Article
Physics, Nuclear
X. Liu, P. Egelhof, O. Kiselev, M. Mutterer
Summary: The differential cross sections for elastic p-He-6 and p-He-8 scattering, measured at high momentum transfer up to the first diffraction minimum and around 700 MeV/u at GSI Darmstadt, were analyzed using the sum-of-Gaussians (SOG) method based on Glauber multiple-scattering theory. The rms point matter radii of He-6 and He-8 were deduced to be 2.29(6) fm and 2.53(7) fm, respectively, in close agreement with former analyses. The overall radial density distributions of He-6 and He-8 were precisely deduced, particularly at small radii, revealing a pronounced core rearrangement when adding valence neutrons to form He-6 and He-8.
Article
Multidisciplinary Sciences
Junki Tanaka, Zaihong Yang, Stefan Typel, Satoshi Adachi, Shiwei Bai, Patrik van Beek, Didier Beaumel, Yuki Fujikawa, Jiaxing Han, Sebastian Heil, Siwei Huang, Azusa Inoue, Ying Jiang, Marco Knosel, Nobuyuki Kobayashi, Yuki Kubota, Wei Liu, Jianling Lou, Yukie Maeda, Yohei Matsuda, Kenjiro Miki, Shoken Nakamura, Kazuyuki Ogata, Valerii Panin, Heiko Scheit, Fabia Schindler, Philipp Schrock, Dmytro Symochko, Atsushi Tamii, Tomohiro Uesaka, Vadim Wagner, Kazuki Yoshida, Juzo Zenihiro, Thomas Aumann
Summary: The study of alpha cluster formation on the surface of neutron-rich heavy nuclei using quasi-free alpha cluster-knockout reactions reveals a tight interplay with the neutron skin thickness. This result calls for a revision in the correlation between neutron-skin thickness and the density dependence of the symmetry energy, crucial for understanding neutron stars. Additionally, the observed monotonous decrease of reaction cross sections with increasing mass number provides a natural explanation for the origin of alpha particles in alpha decay.
Article
Physics, Nuclear
K. Uzawa, K. Hagino, K. Yoshida
Summary: Nuclear deformation is important in inducing the halo structure in neutron-rich nuclei, with axial and non-axial deformations affecting the mixing of single-particle wave functions. Triaxial deformation introduces the Omega quantum number, potentially leading to changes in the halo structure even when absent in axially symmetric deformation.
Article
Astronomy & Astrophysics
Dhruba Dutta Chowdhury, Frank C. van den Bosch, Pieter van Dokkum, Victor H. Robles, Hsi-Yu Schive, Tzihong Chiueh
Summary: The impact of fuzzy dark matter (FDM) on the structure and kinematics of spheroidal dwarf galaxies is studied through high-resolution numerical simulations. The results show that these galaxies continuously increase their sizes and central velocity dispersions, and their kinematic structures become strongly radially anisotropic. Dynamical heating also causes initially ellipsoidal galaxies to become more spherical over time and gives rise to distorted, nonconcentric isodensity contours. These characteristics can potentially be used to constrain the boson mass.
ASTROPHYSICAL JOURNAL
(2023)
Article
Physics, Nuclear
Zhen Wang, Dong Bai, Zhongzhou Ren
Summary: The improved version of the density-dependent cluster model (DDCM+), which accounts for the anisotropy and polarization effects of surface diffuseness due to nuclear deformation, is developed to optimize alpha-decay calculations. The systematic calculations on alpha-decay half-lives for 157 even-even nuclei show good agreement with experimental data and demonstrate the high reliability of the improved model.
Article
Physics, Nuclear
Cong Pan, Myung-Ki Cheoun, Yong-Beom Choi, Jianmin Dong, Xiaokai Du, Xiao-Hua Fan, Wei Gao, Lisheng Geng, Eunja Ha, Xiao-Tao He, Jinke Huang, Kun Huang, Seonghyun Kim, Youngman Kim, Chang-Hwan Lee, Jenny Lee, Zhipan Li, Zhi-Rui Liu, Yiming Ma, Jie Meng, Myeong-Hwan Mun, Zhongming Niu, Panagiota Papakonstantinou, Xinle Shang, Caiwan Shen, Guofang Shen, Wei Sun, Xiang-Xiang Sun, Jiawei Wu, Xinhui Wu, Xuewei Xia, Yijun Yan, To Chung Yiu, Kaiyuan Zhang, Shuangquan Zhang, Wei Zhang, Xiaoyan Zhang, Qiang Zhao, Ruyou Zheng, Shan-Gui Zhou
Summary: This paper extends the point-coupling DRHBc theory to odd -A and odd-odd nuclei and examines its applicability by calculating the ground-state properties of odd -A Nd isotopes. The results show good agreement with experimental data, paving the way for constructing a DRHBc mass table that includes all even-even, odd -A, and odd-odd nuclei in the nuclear chart.
Article
Physics, Nuclear
H. T. Fortune
Summary: Two separate analyses of E2 strengths in the first and second bands of Sm-154 show consistent results, indicating small mixing that decreases with increasing J values.
Article
Astronomy & Astrophysics
Saeed Fakhry, Javad T. Firouzjaee, Mehrdad Farhoudi
Summary: The study finds that the merger rate of PBHs within each halo is higher in ellipsoidal models compared to spherical models. The evolution of PBH total merger rate is more sensitive in ellipsoidal halo models than in spherical halo models, and the constraint on PBH abundance is potentially stronger in ellipsoidal-collapse halo models.
Article
Multidisciplinary Sciences
G. Guijarro, G. E. Astrakharchik, J. Boronat
Summary: The research team proposed a method to experimentally realize halo states containing as many as six atoms, observing the different responses of halo structures to interlayer separations and the unusual shape of halo states close to the unbinding threshold.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
Paul-Gerhard Reinhard, Xavier Roca-Maza, Witold Nazarewicz
Summary: The study focused on the parity-violating asymmetry A(PV) in Pb-208 using modern relativistic and nonrelativistic energy density functionals. By optimizing new functionals, predictions were made for the neutron skin thickness and symmetry-energy slope in Pb-208. The results were consistent with astrophysical data and differed from those obtained using a specific set of relativistic functionals.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Subinoy Das, Ethan O. Nadler
Summary: A small fraction of thermalized dark radiation transitioning into late-forming dark matter (LFDM) can suppress the growth of linear matter perturbations and leave oscillatory signatures on small scales. By using the Milky Way satellite galaxy population model, researchers have determined that dark matter created by this transition must form no later than one week after the big bang.
Article
Physics, Multidisciplinary
E. O. Nadler, A. Drlica-Wagner, K. Bechtol, S. Mau, R. H. Wechsler, V Gluscevic, K. Boddy, A. B. Pace, T. S. Li, M. McNanna, A. H. Riley, J. Garcia-Bellido, Y-Y Mao, G. Green, D. L. Burke, A. Peter, B. Jain, T. M. C. Abbott, M. Aguena, S. Allam, J. Annis, S. Avila, D. Brooks, M. Carrasco Kind, J. Carretero, M. Costanzi, L. N. da Costa, J. De Vicente, S. Desai, H. T. Diehl, P. Doel, S. Everett, A. E. Evrard, B. Flaugher, J. Frieman, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, S. R. Hinton, K. Honscheid, D. Huterer, D. J. James, E. Krause, K. Kuehn, N. Kuropatkin, O. Lahav, M. A. G. Maia, J. L. Marshall, F. Menanteau, R. Miquel, A. Palmese, F. Paz-Chinchon, A. A. Plazas, A. K. Romer, E. Sanchez, V Scarpine, S. Serrano, I Sevilla-Noarbe, M. Smith, M. Soares-Santos, E. Suchyta, M. E. C. Swanson, G. Tarle, D. L. Tucker, A. R. Walker, W. Wester
Summary: The study on Milky Way satellite galaxies provides strong cosmological constraints on various particle models of dark matter, supporting the cold, collisionless dark matter paradigm. Limits are reported on the mass of thermal relic warm dark matter, velocity-independent dark matter-proton scattering cross section, and the mass of fuzzy dark matter, complementing other observational and laboratory constraints on dark matter properties.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
R. Sparta, A. Di Pietro, P. Figuera, O. Tengblad, A. M. Moro, I. Martel, J. P. Fernandez-Garcia, Jin Lei, L. Acosta, M. J. G. Borge, G. Bruni, J. Cederkall, T. Davinson, J. D. Ovejas, L. M. Fraile, D. Galaviz, J. Halkjaer Jensen, B. Jonson, M. La Cognata, A. Perea, A. M. Sanchez-Benitez, N. Soic, S. Vinals
Summary: The proton halo effects in the B-8+Zn-64 reaction at an energy around 1.5 times the Coulomb barrier were studied. The results show that the collision dynamics of B-8 at the barrier is very different from neutron halo nuclei, with only modest effects of coupling to continuum.
Article
Materials Science, Multidisciplinary
Shingo Tagami, Tomotsugu Wakasa, Masanobu Yahiro
Summary: This study reported a new skin value and determined the skin thickness and matter radii through experimental evidence. The results showed that the skin value was 0.512±0.268 fm, and the matter radii based on different scattering reactions were 3.734±0.091 fm, 3.709±0.098 fm, 3.753±0.112 fm, and 3.822±0.142 fm.
RESULTS IN PHYSICS
(2023)
Review
Astronomy & Astrophysics
Lam Hui
Summary: This paper reviews the physics and phenomenology of wave dark matter, outlining its particle physics motivations and rich phenomenology. Wave interference in dark matter leads to unique structures like vortices and solitons, with potential implications for observed astronomical phenomena. Detection experiments and theoretical predictions for wave dark matter are discussed, highlighting the importance of understanding the stochastic nature of waves in interpreting constraints and measurements.
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 59
(2021)
