Application of Low-Level Counting Techniques for the Investigation of the Impact of Uranium Mining as Well as Remediation on the Environment

Niese, S.

doi:10.1007/978-94-009-0327-2_35

Cited by 1 publication

(3 citation statements)

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“…Again, the depth determinations were consistent both from the terrain features and from the muon intensity. In those tunnels, the integrated muon intensity is [35][36][37][38][39][40] times lower than at the surface.…”

Section: Conclusion Summary and Outlookmentioning

confidence: 99%

“…In addition, four more places were studied in tunnel IV, which hosts a γ-counting facility established in 1982 [36] and enlarged in 1995 [37]: 5. Position 5 at the very end of tunnel IV.…”

Section: Introductionmentioning

confidence: 99%

“…Position 7 is located in Messkammer 2 (hereafter called MK2). MK2 has 210 g/cm 2 areal density shielding, made up of 6 cm old steel, 3 cm lead and 27 cm iron pellets [37]. 8.…”

Section: Introductionmentioning

confidence: 99%

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The muon intensity in the Felsenkeller shallow underground laboratory

Ludwig

Wagner

Al-Abdullah

et al. 2019

Astroparticle Physics

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The muon intensity and angular distribution in the shallow-underground laboratory Felsenkeller in Dresden, Germany have been studied using a portable muon detector based on the close cathode chamber design. Data has been taken at four positions in Felsenkeller tunnels VIII and IX, where a new 5 MV underground ion accelerator is being installed, and in addition at four positions in Felsenkeller tunnel IV, which hosts a low-radioactivity counting facility. At each of the eight positions studied, seven different orientations of the detector were used to compile a map of the upper hemisphere with 0.85 • angular resolution. The muon intensity is found to be suppressed by a factor of 40 due to the 45 m thick rock overburden, corresponding to 140 meters water equivalent. The angular data are matched by two different simulations taking into account the known geodetic features of the terrain: First, simply by determining the cutoff energy using the projected slant depth in rock and the known muon energy spectrum, and second, in a Geant4 simulation propagating the muons through a column of rock equal to the known slant depth. The present data are instrumental for studying muon-induced effects at these depths and also in the planning of an active veto for accelerator-based underground nuclear astrophysics experiments. [34,35] that such a veto may reduce the observed background in γ-detectors typical for in-beam nuclear astrophysics experiments to a level that is close to the background in the same detectors deep underground, underlining the importance of a proper muon veto.This work is organized as follows. The underground site is described in sec. 2. Section 3 introduces the experimental setup, including the REGARD muon telescope used here, and experimental procedures. The data analysis and results are presented in sec. 4. The data are then matched, first, by a calculation based on the known rangeenergy relation, and second, by a Monte Carlo simulation using the Geant4 framework (sec. 5). A discussion is offered in sec. 6. The conclusions, a summary and an outlook are given in sec. 7. Description of the underground site studiedThe shallow-underground site Felsenkeller is located in the Plauenscher Grund district, inside the city of Dresden, Germany. The site extends along the Weißeritz river, a tributary of the Elbe, and was used as a quarry until the 18th century, then converted to a brewery, which in turn closed in 1991. The terrain is characterized by a steep cliff that runs from Northeast to Southwest, an approximately flat high plain at 200 m a.s.l. and a river floodplain at 140 m a.s.l. (Fig. 1).Nine horizontal storage tunnels were dug into the rock from 1856 to 1859. All nine tunnels have horizontal access and are interconnected in a comb-like structure (Fig. 2). The site is protected from cosmic rays by an overburden of 45 m of hornblende monzonite rock, part of the "Meißner Massiv" formation. The density of rock samples taken from the tunnels VIII and IX was here found to be (2.69±0.06) g/cm 3 . The hornblende mon...

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Section: Conclusion Summary and Outlookmentioning

confidence: 99%

“…In addition, four more places were studied in tunnel IV, which hosts a γ-counting facility established in 1982 [36] and enlarged in 1995 [37]: 5. Position 5 at the very end of tunnel IV.…”

Section: Introductionmentioning

confidence: 99%