S. K. Kim
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
S. K. Kim has a total of 78 co-authors. Here are the top co-authors by number of shared publications:
Y. D. Kim
Center for Underground Physics Institute for Basic Science (IBS) 34126 Daejeon Korea
4 shared publications- Yong-Hamb Kim
Institute for Basic Science (IBS)
4 shared publications C. S. Kang
Center for Underground Physics Institute for Basic Science (IBS) 34126 Daejeon Republic of Korea
3 shared publicationsD. H. Kwon
Center for Underground Physics Institute for Basic Science (IBS) 34126 Daejeon Republic of Korea
3 shared publicationsH. J. Lee
Center for Underground Physics Institute for Basic Science (IBS) 34126 Daejeon Republic of Korea
3 shared publicationsH. S. Lee
Center for Underground Physics Institute for Basic Science (IBS) 34126 Daejeon Korea
3 shared publications
Latest Publications
- Open Access
LiFE-SNS: LiF Experiment for keV-scale Sterile Neutrino Search
The LiF Experiment for keV-scale Sterile Neutrino Search (LiFE-SNS) aims to probe sterile neutrinos through precision measurements of the tritium $β$ spectrum. Tritium nuclei are produced and embedded in LiF crystals via the ${}^{6}\mathrm{Li}(n,α){}^{3}\mathrm{H}$ reaction, allowing thermal calorimetric detection of $β$ decays with magnetic microcalorimeters (MMCs) operated at millikelvin temperatures. We present the detector configuration, background studies, and calibration method, including modeling of position-dependent response and characterization of detector nonlinearity. We also discuss potential sources of systematic uncertainty relevant to the sterile-neutrino search. While the first phase of LiFE-SNS has been completed, this paper focuses on calibration and detector characterization. The achieved performance enables precision $β$-spectrum measurements, and projected sensitivities indicate competitive reach in the keV mass region.Open AccessLiFE-SNS: LiF Experiment for keV-scale Sterile Neutrino Search
The LiF Experiment for keV-scale Sterile Neutrino Search (LiFE-SNS) aims to probe sterile neutrinos through precision measurements of the tritium $β$ spectrum. Tritium nuclei are produced and embedded in LiF crystals via the ${}^{6}\mathrm{Li}(n,α){}^{3}\mathrm{H}$ reaction, allowing thermal calorimetric detection of $β$ decays with magnetic microcalorimeters (MMCs) operated at millikelvin temperatures. We present the detector configuration, background studies, and calibration method, including modeling of position-dependent response and characterization of detector nonlinearity. We also discuss potential sources of systematic uncertainty relevant to the sterile-neutrino search. While the first phase of LiFE-SNS has been completed, this paper focuses on calibration and detector characterization. The achieved performance enables precision $β$-spectrum measurements, and projected sensitivities indicate competitive reach in the keV mass region. - Open Access
Status and performance of the AMoRE-I experiment on neutrinoless double beta decay
AMoRE is an international project to search for the neutrinoless double beta decay of $^{100}$Mo using a detection technology consisting of magnetic microcalorimeters (MMCs) and molybdenum-based scintillating crystals. Data collection has begun for the current AMORE-I phase of the project, an upgrade from the previous pilot phase. AMoRE-I employs thirteen $^\mathrm{48depl.}$Ca$^{100}$MoO$_4$ crystals and five Li$_2$$^{100}$MoO$_4$ crystals for a total crystal mass of 6.2 kg. Each detector module contains a scintillating crystal with two MMC channels for heat and light detection. We report the present status of the experiment and the performance of the detector modules.Open AccessStatus and performance of the AMoRE-I experiment on neutrinoless double beta decay
AMoRE is an international project to search for the neutrinoless double beta decay of $^{100}$Mo using a detection technology consisting of magnetic microcalorimeters (MMCs) and molybdenum-based scintillating crystals. Data collection has begun for the current AMORE-I phase of the project, an upgrade from the previous pilot phase. AMoRE-I employs thirteen $^\mathrm{48depl.}$Ca$^{100}$MoO$_4$ crystals and five Li$_2$$^{100}$MoO$_4$ crystals for a total crystal mass of 6.2 kg. Each detector module contains a scintillating crystal with two MMC channels for heat and light detection. We report the present status of the experiment and the performance of the detector modules. - Open Access
- 21 October 2022
- Published by Springer Nature in Journal of Low Temperature Physics
- Vol. 209 (5-6) , 962-970
Status and Performance of the AMoRE-I Experiment on Neutrinoless Double Beta Decay
AMoRE is an international project to search for the neutrinoless double beta decay of $$^{100}\hbox {Mo}$$ using a detection technology consisting of magnetic microcalorimeters (MMCs) and molybdenum-based scintillating crystals. Data collection has begun for the current AMORE-I phase of the project, an upgrade from the previous pilot phase. AMoRE-I employs thirteen $${}^\mathrm {48depl.}\hbox {Ca}^{100}\hbox {MoO}_4$$ crystals and five $$\hbox {Li}_2^{100}\hbox {MoO}_4$$ crystals for a total crystal mass of 6.2 kg. Each detector module contains a scintillating crystal with two MMC channels for heat and light detection. We report the present status of the experiment and the performance of the detector modules.- 21 October 2022
- Published by Springer Nature in Journal of Low Temperature Physics
- Vol. 209 (5-6) , 962-970
Open AccessStatus and Performance of the AMoRE-I Experiment on Neutrinoless Double Beta Decay
AMoRE is an international project to search for the neutrinoless double beta decay of $$^{100}\hbox {Mo}$$ using a detection technology consisting of magnetic microcalorimeters (MMCs) and molybdenum-based scintillating crystals. Data collection has begun for the current AMORE-I phase of the project, an upgrade from the previous pilot phase. AMoRE-I employs thirteen $${}^\mathrm {48depl.}\hbox {Ca}^{100}\hbox {MoO}_4$$ crystals and five $$\hbox {Li}_2^{100}\hbox {MoO}_4$$ crystals for a total crystal mass of 6.2 kg. Each detector module contains a scintillating crystal with two MMC channels for heat and light detection. We report the present status of the experiment and the performance of the detector modules. - Open Access
- 26 September 2022
- Published by Springer Nature in Journal of Low Temperature Physics
- Vol. 209 (5-6) , 919-926
A Lab-Scale Experiment for keV Sterile Neutrino Search
We developed a simple small-scale experiment to measure the beta decay spectrum of $$^{3}$$ H. The aim of this research is to investigate the presence of sterile neutrinos in the keV region. Tritium nuclei were embedded in a 1 $$\times$$ 1 $$\times$$ 1 cm $$^3$$ LiF crystal from the $$^6$$ Li(n, $$\alpha$$ ) $$^3$$ H reaction. The energy of the beta electrons absorbed in the LiF crystal was measured with a magnetic microcalorimeter at 40 mK. We report a new method of sample preparation, experiments, and analysis of $$^3$$ H beta measurements. The spectrum of a 10-hour measurement agrees well with the expected spectrum of $$^3$$ H beta decay. The analysis results indicate that this method can be used to search for keV-scale sterile neutrinos.- 26 September 2022
- Published by Springer Nature in Journal of Low Temperature Physics
- Vol. 209 (5-6) , 919-926
Open AccessA Lab-Scale Experiment for keV Sterile Neutrino Search
We developed a simple small-scale experiment to measure the beta decay spectrum of $$^{3}$$ H. The aim of this research is to investigate the presence of sterile neutrinos in the keV region. Tritium nuclei were embedded in a 1 $$\times$$ 1 $$\times$$ 1 cm $$^3$$ LiF crystal from the $$^6$$ Li(n, $$\alpha$$ ) $$^3$$ H reaction. The energy of the beta electrons absorbed in the LiF crystal was measured with a magnetic microcalorimeter at 40 mK. We report a new method of sample preparation, experiments, and analysis of $$^3$$ H beta measurements. The spectrum of a 10-hour measurement agrees well with the expected spectrum of $$^3$$ H beta decay. The analysis results indicate that this method can be used to search for keV-scale sterile neutrinos. - Open Access
Limits on Interactions between Weakly Interacting Massive Particles and Nucleons Obtained with NaI(Tl) crystal Detectors
Limits on the cross section for weakly interacting massive particles (WIMPs) scattering off nucleons in the NaI(Tl) detectors at the Yangyang Underground Laboratory are obtained with a 2967.4 kg*day data exposure. Nuclei recoiling are identified by the pulse shape of scintillating photon signals. Data are consistent with no nuclear recoil hypothesis, and 90% confidence level upper limits are set. These limits partially exclude the DAMA/LIBRA region of WIMP-sodium interaction with the same NaI(Tl) target detector. This 90% confidence level upper limit on WIMP-nucleon spin-independent cross section is 3.26*10^-4 pb for a WIMP mass at 10 GeV/c^2.
Open AccessLimits on Interactions between Weakly Interacting Massive Particles and Nucleons Obtained with NaI(Tl) crystal Detectors
Limits on the cross section for weakly interacting massive particles (WIMPs) scattering off nucleons in the NaI(Tl) detectors at the Yangyang Underground Laboratory are obtained with a 2967.4 kg*day data exposure. Nuclei recoiling are identified by the pulse shape of scintillating photon signals. Data are consistent with no nuclear recoil hypothesis, and 90% confidence level upper limits are set. These limits partially exclude the DAMA/LIBRA region of WIMP-sodium interaction with the same NaI(Tl) target detector. This 90% confidence level upper limit on WIMP-nucleon spin-independent cross section is 3.26*10^-4 pb for a WIMP mass at 10 GeV/c^2.
- Open Access
Quenching factor measurement for NaI(Tl) scintillation crystal
Scintillation crystals are commonly used for direct detection of weakly interacting massive particles (WIMPs), which are suitable candidates for a particle dark matter. It is well known that the scintillation light yields are different for electron recoil and nuclear recoil. To calibrate the energies of WIMP-induced nuclear recoil signals, the quenching factor (QF) needs to be measured, which is the light yield ratio of the nuclear recoil to electron recoil. Measurements of the QFs for Na and I recoils in a small (2 cm x 2 cm x 1.5 cm) NaI(Tl) crystal are performed with 2.43-MeV mono-energetic neutrons generated by deuteron-deuteron fusion. Depending on the scattering angle of the neutrons, the energies of the recoiled ions vary in the range of 9 - 152 keV for Na and 19 - 75 keV for I. The QFs of Na are measured at 9 points with values in the range of 10 - 23 % while those of I are measured at 4 points with values in the range of 4 - 6 %.
Open AccessQuenching factor measurement for NaI(Tl) scintillation crystal
Scintillation crystals are commonly used for direct detection of weakly interacting massive particles (WIMPs), which are suitable candidates for a particle dark matter. It is well known that the scintillation light yields are different for electron recoil and nuclear recoil. To calibrate the energies of WIMP-induced nuclear recoil signals, the quenching factor (QF) needs to be measured, which is the light yield ratio of the nuclear recoil to electron recoil. Measurements of the QFs for Na and I recoils in a small (2 cm x 2 cm x 1.5 cm) NaI(Tl) crystal are performed with 2.43-MeV mono-energetic neutrons generated by deuteron-deuteron fusion. Depending on the scattering angle of the neutrons, the energies of the recoiled ions vary in the range of 9 - 152 keV for Na and 19 - 75 keV for I. The QFs of Na are measured at 9 points with values in the range of 10 - 23 % while those of I are measured at 4 points with values in the range of 4 - 6 %.