Resolving power of gamma-ray coincidence spectrometry using lithium drifted germanium detectors and its application to multiple radioisotope analysis

1970 ◽  
Vol 42 (3) ◽  
pp. 383-387 ◽  
Author(s):  
I. M. H. Pagden ◽  
J. C. Sutherland
Keyword(s):  
Gamma Ray ◽  
Resolving Power ◽  
Germanium Detectors

3D positioning germanium detectors for gamma-ray astronomy

2003 ◽  
Author(s):  
Wayne Coburn ◽  
Susan Amrose ◽  
Steven E. Boggs ◽  
Robert P. Lin ◽  
Mark S. Amman ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Germanium Detectors ◽  
Gamma Ray Astronomy ◽  
3D Positioning

Gamma-Ray Spectra of Fission Products Observed with Lithium Drifted Germanium Detectors

1966 ◽  
Vol 3 (5) ◽  
pp. 200-207 ◽  
Author(s):  
Sei-ichi TAKAYANAGI ◽  
Noboru OI ◽  
Tetsuji KOBAYASHI ◽  
Tohru SUGITA
Keyword(s):  
Gamma Ray ◽  
Fission Products ◽  
Germanium Detectors

Automatic analysis of gamma-ray spectra from germanium detectors

1976 ◽  
Vol 137 (3) ◽  
pp. 525-536 ◽  
Author(s):  
Gary W. Phillips ◽  
Keith W. Marlow
Keyword(s):  
Gamma Ray ◽  
Automatic Analysis ◽  
Germanium Detectors

scholarly journals Study of cosmogenic activation in copper for rare event search experiments

2021 ◽  
Vol 81 (11) ◽  
Author(s):  
Ze She ◽  
Zhi Zeng ◽  
Hao Ma ◽  
Qian Yue ◽  
Mingkun Jing ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Rare Event ◽  
Background Level ◽  
Germanium Detectors ◽  
Production Rates ◽  
Background Estimation ◽  
Gamma Ray Spectrometer ◽  
Detector Structure ◽  
Cosmogenic Activation ◽  
The Impact

AbstractRare event search experiments using germanium detectors are performed in underground laboratories to minimize the background induced by cosmic rays. However, the cosmogenic activation of cupreous detector components on the ground generates long half-life radioisotopes and contributes to the background level. We measured cosmogenic activation with 142.50 kg of copper bricks after 504 days of exposure at an altitude of 2469.4 m outside the China Jinping Underground Laboratory (CJPL). The specific activities of the cosmogenic nuclides produced in the copper bricks were measured using a low-background germanium gamma-ray spectrometer at CJPL. The production rates at sea level, in units of nuclei/kg/day, were $${18.6 \pm 2.0}$$ 18.6 ± 2.0 for $${^{54}}$$ 54 Mn, $${9.9 \pm 1.3}$$ 9.9 ± 1.3 for $${^{56}}$$ 56 Co, $${48.3 \pm 5.5}$$ 48.3 ± 5.5 for $${^{57}}$$ 57 Co, $${51.8 \pm 2.5}$$ 51.8 ± 2.5 for $${^{58}}$$ 58 Co, and $${39.7 \pm 5.7}$$ 39.7 ± 5.7 for $${^{60}}$$ 60 Co. The measurement will help to constrain cosmogenic background estimation for rare event searches using copper as a detector structure and shielding material. Based on the measured production rates, the impact of the cosmogenic background in cupreous components of germanium detectors on the next generation CDEX-100 experiment was assessed with the expected exposure history above ground.

scholarly journals KOOLS–IFU: Kyoto Okayama Optical Low-dispersion Spectrograph with optical-fiber Integral Field Unit

2019 ◽  
Vol 71 (5) ◽  
Author(s):  
Kazuya Matsubayashi ◽  
Kouji Ohta ◽  
Fumihide Iwamuro ◽  
Ikuru Iwata ◽  
Eiji Kambe ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Gamma Ray ◽  
Field Of View ◽  
Resolving Power ◽  
Optimal Conditions ◽  
Total Field ◽  
Fiber Array ◽  
Field Unit ◽  
Low Dispersion ◽  
Integral Field

Abstract Observations of transient objects, such as short gamma-ray bursts and electromagnetic counterparts of gravitational wave sources, require prompt spectroscopy. To carry out prompt spectroscopy, we have developed an optical-fiber integral field unit (IFU) and connected it with an existing optical spectrograph, KOOLS. KOOLS–IFU was mounted on the Okayama Astrophysical Observatory 188 cm telescope. The fiber core and cladding diameters of the fiber bundle are 100 μm and 125 μm, respectively, and 127 fibers are hexagonally close-packed in the sleeve of the two-dimensional fiber array. We conducted test observations to measure the KOOLS–IFU performance and obtained the following conclusions: (1) the spatial sampling is ${2{^{\prime\prime}_{.}}34}$$\, \pm \,$${0{^{\prime\prime}_{.}}05}$ per fiber, and the total field of view is ${30{^{\prime\prime}_{.}}4}$$\, \pm \,$${0{^{\prime\prime}_{.}}65}$ with 127 fibers; (2) the observable wavelength and the spectral resolving power of the grisms of KOOLS are 4030–7310 Å and 400–600, 5020–8830 Å and 600–900, 4160–6000 Å and 1000–1200, and 6150–7930 Å and 1800–2400, respectively; and (3) the estimated limiting magnitude is 18.2–18.7 AB mag during 30 min exposure under optimal conditions.

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