-
Article
Characterization of Non-uniformities in Superconducting Tunnel Junction Radiation Detectors
The small dimensions of superconducting tunnel junction (STJ) radiation detectors have motivated the development of STJ arrays to increase detection efficiency and statistical accuracy. We have used a pulsed U...
-
Article
Absolute Decay Counting of \(^{146}\) Sm and \(^{147}\) Sm for Early Solar System Chronology
Sm–Nd chronometers use \(^{146}\) 146 ...
-
Article
Study of Pile-Up Effects in Decay Energy Spectroscopy
Pile-up is an unavoidable complication for cryogenic detectors with relatively large heat capacities and slow rise time, such as systems for decay energy spectroscopy employing large Au absorbers. We have simu...
-
Article
Radio-Frequency Resonances and Dam** in Metallic Magnetic Calorimeter Sensors
Metallic magnetic calorimeters (MMCs) are particle detectors that combine ultra-high energy resolution with a predictable and smooth response based on the physics of paramagnetism. For best energy resolution, ...
-
Article
A New Measurement of the 60 keV Emission from Am-241 Using Metallic Magnetic Calorimeters
We report a new measurement of the 60 keV transition from 241Am. It uses a metallic magnetic calorimeter gamma-ray detector calibrated in the region around 60 keV by four accurately known X-rays and gamma rays fr...
-
Article
Metallic Magnetic Calorimeters for High-Accuracy Nuclear Decay Data
Metallic magnetic calorimeters (MMCs) combine the excellent energy resolution of cryogenic gamma ray detectors with a very small nonlinearity and a reproducible response, owing to their magnetization-based sen...
-
Article
Status of the AMoRE Experiment Searching for Neutrinoless Double Beta Decay Using Low-Temperature Detectors
The goal of the Advanced Mo-based Rare process Experiment (AMoRE) is to search for the neutrinoless double beta decay of \(^{100}\) ...
-
Article
Trigger Study on the AMoRE-Pilot Detector
We present a systematic trigger study for the Advanced Molybdenum-based Rare process Experiment (AMoRE), an international project searching for the neutrinoless double beta decay (
-
Article
Vibration Mitigation for a Cryogen-Free Dilution Refrigerator for the AMoRE-Pilot Experiment
The Advanced Mo-based Rare process Experiment utilizes a cryogen-free dilution refrigerator to operate its low-temperature detectors. Mechanical vibration originating from its pulse tube refrigerator can affec...
-
Article
Development of MMC Gamma Detectors for Precise Characterization of Uranium Isotopes
Precise nuclear data from radioactive decays are important for the accurate non-destructive assay of fissile materials in nuclear safeguards. We are develo** high energy resolution gamma detectors based on m...
-
Article
Integrated SQUID/Sensor Metallic Magnetic Microcalorimeter for Gamma-Ray Spectroscopy
Metallic magnetic microcalorimeters (MMCs) achieve energy resolution comparable to transition-edge sensors (TESs) but rely on different measurement physics that may allow MMCs to surpass TESs in some future ap...
-
Article
Diatreme evolution during the phreatomagmatic eruption of the Songaksan tuff ring, Jeju Island, Korea
The Songaksan tuff ring, Jeju Island, Korea, which erupted ca. 3.7 ka BP in a coastal setting, provides an unusual opportunity to study the processes of phreatomagmatic eruption and the formation of a diatreme...
-
Article
Development of Metallic Magnetic Calorimeters with a Critical Temperature Switch
We report on the progress in the development of meander-shaped metallic magnetic calorimeters (MMCs) with a critical temperature switch. A niobium meander-shaped coil in an MMC is arranged to form a supercondu...
-
Article
Open AccessSearch for solar axions with CsI(Tl) crystal detectors
The results of a search for solar axions from the Korea Invisible Mass Search (KIMS) experiment at the Yangyang Underground Laboratory are presented. Low-energy electron-recoil events would be produced by conv...
-
Article
Open AccessPulse-shape discrimination between electron and nuclear recoils in a NaI(Tl) crystal
We report on the response of a high light-output NaI(Tl) crystal to nuclear recoils induced by neutrons from an Am-Be source and compare the results with the response to electron recoils produced by Compton-sc...
-
Article
Monte Carlo Simulation and Experimental Study of Alpha Decays in 4 \(\pi \) Absorbers
To investigate the possible origins of peak splitting and low energy tails in measured Q spectra of 4 \(\pi \) ...
-
Article
Fabrication of Metallic Magnetic Calorimeter for Radionuclide Analysis
We present a detailed report on the fabrication process of a metallic magnetic calorimeter (MMC). The MMC is configured in a planar geometry with a meander-shaped pickup coil covered with a Au:Er temperature s...
-
Article
Thermal Model and Optimization of a Large Crystal Detector Using a Metallic Magnetic Calorimeter
We established a simple thermal model of the heat flow in a large crystal detector designed for a neutrinoless double beta decay experiment. The detector is composed of a CaMoO \(_{4}\) ...
-
Article
Post 19 ka B.P. eruptive history of Ulleung Island, Korea, inferred from an intra-caldera pyroclastic sequence
Ulleung Island is a Quaternary volcanic island located in the mid-western part of the East Sea (Sea of Japan) back-arc basin, which has erupted from the Pliocene until the late Holocene. This study focuses on ...
-
Article
A case of isolated bilateral pulmonary arterial calcification diagnosed in utero
We report a very rare case of isolated multiple pulmonary arterial calcification with severe bilateral peripheral pulmonary arterial stenosis diagnosed in utero. Despite treatment with bisphosphonate for 6 months...
