production and the initial spatial eccentricity in small systems.

   ↳ nucl-thnucl-exEPJA(2016)·23 citations
8. 08*

   Using 220Rn to calibrate liquid noble gas detectors

   M. Kobayashi🇯🇵 · M. Yamashita🇯🇵 · A. Takeda🇯🇵 · K. Kishimoto🇯🇵 · S. Moriyama🇯🇵

   In this paper, we describe 220Rn calibration source that was developed for liquid noble gas detectors. The key advantage of this source is that it can provide 212Bi-212Po consecutive events, which enables us to evaluate the vertex resolution of a detector at low energy by comparing low-energy events of 212Bi and corresponding higher-energy alpha-rays from 212Po. Since 220Rn is a noble gas, a hot metal getter can be used when introduced using xenon as the carrier gas. In addition, no long-life radioactive isotopes are left behind in the detector after the calibration is complete; this has clear advantage over the use of 222Rn which leaves long- life radioactivity, i.e., 210Pb. Using a small liquid xenon test chamber, we developed a system to introduce 220Rn via the xenon carrier gas; we demonstrated the successful introduction of 6 times 10^2 220Rn atoms in our test environment.

   ↳ physics.ins-detastro-ph.COhep-exnucl-exJ.Phys.Conf.Ser.(2016)·2 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.