Reliability of Results of Photonuclear Experiments for $${}^{58}$$ Ni

Physics of Atomic Nuclei - The reliability of experimental data on the cross sections ( $$\gamma,1n$$ ) and ( $$\gamma,2n$$ ) partial reaction cross sections measured for $${}^{58}$$ Ni nuclei in...     

Photoneutron Reactions on $${}^{\mathbf{129}}$$ Xe Nuclei and Their Electromagnetic Dissociation in Colliders

The electromagnetic dissociation of ultrarelativistic nuclei has a substantial impact on the lifetime of beams in the Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC), and secondary nuclei produced upon this dissociation may have an adverse effect on collider components. At the same time, the detection of neutrons originating from the electromagnetic dissociation process makes it possible to monitor the luminosity of colliders. In order to calculate the total and partial cross sections for the electromagnetic dissociation process by the Weizsäcker–Williams method, one needs reliable photonuclear reaction models preliminarily tested via a comparison of the results that they produce with available experimental data. Since the commissioning of the LHC, attention has been given primarily to $${}^{208}$$Pb–$${}^{208}$$Pb collisions. A run involving $${}^{129}$$Xe nuclei was also performed. In contrast to the case of $${}^{208}$$Pb nuclei, for which the photonuclear reaction and electromagnetic dissociation cross sections have been measured at various laboratories, there are no data for $${}^{129}$$Xe. By employing the experimental–theoretical method, the ($$\gamma,1n$$), ($$\gamma,2n$$), ($$\gamma,3n$$), and ($$\gamma$$, abs) cross sections for the $${}^{129}$$Xe nucleus are evaluated on the basis of available data for the neighboring nucleus of $${}^{127}$$I and the combined photonuclear reaction model (CPNRM). It is found that the results of CPNRM calculations performed for $${}^{129}$$Xe at photon energies up to 40 MeV by employing the TENDL-2017 library compiled by means of the TALYS code are close to one another and are in fairly good agreement with data obtained at the Saclay laboratory for $${}^{127}$$I. These new evaluated data, the TENDL-2017 library, and approximations of the total photoabsorption cross sections above the pion production threshold are used to calculate the electromagnetic dissociation cross section for $${}^{129}$$Xe at the LHC and at the FCC-hh collider being designed. The results of these calculations are compared with their counterparts obtained on the basis of the RELDIS model.     

Investigation of Excitation of $${K}$$ Isomers $${}^{{179m2}}$$ Hf and $${}^{{180m}}$$ Hf in ( $${\gamma,\gamma^{\prime}}$$ ) Reactions

Physics of Atomic Nuclei - The weighted-average cross sections for $${}^{179m2}$$ Hf and $${}^{180m}$$ Hf population in ( $$\gamma,\gamma^{\prime}$$ ) reactions induced by gamma rays of...     

The Supermarket Model with Bounded Queue Lengths in Equilibrium

Journal of Statistical Physics - In the supermarket model, there are n queues, each with a single server. Customers arrive in a Poisson process with arrival rate $$\lambda n$$ , where $$\lambda =...     

Peculiarity of the $${}^{{12}}$$ C(0 $${{}^{+}}$$ ) and $${}^{{12}}$$ C(2 $${{}^{+}}$$ ) Energy Spectrum in a 3 $$\alpha$$ Model

Physics of Atomic Nuclei - Lowest energy spectrum of the $${}^{12}$$ C nucleus is analyzed in the 3 $$\alpha$$ -cluster model with a deep $$\alpha\alpha$$ potential of Buck, Friedrich and Wheatley...     

Finite-Time Singularities of an Aggregation Equation in $${\mathbb {R}^n}$$ with Fractional Dissipation

We consider an aggregation equation in , n ≥ 2 with fractional dissipation, namely, , where 0 ≤ γ < 1 and K is a nonnegative decreasing radial kernel with a Lipschitz point at the origin, e.g. K(x) = e ^−|x|. We prove that for a class of smooth initial data, the solutions develop blow-up in finite time.     

Analysis of Angular $$\boldsymbol{t{-}\gamma}$$ Correlations in the Reaction $${}^{\boldsymbol{27}}$$ Al $$\boldsymbol{(\alpha,t)^{28}}$$ Si(2 $${}^{\boldsymbol{+}}$$ )

Physics of Atomic Nuclei - Angular $$t$$ – $$\gamma$$ correlations measured earlier in the reaction $${}^{27}$$ Al $$(\alpha,t)^{28}$$ Si(2 $${}^{+}$$ ) occurring at $$E_{\alpha}=30.3$$ MeV...     

Strong Resonances at High Excitation Energy in $${}^{\mathbf{17}}$$ O $$+$$ Alpha Resonance Scattering

Physics of Atomic Nuclei - The thick target inverse kinematics (TTIK) approach was used to measure excitation functions for the elastic $${}^{17}$$ O ( $$\alpha,\alpha$$ ) scattering at the initial...     

Simultaneous Investigation of the Nuclear Reactions $${}^{11}$$ B $$\boldsymbol{(p,3\alpha)}$$ and $${}^{11}$$ B $$\boldsymbol{(p,n)^{11}}$$ C as a New Tool for Determining the Absolute Yield of Alpha Particles in Picosecond Plasmas

Physics of Atomic Nuclei - The results of experimental investigations devoted to initiating the promising nuclear fusion reaction $${}^{11}$$ B $$(p,3\alpha)$$ in picosecond laser plasmas at a...     

Coherent Photoproduction of Neutral Pseudoscalar Mesons $$\boldsymbol{\pi^{0}\pi^{0}}$$ and $$\boldsymbol{\pi^{0}\eta}$$ on Light Nuclei

Physics of Atomic Nuclei - The coherent photoproduction of $$\pi^{0}\pi^{0}$$ and $$\pi^{0}\eta$$ on nuclei in the mass-number region of $$A\leqslant 7$$ is studied systematically over the range...     

Higher spin $${{\mathfrak {s}}}{{\mathfrak {l}}}_2$$ s l 2 R-matrix from equivariant (co)homology

Letters in Mathematical Physics - We compute the rational $${{\mathfrak {s}}}{{\mathfrak {l}}}_2$$ R-matrix acting in the product of two spin- $$\ell \over 2$$ ( $${\ell \in {\mathbb {N}}}$$ )...     

Studying the $$\alpha$$ -Decay Half-Lives of Nuclei in the Range $${68\leqslant Z\leqslant 118}$$ by Double-Folding and Cluster Formation Formalisms

Physics of Atomic Nuclei - In this study, we have systematically calculated $$\alpha$$ -decay half-lives for even–even nuclei in the range $$68\leqslant Z\leqslant 118$$ within the...     

More on boundary conditions for warped AdS $$_3$$ in GMG

The European Physical Journal C - We consider a $$U(1)_{B-L}$$ model with a $$Z^\prime $$ portal Dirac fermion dark matter (DM) $$\chi $$ of low mass which couples very weakly to the $$B - L$$...     

Measurement of the $$\boldsymbol{\Sigma^{0}/\Lambda^{0}}$$ Yield Ratio in $${pA}$$ Interactions at 70 GeV

Physics of Atomic Nuclei - The active target with C, Si and Pb plates was irradiated in 70-GeV proton beam at U-70 accelerator. The signal (270 events) from $$\Sigma^{0}\to\Lambda^{0}+\gamma$$...     

Investigation of the Yield of the Nuclear Reaction $${}^{{11}}$$ B( $${p,3\alpha}$$ ) Initiated by Powerful Picosecond Laser Radiation

Physics of Atomic Nuclei - The results obtained by experimentally and theoretically studying the yield of the promising nuclear-fusion reaction $${}^{11}$$ B( $$p,3\alpha$$ ) initiated by powerful...     

Form Factor and rms Radius of Proton Predicted Using Differential Cross-Section Data of $${p\bar{p}}$$ Elastic Scattering at $${\sqrt{s}=31}$$ , 53, 62 and 1960 GeV

Physics of Atomic Nuclei - Using differential cross-section data on $$p\bar{p}$$ elastic scattering at $$\sqrt{s}=31$$ , 53, 62, and 1960 GeV, for low momentum transfer square (...     

Correlation Between the Behavior of $${\alpha}$$ -Decay Half-Life Time and $$\boldsymbol{Q}$$ Values with Neutron Number Variation of Daughter Nuclei

Physics of Atomic Nuclei - $$\alpha$$ decay of 2000 parent heavy and superheavy nuclei, with atomic numbers in the range $$Z=80$$ to $$Z=122$$ , is considered. We calculated the half-life time,...     

New Measurements of Internal Conversion Coefficients in $${}^{{111}}$$ Cd

Physics of Atomic Nuclei - The 7.5-day beta decay of $${}^{111}$$ Ag is studied with a 60 cc HPGe gamma spectrometer system and a high transmission Mini-Orange magnetic spectrometer. Precise gamma...     

Cross-Section Calculation of ( $${n,p}$$ ) and ( $${n,2n}$$ ) Reactions for High Temperature Reactors Construction Materials Tungsten and Rhenium

Physics of Atomic Nuclei - In this study, cross-section calculations for ( $$n,2n$$ ) and ( $$n,p$$ ) reactions of Tungsten isotopes and Rhenium isotopes have been investigated using different...