arXiv: Nuclear Experiment最新文献_第5页

Evolution of the N=20 and 28 shell gaps and two-particle-two-hole states in the FSU interaction FSU相互作用中N=20和28壳隙和双粒子-双空穴态的演化

arXiv: Nuclear Experiment Pub Date : 2020-02-05 DOI: 10.1103/physrevresearch.2.043342

R. Lubna, K. Kravvaris, K. Kravvaris, S. Tabor, V. Tripathi, E. Rubino, A. Volya

{"title":"Evolution of the \u0000N=20\u0000 and 28 shell gaps and two-particle-two-hole states in the FSU interaction","authors":"R. Lubna, K. Kravvaris, K. Kravvaris, S. Tabor, V. Tripathi, E. Rubino, A. Volya","doi":"10.1103/physrevresearch.2.043342","DOIUrl":"https://doi.org/10.1103/physrevresearch.2.043342","url":null,"abstract":"The FSU $spsdfp$ cross-shell interaction for the shell model was successfully fitted to a wide range of mostly intruder negative parity states of the $sd$ shell nuclei. This paper reports the application of the FSU interaction to systematically trace out the relative positions of the effective single-particle energies of the $0f_{7/2}$ and $1p_{3/2}$ orbitals, the evolution from normally ordered low-lying states to the \"Island of Inversion\" (IoI), and the behavior of a wide range of excited states with a $0f_{7/2}$ proton and neutron coupled to maximum spin of $7 hbar$. Above a proton number of about 13 the $0f_{7/2}$ orbital lies below that of $1p_{3/2}$, which is considered normal ordering, but systematically at $Z = 10$ to $12$ the orbitals cross. The calculations reproduce well the 2p2h - 0p0h inversion in the configurations of nuclei inside the IoI, they reproduce the absolute binding energies and the transition to normal ordering as the proton number approaches that of the neutrons. The important role of $1p_{3/2}$ neutron pairs in the IoI is also demonstrated. The calculations account well for the energies of the fully aligned states with 0, 1, or 2 individual $sd$ nucleon aligned in spin with the aligned $pi 0f_{7/2}$ - $nu 0f_{7/2}$ pair and reproduce well their systematic variation with $A$ and number of aligned $sd$ nucleons. The results presented in this paper give hope for the predictive power of the FSU interaction for more exotic nuclei to be explored in near future.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85137512","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

Z production in pPb collisions and charmonium production in PbPb ultra-peripheral collisions at LHCb LHCb中pPb碰撞产生的Z和PbPb超外围碰撞产生的谐波

arXiv: Nuclear Experiment Pub Date : 2020-02-05 DOI: 10.1016/j.nuclphysa.2020.121902

Hengne Li

引用次数: 3

Two-Pion Intensity Interferometry in Au+Au @ 1.23A GeV Au+Au @ 1.23A GeV中的双介子强度干涉测量

arXiv: Nuclear Experiment Pub Date : 2020-01-31 DOI: 10.1016/j.nuclphysa.2020.121816

R. Greifenhagen

引用次数: 0

Studies of Strange and Non-Strange Beauty Productions in PbPb Collisions with the CMS Detector 用CMS探测器研究PbPb碰撞产生的奇异和非奇异美

arXiv: Nuclear Experiment Pub Date : 2020-01-28 DOI: 10.1016/j.nuclphysa.2020.121805

Z. Shi

引用次数: 0

Exclusive Hard Processes for Studying Hadron Structures at J-PARC 在J-PARC研究强子结构的独家硬过程

arXiv: Nuclear Experiment Pub Date : 2019-12-26 DOI: 10.7566/JPSCP.33.011107

Wen-Chen Chang

引用次数: 0

Survey of deformation in nuclei in order to estimate the enhancement of sensitivity to atomic EDM 研究原子核的变形，以估计对原子电火花加工的灵敏度增强

arXiv: Nuclear Experiment Pub Date : 2019-12-19 DOI: 10.1063/5.0008560

P. Mohanmurthy, U. Silwal, D. Siwakoti, J. Winger

{"title":"Survey of deformation in nuclei in order to estimate the enhancement of sensitivity to atomic EDM","authors":"P. Mohanmurthy, U. Silwal, D. Siwakoti, J. Winger","doi":"10.1063/5.0008560","DOIUrl":"https://doi.org/10.1063/5.0008560","url":null,"abstract":"The observed baryon asymmetry of the universe (BAU) cannot be explained by the known sources of charge-parity (CP)-violation in the Standard Model (SM). A non-zero permanent electric-dipole-moment (EDM) for fundamental particles, nuclei or atoms, violates CP. Measuring a non-zero EDM allows us to gain a handle on additional sources of CP-violation required to explain the observed BAU. The EDM of an atom with an octupole and quadrupole deformed nucleus is enhanced. Therefore, the search for such atoms has become important in the quest to measure an EDM. Viability of EDM searches in $^{225}$Ra atoms with a deformed nucleus have already been demonstrated. We have performed a comprehensive survey for possible EDM candidates from a list of octupole deformed nuclei predicted by various theoretical models. Our search of long-lived isotopes with nuclear deformations comparable to or better than $^{225}$Ra results in a handful of viable candidates for future atomic EDM experiments based out of the Facility for Rare Isotope Beams (FRIB): $^{221}$Rn, $^{221,223,227}$Fr, $^{221,223,225}$Ra, $^{223,225,227}$Ac, $^{229}$Th, and particularly $^{229}$Pa. Furthermore, nuclei of $^{223,225}$Rn, $^{225}$Fr and $^{226}$Ac are also highly quadrupole and octupole deformed, but their ground state parity doublet energy difference has not yet been measured.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74562936","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

Equilibrium constants of hydrogen and helium isotopes at low nuclear densities 低核密度下氢和氦同位素的平衡常数

arXiv: Nuclear Experiment Pub Date : 2019-11-19 DOI: 10.1088/1361-6471/ab56ba

R. Bougault, E. Bonnet, B. Borderie, A. Chbihi, J. Frankland, E. Galichet, D. Gruyer, M. Henri, M. Commara, N. Neindre, I. Lombardo, O. Lopez, L. Manduci, M. Pârlog, R. Roy, G. Verde, M. Vigilante

引用次数: 11

High-resolution study of excited states in Gd158 with the (p, t) reaction Gd158中(p, t)反应激发态的高分辨率研究

arXiv: Nuclear Experiment Pub Date : 2019-11-14 DOI: 10.1103/physrevc.102.014308

A. Levon, D. Bucurescu, C. Costache, T. Faestermann, R. Hertenberger, A. Ionescu, R. Lica, A. Magner, C. Mihai, R. Mihai, C. Nita, S. Pascu, K. P. Shevchenko, A. Shevchuk, A. Turturica, H. Wirth

{"title":"High-resolution study of excited states in \u0000Gd158\u0000 with the \u0000(p, t)\u0000 reaction","authors":"A. Levon, D. Bucurescu, C. Costache, T. Faestermann, R. Hertenberger, A. Ionescu, R. Lica, A. Magner, C. Mihai, R. Mihai, C. Nita, S. Pascu, K. P. Shevchenko, A. Shevchuk, A. Turturica, H. Wirth","doi":"10.1103/physrevc.102.014308","DOIUrl":"https://doi.org/10.1103/physrevc.102.014308","url":null,"abstract":"The excitation spectra in the deformed nucleus 158Gd have been studied with high energy resolution by means of the (p,t) reaction using the Q3D spectrograph facility at the Munich Tandem accelerator. The angular distributions of tritons were measured for more than 200 excited states seen in the triton spectra up to 4.3 MeV. A number of 36 excited 0+ states (five tentative), have been assigned by comparison of experimental angular distributions with the calculated ones using the CHUCK code. Assignments for levels with higher spins are the following: 95 for 2+ states, 64 for 4+ states, 14 for 6+ states and about 20 for negative parity states. Sequences of states which can be treated as rotational bands are selected. The analysis of the moments of inertia defined for these bands is carried out. This high number of excited states in a deformed nucleus, close to a complete level scheme, constitutes a very good ground to check models of nuclear structure. The large ensembles of states with the same spin-parity offer unique opportunities for statistical analysis. Such an analysis for the 0+, 2+ and 4+ states sequences, for all K-values and for well-determined projections K of the angular momentum is performed. The obtained data may indicate on a K symmetry breaking. Experimental data are compared with interacting boson model (IBM) calculations using the spdf version of the model. The energies of the low-lying levels, the transition probabilities in the first bands and the distribution in transfer intensity of the 0+ states are calculated and compared with experiment.","PeriodicalId":8464,"journal":{"name":"arXiv: Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86124627","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

Probing QCD Matter via $$K^{*0}(892)$$ and $$phi (1020)$$ Resonance Production at RHIC 在RHIC通过$$K^{*0}(892)$$和$$phi (1020)$$共振产生探测QCD物质

arXiv: Nuclear Experiment Pub Date : 2019-11-06 DOI: 10.1007/978-3-030-53448-6_51

M. Nasim

引用次数: 1

Search for the $N$(1685) in $etapi$-Photoproduction 在$etapi$-Photoproduction中搜索$N$(1685)

arXiv: Nuclear Experiment Pub Date : 2019-11-05 DOI: 10.1051/EPJCONF/202024101019

D. Werthmüller

引用次数: 1