H. S. Lee

ORCID: 0000-0002-0444-8473
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About
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Research Areas
  • Particle physics theoretical and experimental studies
  • High-Energy Particle Collisions Research
  • Quantum Chromodynamics and Particle Interactions
  • Dark Matter and Cosmic Phenomena
  • Particle Detector Development and Performance
  • Neutrino Physics Research
  • Cosmology and Gravitation Theories
  • Radiation Detection and Scintillator Technologies
  • Astrophysics and Cosmic Phenomena
  • Atomic and Subatomic Physics Research
  • Computational Physics and Python Applications
  • Black Holes and Theoretical Physics
  • Semiconductor Quantum Structures and Devices
  • Advanced Semiconductor Detectors and Materials
  • Nuclear physics research studies
  • Petroleum Processing and Analysis
  • Diverse Approaches in Healthcare and Education Studies
  • Nuclear Physics and Applications
  • Medical Imaging Techniques and Applications
  • Advanced Radiotherapy Techniques
  • Enhanced Oil Recovery Techniques
  • Particle Accelerators and Free-Electron Lasers
  • Chalcogenide Semiconductor Thin Films
  • Structural Integrity and Reliability Analysis
  • Allergic Rhinitis and Sensitization

University of Science and Technology
2025

Institute for Basic Science
2016-2025

University of Liverpool
2024-2025

Seoul National University
2015-2024

Chonnam National University
2013-2024

Kangwon National University Hospital
2024

Sungkyunkwan University
2013-2024

Korea University of Science and Technology
2013-2024

Korea Institute of Radiological and Medical Sciences
2024

Korea Research Institute of Standards and Science
2023-2024

The cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\psi}(2S)$ between threshold and $\sqrt{s}=5.5\text{ }\text{ }\mathrm{GeV}$ is measured using $673\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data on off the $\ensuremath{\Upsilon}(4S)$ resonance collected with Belle detector at KEKB. Two resonant structures are observed in...

10.1103/physrevlett.99.142002 article EN Physical Review Letters 2007-10-01

We report new results from the neutrino elastic scattering observation with NaI (NEON) experiment in search for light dark matter (LDM) using 2636 kg·days of NaI(Tl) exposure. The employs an array crystals a total mass 16.7 kg, located 23.7 m away 2.8 GW thermal power nuclear reactor. investigated LDM produced by invisible decay photons, well-motivated mechanism generated high-flux photons during reactor operation. energy spectra collected reactor-on and reactor-off periods were compared...

10.1103/physrevlett.134.021802 article EN cc-by Physical Review Letters 2025-01-14

The Korea Invisible Mass Search (KIMS) experiment presents new limits on the weakly interacting massive particle (WIMP)-nucleon cross section using data from an exposure of 3409 kg·d taken with low-background CsI(Tl) crystals at Yangyang Underground Laboratory. most stringent limit spin-dependent interaction for a pure proton case is obtained. DAMA signal region both spin-independent and interactions WIMP masses greater than 20 GeV/c2 excluded by single crystal scintillators.Received 3 April...

10.1103/physrevlett.99.091301 article EN Physical Review Letters 2007-08-28

Abstract Wax deposition in subsea pipelines is a significant economic issue the petroleum industry. A mathematical model has been developed to predict increase both deposit thickness and wax fraction of using fundamental analysis heat mass transfer for laminar turbulent flow conditions. It was found that precipitation oil competing phenomenon with deposition. Two existing approaches consider either no (the independent model) or instantaneous solubility result an overprediction...

10.1002/aic.12517 article EN AIChE Journal 2010-12-13

We report the observation of a new $D_{sJ}$ meson produced in $B^{+} \to \bar{D}^{0} D_{sJ} D^{0} K^{+}$. This state has mass $M=2708 \pm 9 ^{+11}_{-10} \rm{MeV}/{\it c}^{2}$, width $\Gamma = 108 23 ^{+36}_{-31} ~\rm{MeV}/ {\it c}^{2}$ and $1^{-}$ spin-parity. The results are based on an analysis 449 million $B\bar{B}$ events collected at $\Upsilon(4S)$ resonance with Belle detector KEKB asymmetric-energy $e^{+} e^{-}$ collider.

10.1103/physrevlett.100.092001 article EN Physical Review Letters 2008-03-06

Cross sections of 1n-removal reactions from the neutron-rich nucleus Mg37 on C and Pb targets parallel momentum distributions residues target have been measured at 240 MeV/nucleon. A combined analysis these distinct nuclear- Coulomb-dominated reaction data shows that ground state has a small 1n separation energy 0.22−0.09+0.12 MeV an appreciable p-wave neutron single-particle strength. These results confirm lies near edge "island inversion" sizable halo component, heaviest such system...

10.1103/physrevlett.112.242501 article EN Physical Review Letters 2014-06-18

In this Technical Design Report (TDR) we describe the LZ detector to be built at Sanford Underground Research Facility (SURF). The dark matter experiment is designed achieve sensitivity a WIMP-nucleon spin-independent cross section of three times ten negative forty-eighth square centimeters.

10.48550/arxiv.1703.09144 preprint EN other-oa arXiv (Cornell University) 2017-01-01

The Advanced Molybdenum-based Rare process Experiment (AMoRE) aims to search for neutrinoless double beta decay (0$\nu\beta\beta$) of $^{100}$Mo with $\sim$100 kg $^{100}$Mo-enriched molybdenum embedded in cryogenic detectors a dual heat and light readout. At the current, pilot stage AMoRE project we employ six calcium molybdate crystals total mass 1.9 kg, produced from $^{48}$Ca-depleted ($^{48\textrm{depl}}$Ca$^{100}$MoO$_4$). simultaneous detection heat(phonon) scintillation (photon)...

10.1140/epjc/s10052-019-7279-1 article EN cc-by The European Physical Journal C 2019-09-01

COSINE-100 is a direct detection dark matter experiment that aims to test DAMA/LIBRA's claim of discovery by searching for dark-matter-induced annual modulation signal with NaI(Tl) detectors. We present new constraints on the from dataset 2.82 yr livetime utilizing an active mass 61.3 kg total exposure 173 kg⋅yr. This result features improved event selection allows both lowering energy threshold 1 keV and more precise time-dependent background model. In 1–6 2–6 intervals, we observe best-fit...

10.1103/physrevd.106.052005 article EN cc-by Physical review. D/Physical review. D. 2022-09-14

Abstract Neutrino elastic scattering observation with NaI (NEON) is an experiment designed to detect neutrino-nucleus coherent using reactor electron antineutrinos. NEON based on array of six NaI(Tl) crystals a total mass 13.3 kg, located at the tendon gallery that 23.7 m away from core thermal power 2.8 GW in Hanbit nuclear complex. The installation detector was completed December 2020, and since May 2021, has acquired data full power. Based observed light yields approximately 22, number...

10.1140/epjc/s10052-023-11352-x article EN cc-by The European Physical Journal C 2023-03-17

Abstract AMoRE-II aims to search for neutrinoless double beta decay ( $$0\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>0</mml:mn> <mml:mi>ν</mml:mi> <mml:mi>β</mml:mi> </mml:mrow> </mml:math> ) with an array of 423 $$\hbox {Li}_2^{100}\hbox {MoO}_4$$ <mml:msubsup> <mml:mtext>Li</mml:mtext> <mml:mn>2</mml:mn> <mml:mn>100</mml:mn> </mml:msubsup> <mml:msub> <mml:mtext>MoO</mml:mtext> <mml:mn>4</mml:mn> </mml:msub> crystals operating in the cryogenic...

10.1140/epjc/s10052-024-13516-9 article EN cc-by The European Physical Journal C 2025-01-08

Highly paraffinic (or waxy) crude oil can cause significant problems in subsea pipelines due to wax–oil gel blockage resulting from the precipitation of wax components. Once pipeline occurs and flow ceases, cannot be restarted with original steady state operating pressure but instead requires significantly higher pressures restart flow. In order understand restarting phenomenon field pipelines, we have investigated breaking mechanism at various temperatures cooling rates using a model also...

10.1021/ef700212v article EN Energy & Fuels 2007-11-19

We present new constraints on dark matter interactions using 1.7 years of COSINE-100 data. The experiment, consisting 106 kg tallium-doped sodium iodide (NaI(Tl)) target material, is aimed at testing DAMA's claim observation the same NaI(Tl) detectors. Improved event selection requirements, a more precise understanding detector background and use larger data set considerably enhances sensitivity for detection. No signal consistent with interaction identified, rules out model-dependent...

10.1126/sciadv.abk2699 article EN cc-by-nc Science Advances 2021-11-10

We report on the search for weakly interacting massive particle (WIMP) dark matter candidates in galactic halo that interact with sodium and iodine nuclei COSINE-100 experiment produce energetic electrons accompany recoil via Migdal effect. The WIMP mass sensitivity of previous searches relied detection ionization signals produced by target recoiling from elastic WIMP-nucleus scattering was restricted to masses above $\sim$5 GeV/$c^2$ detectors' 1 keVee energy-electron-equivalent threshold....

10.1103/physrevd.105.042006 article EN cc-by Physical review. D/Physical review. D. 2022-02-22

Abstract The DAMA/LIBRA collaboration has reported the observation of an annual modulation in event rate that been attributed to dark matter interactions over last two decades. However, even though tremendous efforts detect similar were pursued, no definitive evidence observed corroborate signal. Many studies assuming various models have attempted reconcile DAMA/LIBRA’s signals and null results from other experiments, however clear conclusion can be drawn. Apart hypothesis, several examined...

10.1038/s41598-023-31688-4 article EN cc-by Scientific Reports 2023-03-22

Flow-based generative models are composed of invertible transformations between two random variables the same dimension. Therefore, flow-based cannot be adequately trained if dimension data distribution does not match that underlying target distribution. In this paper, we propose SoftFlow, a probabilistic framework for training normalizing flows on manifolds. To sidestep mismatch problem, SoftFlow estimates conditional perturbed input instead learning directly. We experimentally show can...

10.48550/arxiv.2006.04604 preprint EN other-oa arXiv (Cornell University) 2020-01-01

A flexible and bioactive scaffold for adipose tissue engineering was fabricated evaluated by dual nozzle three-dimensional printing. highly elastic poly (L-lactide-co-ε-caprolactone) (PLCL) copolymer, which acted as the main scaffolding, human derived decellularized extracellular matrix (dECM) hydrogels were used printing inks to form scaffolds. To prepare (3D) scaffolds, PLCL co-polymer printed with a hot melting extruder system while retaining its physical character, similar tissue, is...

10.3390/ijms22062886 article EN International Journal of Molecular Sciences 2021-03-12

Elastic scattering off nuclei in target detectors, involving interactions with dark matter and coherent elastic neutrino nuclear recoil <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mo>(</a:mo><a:mi>CE</a:mi><a:mi>ν</a:mi><a:mi>NS</a:mi><a:mo>)</a:mo></a:mrow></a:math>, results the deposition of low energy within nuclei, dissipating rapidly through a combination heat ionization. The primary loss mechanism for is heat, leading to consistently smaller measurable scintillation...

10.1103/physrevc.110.014614 article EN cc-by Physical review. C 2024-07-10

Abstract The AMoRE collaboration searches for neutrinoless double beta decay of $$^{100}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mrow/> <mml:mn>100</mml:mn> </mml:mmultiscripts> </mml:math> Mo using molybdate scintillating crystals via low temperature thermal calorimetric detection. early phases the experiment, AMoRE-pilot and AMoRE-I, have demonstrated competitive discovery potential. Presently, AMoRE-II featuring a large detector array with...

10.1140/epjc/s10052-024-13498-8 article EN cc-by The European Physical Journal C 2025-02-11

AMoRE searches for the neutrinoless double beta decay using 100 kg of enriched Mo100. Scintillating molybdate crystals coupled with a metallic magnetic calorimeter operate at milli-Kelvin temperatures to measure energy electrons emitted in decay. AMoRE-I is demonstrator full-scale AMoRE, operated Yangyang Underground Laboratory over two years. The exposure was 8.02 year (or 3.89 kgMo100 year), and total background rate near Q value 0.025±0.002 counts/keV/kg/year. We observed no indication...

10.1103/physrevlett.134.082501 article EN Physical Review Letters 2025-02-27
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