HNPS Advances in Nuclear Physics最新文献_第4页

Universal relations and finite temperature neutron stars 宇宙关系与有限温度中子星

HNPS Advances in Nuclear Physics Pub Date : 2023-05-05 DOI: 10.12681/hnpsanp.5098

P. Laskos-Patkos, P. Koliogiannis, A. Kanakis-Pegios, C. Moustakidis

{"title":"Universal relations and finite temperature neutron stars","authors":"P. Laskos-Patkos, P. Koliogiannis, A. Kanakis-Pegios, C. Moustakidis","doi":"10.12681/hnpsanp.5098","DOIUrl":"https://doi.org/10.12681/hnpsanp.5098","url":null,"abstract":"In the past few years, a lot of studies devoted to the discovery of universal relations (equation of state independent relations). The significance of such expressions can be understood if we consider that they offer the opportunity for testing general relativity in a way that is independent of the nuclear equation of state and they also allow us to impose constraints on the structure of neutron stars. The aim of this work is twofold. Firstly, we wish to clarify if hot equations of state are able to reproduce established universal relations. Secondly, we investigate a possible universal connection between the binding energy and the dimensionless tidal deformability of a neutron star. These two bulk properties are associated with two very important candidates for multimessenger signals, binary neutron star mergers and supernova explosions. We find that the predictions of hot equations of state do not agree with the predictions from accepted universal relations. Subsequently, the use of universal relations, when thermal effects are present, may be erroneous. Additionally, we find that, for moderate neutron star masses, the binding energy and the dimensionless tidal deformability of a neutron star satisfy a universal relation. The latter allows us to impose constraints on the binding energy of 1.4 Msun neutron star, using information from the analysis of the GW170817 event. Finally, we are able to present a universal relation between the compactness, the binding energy and the dimensionless tidal deformability, which is independent of the employed equation of state for zero and finite temperature.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134623972","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

Characterization of a Novel CdZnTe Spectrometer for Measuring Radioactivity in the Marine Environment 测量海洋环境放射性的新型CdZnTe光谱仪的表征

HNPS Advances in Nuclear Physics Pub Date : 2023-05-05 DOI: 10.12681/hnpsanp.5096

G. Siltzovalis, V. Lagaki, I. Madesis, T. Mertzimekis

引用次数: 0

Nuclear power as part of the Greek energy mix: Far better to be cost effectively proactive than unconditionally inactive 核能作为希腊能源结构的一部分:积极采取经济有效的措施远比无条件不采取行动要好

HNPS Advances in Nuclear Physics Pub Date : 2023-05-05 DOI: 10.12681/hnpsanp.5134

N. Petropoulos, D. Mitrakos

{"title":"Nuclear power as part of the Greek energy mix: Far better to be cost effectively proactive than unconditionally inactive","authors":"N. Petropoulos, D. Mitrakos","doi":"10.12681/hnpsanp.5134","DOIUrl":"https://doi.org/10.12681/hnpsanp.5134","url":null,"abstract":"This position paper advocates preparatory actions for the incorporation of fission energy into the Greek mix, should this be necessary within the foreseeable future. To this end, and first of all, a concise understanding of the current Greek energy mix and its perspectives is essential in connection to the potential problems due to the expansion of renewable energy. Present and future inefficiencies could be avoided to a manageable extend, mainly by energy savings, mostly applicable for buildings consumption and also by upgrades towards a much denser grid, capable of reversing flows, along with energy storage facilities. In parallel, an assessment of the introduction potential of nuclear power could be examined. The assessment could involve political parties, scientists and other stakeholders, pro and against, and might reasonably result to justified arguments capable of raising public awareness. The country's preparedness to go nuclear could depend more or less on the degree of local energy market regulation framework, on the local and broader investment and financial environment, on the power plant construction and operation insurance possibilities, on the review and introduction of applicable law for licensing and regulating nuclear power and on the local scientific potential in the nuclear engineering field. Parameters like construction of related major engineering parts locally should also be examined along with compensatory benefits to the domestic economy and the local societies in the vicinity of the reactor sites. It is proposed that this work could be accomplished by an adequate task force without particular costs and within reasonable time.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114887229","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

Investigating the possible existence of hyper-heavy nuclei in a neutron-star environment 研究中子星环境中可能存在的超重核

HNPS Advances in Nuclear Physics Pub Date : 2023-05-03 DOI: 10.12681/hnpsanp.5080

Charalampos Moustakidis

引用次数: 0

Radiation Emission and Absorption by Astrophysical Jets from XRBs XRBs天体物理喷流的辐射发射和吸收

HNPS Advances in Nuclear Physics Pub Date : 2023-05-03 DOI: 10.12681/hnpsanp.4890

T. Papavasileiou, O. Kosmas, Ioannis Sinatkas

引用次数: 0

Elastic scattering measurements of 7Be+natZr at sub- and near – barrier energies 亚势垒和近势垒能下7Be+natZr的弹性散射测量

HNPS Advances in Nuclear Physics Pub Date : 2023-05-03 DOI: 10.12681/hnpsanp.5006

A. Pakou

引用次数: 0

True coincidence summing corrections in HPGe detectors 高能锗探测器的真巧合和修正

HNPS Advances in Nuclear Physics Pub Date : 2023-04-26 DOI: 10.12681/hnpsanp.5187

Anastasia Milioni, T. Vasilopoulou, M. Savva, M. Anagnostakis, I. Stamatelatos

{"title":"True coincidence summing corrections in HPGe detectors","authors":"Anastasia Milioni, T. Vasilopoulou, M. Savva, M. Anagnostakis, I. Stamatelatos","doi":"10.12681/hnpsanp.5187","DOIUrl":"https://doi.org/10.12681/hnpsanp.5187","url":null,"abstract":"The true coincidence effect is studied in two High Purity Germanium (HPGe) detectors for a variety of isotopes, source geometries and source to detector configurations, via computational tools based on Monte–Carlo simulations. Τhe upgraded patch of MCNP code MCNP–CP and the 2018 version of PENELOPE, which take into account the decay scheme of each cascade emitter, are used to calculate the Full Energy Peak Efficiency (FEPE) for the corresponding gamma-ray energies. The true coincidence correction (TCC) factor is calculated as the ratio of the FEPE derived for each nuclide taking into consideration the true coincidence effect, to the FEPE estimated without considering the phenomenon. In all cases, a satisfactory agreement is observed between the TCC factors calculated using MCNP–CP and PENELOPE 2018. Moreover, the results of the calculations are compared against experimentally derived efficiency values. The correction factors obtained using the TrueCoinc software are applied on experimentally determined FEPE curves, based on measurements performed using reference sources, and consequently the corrected data are compared against the simulations for the \"non-coincidence\" case. The results of this work contribute to the validation of the computational tools and codes used to study the true coincidence effect and determine the corresponding correction factors, providing useful data for gamma–spectrometry studies of cascade emitters.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"57 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133350456","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

Charged particles’ detection at n_TOF/CERN: The new annular Double-Sided Silicon Strip Detector n_TOF/CERN的带电粒子探测:新型环形双面硅条探测器

HNPS Advances in Nuclear Physics Pub Date : 2023-04-26 DOI: 10.12681/hnpsanp.5216

Styliani Goula

引用次数: 0

Recent upgrades at the Tandem Laboratory of NCSR “Demokritos” NCSR“Demokritos”串联实验室的最新升级

HNPS Advances in Nuclear Physics Pub Date : 2023-04-26 DOI: 10.12681/hnpsanp.5226

A. Lagoyannis, M. Andrianis, M. Axiotis, Prodromos Chatzispyroglou, S. Harissopulos, Aggelos Laoutaris, I. Stamatelatos, Tryfon Tsiamis

引用次数: 0

Thermochronometry of metamorphic rock complexes on the SE Peloponnese, Greece, using thermoluminescence (TL): preliminary experiments 希腊伯罗奔尼撒半岛东南部变质岩杂岩的热释光测定:初步实验

HNPS Advances in Nuclear Physics Pub Date : 2022-12-13 DOI: 10.12681/hnpsanp.5135

Vasiliki Κ. Kanavou, C. Athanassas, K. Stamoulis, X. Aslanoglou, V. Mouslopoulou

{"title":"Thermochronometry of metamorphic rock complexes on the SE Peloponnese, Greece, using thermoluminescence (TL): preliminary experiments","authors":"Vasiliki Κ. Kanavou, C. Athanassas, K. Stamoulis, X. Aslanoglou, V. Mouslopoulou","doi":"10.12681/hnpsanp.5135","DOIUrl":"https://doi.org/10.12681/hnpsanp.5135","url":null,"abstract":"Here, we report preliminary results from thermoluminescence (TL) measurements on metamorphic quartz from the SE Peloponnese, Greece, and we discuss its potential for thermometric and, possibly, thermochronometric applications over longer geological periods. Extensive high pressure/low temperature (HP/LT) schists associated with a 24 Ma metamorphic age, and with cooling ages ranging between 6-14 Ma (based on fission-track and (U-Th)/He thermochronometry), encompass sizable quartzite outcrops associated with substantially low radiation (U, Th, K concentrations below the analytical detection limits), allowing TL signal to grow on longer geological timescales. Although deeper TL traps (>360°C) appeared saturated as expected, geologically stable traps lying between around 360°C were found to be far from saturation. Once higher analytical resolution is achieved in the determination of the radioelement concentrations the recovered equivalent doses will be combined with the respective dose rates to explore the suitability of TL from quartz for longer-range thermochronometry in extremely low-radiation geological environments.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129535555","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