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We propose a simple scheme of degenerate spontaneous parametric down-conversion (SPDC) in nonlinear metasurfaces or photonic crystal slabs with quasi-guided modes. It employs a band crossing between P- and S-polarized quasi-guided mode…

光学 · 物理学 2023-11-17 Tetsuyuki Ochiai

In the rare physics events search, liquid and solid detector plays an important role. Its analysis is based on the detection of excess events over the expected background or on the detection of an annual event rate modulation. Germanium…

仪器与探测器 · 物理学 2021-03-18 Akash Pandey , D. Singh , V. Singh

High-purity germanium detectors are widely used in rare-event searches due to their excellent energy resolution and extremely high intrinsic (radio)purity. In experiments searching for neutrinoless double beta decay in $^{76}$Ge such as…

仪器与探测器 · 物理学 2026-05-14 Alex Biondi , Krzysztof Szczepaniec , Tomasz Mróz , Marcin Misiaszek , Grzegorz Zuzel

Nuclear reactors represent a promising neutrino source for CE$\nu$NS (coherent-elastic neutrino-nucleus scattering) searches. However, reactor sites also come with high ambient neutron flux. Neutron capture-induced nuclear recoils can…

高能物理 - 实验 · 物理学 2024-03-19 A. J. Biffl , A. Gevorgian , K. Harris , A. N. Villano

We have developed a numerical model for the temporal evolution of particle and photon spectra resulting from nonthermal processes at the shock fronts formed in merging clusters of galaxies. Fermi acceleration is approximated by injecting…

天体物理学 · 物理学 2009-11-07 Robert C. Berrington , Charles D. Dermer

Modern coaxial and planar HPGe detectors allow a precise determination of the energies and trajectories of the impinging gamma-rays. This entails the location of the gamma interactions inside the crystal from the shape of the delivered…

数据分析、统计与概率 · 物理学 2009-08-25 P. Desesquelles , T. M. H. Ha , K. Hauschild , A. Korichi , F. Le Blanc , A. Lopez-Martens , A. Olariu , C. M. Petrache

We report a novel correlated background in the antineutrino detection using the inverse beta decay reaction. Spontaneous fissions and $(\alpha,n)$ reactions in peripheral materials of the antineutrino detector, such as borosilicate glass of…

仪器与探测器 · 物理学 2021-12-01 Zhiyuan Chen , Xin Zhang , Zeyuan Yu , Jun Cao , Changgen Yang

Space charge accumulation within GEM holes is one of the vital phenomena which affects many of the key working parameters of the detector. This accumulation is found to be significantly affected by the initial primary charge configurations…

We present cosmological simulations of galaxy clusters, with focus on the cluster outskirts. We show that large-scale cosmic accretion and mergers produce significant internal gas motions and inhomogeneous gas distribution ("clumpiness") in…

宇宙学与河外天体物理 · 物理学 2011-01-10 Daisuke Nagai

Recent progress has been experienced in the field of hypernuclear weak decay, especially concerning the ratio of the neutron- to proton-induced Lambda non-mesonic decay rates, G_n/G_p. Theoretical analyses of nucleon coincidence data have…

核理论 · 物理学 2011-01-20 E. Bauer , G. Garbarino , A. Parreno , A. Ramos

We investigate the impact of shot noise on the stochastic gravitational wave background generated by binary neutron star mergers, and confirm that the overall background can be significantly influenced by relatively few neighboring, loud…

广义相对论与量子宇宙学 · 物理学 2026-02-06 Haowen Zhong , Vuk Mandic

Using analytical methods and Monte Carlo simulations, we analyze a new statistic designed to detect isolated step-like discontinuities which are coherent over large areas of Cosmic Microwave Background (CMB) pixel maps. Such coherent…

天体物理学 · 物理学 2007-05-23 Leandros Perivolaropoulos

We theoretically investigate detuning-dependent properties of high-order harmonic generation (HHG) in monolayer transition metal dichalcogenides (TMDCs). In contrast to HHG in conventional materials, TMDCs show both parallel and…

材料科学 · 物理学 2018-04-18 Tomohiro Tamaya , Satoru Konabe , Shiro Kawabata

A new technique of elucidating $\beta$-decay schemes of isotopes with large density of states at low excitation energies has been developed, in which a Broad Energy Germanium (BEGe) detector is used in conjunction with coaxial hyper-pure…

The SuperCDMS experiment in the Soudan Underground Laboratory searches for dark matter with a 9-kg array of cryogenic germanium detectors. Symmetric sensors on opposite sides measure both charge and phonons from each particle interaction,…

The stochastic gravitational-wave background (SGWB) produced by merging neutron stars exhibits a peak in the kHz band. In this paper, we develop a theoretical framework to exploit this distinctive feature through a Markov Chain Monte Carlo…

广义相对论与量子宇宙学 · 物理学 2024-04-04 Giulia Capurri , Andrea Lapi , Mario Spera , Carlo Baccigalupi

The highest-energy cosmic neutrino detected by the ARCA detector of KM3NeT has reignited the quest to pinpoint the sources of ultrahigh-energy cosmic rays (UHECRs; $E\gtrsim 0.1$ EeV). By uncovering the associated multimessenger signals, we…

高能天体物理现象 · 物理学 2026-01-15 Sovan Boxi , Saikat Das , Nayantara Gupta

We study how coherent scattering of a background gas off an atom (or other matter) interferometer can lead to enhanced signals from phase shifts and contrast loss. We focus on the inclusion of realistic features of atom interferometers such…

高能物理 - 唯象学 · 物理学 2025-09-18 Clara Murgui , Ryan Plestid

We propose a characterization tool for studies of the band structure of new materials promising for the observation of topological phase transitions. We show that a specific resonant feature in the entropy per electron dependence on the…

介观与纳米尺度物理 · 物理学 2018-05-29 D. Grassano , O. Pulci , V. O. Shubnyi , S. G. Sharapov , V. P. Gusynin , A. V. Kavokin , A. A. Varlamov
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