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International Journal of Modern Physics E-nuclear Physics最新文献

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Particle species and collision energy dependencies of the midrapidity average transverse momenta of identified charged particles in Au+Au and Pb+Pb collisions in (Snn)1/2 = 62-5020GeV energy range at RHIC and LHC (Snn)1/2 = 62 ~ 5020gev能量范围内，RHIC和LHC中Au+Au和Pb+Pb碰撞中带电粒子的粒子种类和碰撞能量依赖关系
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-03-31 DOI: 10.1142/S0218301321500294
K. Olimov, Fu-Hu Liu, Kobil A. Musaev, A. K. Olimov, Boburbek J. Tukhtaev, N. Saidkhanov, B. Yuldashev, K. Olimov, K. Gulamov
{"title":"Particle species and collision energy dependencies of the midrapidity average transverse momenta of identified charged particles in Au+Au and Pb+Pb collisions in (Snn)1/2 = 62-5020GeV energy range at RHIC and LHC","authors":"K. Olimov, Fu-Hu Liu, Kobil A. Musaev, A. K. Olimov, Boburbek J. Tukhtaev, N. Saidkhanov, B. Yuldashev, K. Olimov, K. Gulamov","doi":"10.1142/S0218301321500294","DOIUrl":"https://doi.org/10.1142/S0218301321500294","url":null,"abstract":"The experimental spectra of [Formula: see text] versus the average pseudorapidity multiplicity density, [Formula: see text], and [Formula: see text] dependencies of the identified charged particles at midrapidity in Au[Formula: see text]Au and Pb[Formula: see text]Pb collisions at RHIC and LHC in (s[Formula: see text]-5020[Formula: see text]GeV energy range are described well with the proposed simple power model function. The degree of flattening of [Formula: see text] of the charged pions and kaons, protons and antiprotons in the analyzed heavy-ion collisions at RHIC and LHC in (s[Formula: see text]-5020[Formula: see text]GeV energy range are investigated analyzing the dependencies of the obtained exponent parameter [Formula: see text] of the simple power model function on the particle species and collision energy (s[Formula: see text]. The coincidence of the parameter [Formula: see text] for pions and kaons in Pb[Formula: see text]Pb collisions at (s[Formula: see text][Formula: see text]TeV, reflecting practically identical shapes of [Formula: see text] versus the average pseudorapidity multiplicity density, [Formula: see text], and [Formula: see text] spectra for pions and kaons in these collisions, is obtained. This important result is interpreted as due to creation of the highly thermalized QGP, where the difference between [Formula: see text], [Formula: see text] and [Formula: see text] flavors practically disappears, resulting in similar mechanisms of production of pions and kaons in Pb[Formula: see text]Pb collisions at (s[Formula: see text][Formula: see text]TeV.","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79841092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Limits on active-sterile neutrino mixing parameters using heavy nuclei abundances 利用重核丰度对活性惰性中微子混合参数的限制
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-03-31 DOI: 10.1142/S0218301321500282
M. M. Sáez, K. Fushimi, M. Mosquera, O. Civitarese
{"title":"Limits on active-sterile neutrino mixing parameters using heavy nuclei abundances","authors":"M. M. Sáez, K. Fushimi, M. Mosquera, O. Civitarese","doi":"10.1142/S0218301321500282","DOIUrl":"https://doi.org/10.1142/S0218301321500282","url":null,"abstract":"The production of heavy-mass elements due to the rapid neutron-capture mechanism (rprocess) is associated with astrophysical scenarios, such as supernovae and neutron-star mergers. In the r-process the capture of neutrons is followed by β-decays until nuclear stability is reached. A key element in the chain of nuclear weak-decays leading to the production of isotopes may be the change of the parameters controlling the neutrino sector, due to the mixing of active and sterile species. In this work we have addressed this question and calculated β-decay rates for the nuclei involved in the r-process chains as a function of the neutrino mixing parameters. These rates were then used in the calculation of the abundance of the heavy elements produced in core-collapse supernova and in neutron-star mergers, starting from different initial mass-fraction distributions. The analysis shows that the core-collapse supernova environment contributes with approximately 30% of the total heavy nuclei abundance while the neutron-star merger contributes with about 70% of it. Using available experimental data we have performed a statistical analysis to set limits on the active-sterile neutrino mixing angle and found a best-fit value sin2 2θ14 = 0.22, a value comparable with those found in other studies reported in the literature.","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74114702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Forward–backward multiplicity correlation and event-by-event multiplicity fluctuation in nucleus–nucleus collisions at 200A GeV 200A GeV下核-核碰撞的正反向多重性相关和事件间多重性波动
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-03-25 DOI: 10.1142/S021830132150021X
S. K. Manna, A. Mukhopadhyay, P. Mali
{"title":"Forward–backward multiplicity correlation and event-by-event multiplicity fluctuation in nucleus–nucleus collisions at 200A GeV","authors":"S. K. Manna, A. Mukhopadhyay, P. Mali","doi":"10.1142/S021830132150021X","DOIUrl":"https://doi.org/10.1142/S021830132150021X","url":null,"abstract":"Correlation among singly charged particles emitted in the forward and backward pseudo-rapidity cones is measured in [Formula: see text]O-Ag/Br and [Formula: see text]S-Ag/Br interactions at an incident energy of [Formula: see text] GeV/nucleon. Event-by-event fluctuations in the charged particle multiplicities and their pseudo-rapidity values are also investigated in terms of some known statistical measures. Evidences of short-ranged particle correlation and cluster formation in the pseudo-rapidity space are found from our analysis. A microscopic transport model based on the Ultra-relativistic Quantum Molecular Dynamics could not match the experimental results. The differences between experimental observation and corresponding simulation could neither be accounted for even when a Bose–Einstein type of correlation effect is implemented into the simulated data.","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"25 1","pages":"2150021"},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84088331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Proton radioactivity of nuclei with atomic numbers Z = 51–91 and mass number 104–211 原子序数Z = 51-91，质量数104-211的原子核的质子放射性
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-03-01 DOI: 10.1142/S0218301321500166
D. Poenaru, R. Gherghescu
{"title":"Proton radioactivity of nuclei with atomic numbers Z = 51–91 and mass number 104–211","authors":"D. Poenaru, R. Gherghescu","doi":"10.1142/S0218301321500166","DOIUrl":"https://doi.org/10.1142/S0218301321500166","url":null,"abstract":"Proton radioactivity of neutron-deficient nuclei with atomic numbers [Formula: see text]–91 and mass number 104–211 is investigated using the analytical super-asymmetric fission (ASAF) model — a model used to study [Formula: see text]-decay and cluster radioactivity since 1984. The experimental [Formula: see text] values are compared with calculated ones based on WS4 (Y. Z. Wang et al., 2014–2015), and in few cases KTUY05 (H. Koura et al., 2005) mass models. Proton drip-line and neutron drip-line are determined using the WS4 mass model. We compare the calculated results with experimental half-lives, showing good agreement.","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"3 1","pages":"2150016"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75928335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Semiclassical level density parameter with collective enhancements in nuclei 核中具有集体增强的半经典能级密度参数
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-03-01 DOI: 10.1142/S0218301321500208
Saniya Monga, H. Kaur
{"title":"Semiclassical level density parameter with collective enhancements in nuclei","authors":"Saniya Monga, H. Kaur","doi":"10.1142/S0218301321500208","DOIUrl":"https://doi.org/10.1142/S0218301321500208","url":null,"abstract":"In this work, we calculate the level density parameter for several nuclei by deploying the semiclassical trace formula for spherically symmetric harmonic oscillator potential with spin-orbit interactions, which describes the quantum shell effects in terms of the classical periodic orbits. With the usage of recently proposed Laplace like formula of level density parameter by Canbula et al., the effects of collective rotations and vibrations as well as deformations in nuclei are incorporated. The comparison of our results with the experimental ones show a good agreement. Later on, the study is also extended to the calculation of nuclear level density and survival probability in several superheavy nuclei (SHN).","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"23 1","pages":"2150020"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81584977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
ν − ν interactions in supernovae environments as a function of density and temperature 超新星环境中ν - ν相互作用作为密度和温度的函数
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-03-01 DOI: 10.1142/S021830132150018X
M. P. Colombi, O. Civitarese, A. Penacchioni
{"title":"ν − ν interactions in supernovae environments as a function of density and temperature","authors":"M. P. Colombi, O. Civitarese, A. Penacchioni","doi":"10.1142/S021830132150018X","DOIUrl":"https://doi.org/10.1142/S021830132150018X","url":null,"abstract":"Neutrinos in astrophysical environments, such as Supernovae (SNe), may interact through pair interactions. These interactions are density and temperature-dependent. Under certain conditions, a neutrino-condensate may form. In this work, we have adapted the separable nonlocal pairing interactions to the SN conditions and studied the temperature and density dependence of the pairing gap as well as the collective response with respect to these variables. We have applied the Bogoliubov transformations and solved the Bardeen, Cooper and Schrieffer (BCS) equations to construct the free quasi-particle sector of the Hamiltonian. The residual two-quasi-particle terms have been treated by applying the Tamm–Dancoff approximation (TDA) and random-phase approximation (RPA), suited to the extended neutrino media. With this, we have constructed neutrino energy distributions both in the superfluid and normal regimes and extracted critical values of the density and temperature.","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"2 1","pages":"2150018"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85391999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Grodzins relation for 41+ and 61+ states in A = 80, 100 and 130 region A = 80、100和130区域41+和61+状态的Grodzins关系
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-03-01 DOI: 10.1142/S0218301321500154
J. Gupta, Vikas Katoch
{"title":"Grodzins relation for 41+ and 61+ states in A = 80, 100 and 130 region","authors":"J. Gupta, Vikas Katoch","doi":"10.1142/S0218301321500154","DOIUrl":"https://doi.org/10.1142/S0218301321500154","url":null,"abstract":"The validity of the extended Grodzins product rule (GPR) for higher spins in the ground bands of even [Formula: see text], even [Formula: see text] nuclei of the light mass region of Cd to Zn chain of isotopes is studied. The plots of [Formula: see text]2, [Formula: see text]) versus [1/[Formula: see text]] ([Formula: see text], 6[Formula: see text] provide test of the linear relationship of the two entities. There seems to be a good correlation of the two entities at these higher spin states for most of the nuclei studied here. The deviations from linearity in specific cases are found to be useful for studying the variations in the nuclear structures involved. From these linearity plots, the structural change at higher spin in some nuclei involving subshell gaps, as reflected in the anomalous rise or saturation, leads to further insight into the under lying microscopic structure.","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"36 1","pages":"2150015"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82521289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gluon shadowing and nuclear entanglement entropy 胶子阴影和核纠缠熵
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-02-24 DOI: 10.1142/S0218301321500105
P. Castorina, A. Iorio, D. Lanteri, P. Lukeš
{"title":"Gluon shadowing and nuclear entanglement entropy","authors":"P. Castorina, A. Iorio, D. Lanteri, P. Lukeš","doi":"10.1142/S0218301321500105","DOIUrl":"https://doi.org/10.1142/S0218301321500105","url":null,"abstract":"Relying on previous results, that link entanglement entropy and parton distribution functions in deep inelastic scattering, and focusing on the small Bjorken scaling region we present here indicati...","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"49 1","pages":"2150010"},"PeriodicalIF":0.0,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74607339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A systematic study of alpha decay in actinide nuclei using modified generalized liquid drop model 用改进的广义液滴模型系统地研究了锕系原子核中的α衰变
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-02-24 DOI: 10.1142/S0218301321500130
H. Manjunatha, G. R. Sridhar, N. Sowmya, P. S. D. Gupta, H. Ramalingam
{"title":"A systematic study of alpha decay in actinide nuclei using modified generalized liquid drop model","authors":"H. Manjunatha, G. R. Sridhar, N. Sowmya, P. S. D. Gupta, H. Ramalingam","doi":"10.1142/S0218301321500130","DOIUrl":"https://doi.org/10.1142/S0218301321500130","url":null,"abstract":"The alpha decay half-lives of actinides within modified generalized liquid drop model (MGLDM) are investigated by the Wentzel–Kramers–Brillouin (WKB) barrier penetration probability. The potential ...","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"16 1","pages":"2150013"},"PeriodicalIF":0.0,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90065782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Impact of different hydrodynamical mass transfer approaches in the spontaneous fission of Cf isotopes 不同流体动力传质方式对Cf同位素自发裂变的影响
International Journal of Modern Physics E-nuclear Physics Pub Date : 2021-02-06 DOI: 10.1142/s0218301321500014
N. Virk, Raj Kumar, M. Sharma
{"title":"Impact of different hydrodynamical mass transfer approaches in the spontaneous fission of Cf isotopes","authors":"N. Virk, Raj Kumar, M. Sharma","doi":"10.1142/s0218301321500014","DOIUrl":"https://doi.org/10.1142/s0218301321500014","url":null,"abstract":"Theoretical possibilities for the spontaneous emission of fission fragments from 237−256Cf parents are investigated within the framework of preformed cluster decay model (PCM). The fragmentation po...","PeriodicalId":14032,"journal":{"name":"International Journal of Modern Physics E-nuclear Physics","volume":"37 1","pages":"2150001"},"PeriodicalIF":0.0,"publicationDate":"2021-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79971997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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