The Cross-section Of Measurement And The Research For Entanglement Criterion

Neutron cross-sections are one of the important contents in nuclear physics. It is useful for various studies related to nuclear reactions and nuclear structure. Also it is basic data used in nuclear technology and nuclear power. In this paper, the cross sections for the ¹¹²Sn(n,2n)¹¹¹Sn,¹¹⁸Sn(n,2n) ¹¹⁷Sn, ¹²⁴Sn (n,2n)¹²³mSn,¹¹⁸Sn(n,α)¹¹⁵Cd, ¹²⁰Sn(n,α)¹¹⁷gCd and ¹²⁰Sn(n,α)¹¹⁷mCd reactions have been measured in the neutron energy range of 13.5-14.6 MeV using the activation technique. The neutron energies in the measurements were determined by cross section ratios for ⁹³Nb(n,2n)^92mNb and ⁹⁰Zr(n, 2n)^89m+gZr reactions. Cross sections were evaluated by the code HFTT. The excitation function curves were made out. The features of cross sections changing with the neutron energies were analyzed and compared with the literature values.Quantum entanglement is an important physical resource and its quantification becomes a vital subject of quantum information theory. In recent years, quantification of entanglement has attracted great attention. However, only the entanglement of low-dimensional quantum systems, especially that of multipartite quantum systems, remains an open question. We construct high order two-mode, multimode, high order multimode and drive quantum entanglement criterion using the Heisenberg and Schr?dinger-Robertson uncertainty relations based on SU (1,1), SU (2) algebraic model in conjunction with partial transposition for detecting entanglement.