scholarly journals Response of undoped cryogenic CsI to low-energy nuclear recoils

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
C. M. Lewis ◽  
J. I. Collar
Keyword(s):  
Low Energy ◽  
Nuclear Recoils

scholarly journals Exploring $$\hbox {CE}\nu \hbox {NS}$$ with NUCLEUS at the Chooz nuclear power plant

2019 ◽  
Vol 79 (12) ◽  
Author(s):  
G. Angloher ◽  
F. Ardellier-Desages ◽  
A. Bento ◽  
L. Canonica ◽  
A. Erhart ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Sensitivity Study ◽  
New Physics ◽  
Low Energy ◽  
Cryogenic Detectors ◽  
Reduction Techniques ◽  
Low Energies ◽  
Nuclear Recoils

AbstractCoherent elastic neutrino–nucleus scattering ($$\hbox {CE}\nu \hbox {NS}$$CEνNS) offers a unique way to study neutrino properties and to search for new physics beyond the Standard Model. Nuclear reactors are promising sources to explore this process at low energies since they deliver large fluxes of anti-neutrinos with typical energies of a few MeV. In this paper, a new-generation experiment to study $$\hbox {CE}\nu \hbox {NS}$$CEνNS is described. The NUCLEUS experiment will use cryogenic detectors which feature an unprecedentedly low-energy threshold and a time response fast enough to be operated under above-ground conditions. Both sensitivity to low-energy nuclear recoils and a high event rate tolerance are stringent requirements to measuring $$\hbox {CE}\nu \hbox {NS}$$CEνNS of reactor anti-neutrinos. A new experimental site, the Very-Near-Site (VNS), at the Chooz nuclear power plant in France is described. The VNS is located between the two 4.25 $$\hbox {GW}_{\mathrm {th}}$$GWth reactor cores and matches the requirements of NUCLEUS. First results of on-site measurements of neutron and muon backgrounds, the expected dominant background contributions, are given. In this paper a preliminary experimental set-up with dedicated active and passive background reduction techniques and first background estimations are presented. Furthermore, the feasibility to operate the detectors in coincidence with an active muon veto at shallow overburden is studied. The paper concludes with a sensitivity study pointing out the physics potential of NUCLEUS at the Chooz nuclear power plant.

scholarly journals Identification of low energy nuclear recoils in a gas time projection chamber with optical readout

2020 ◽  
Vol 32 (2) ◽  
pp. 025902
Author(s):  
E Baracchini ◽  
L Benussi ◽  
S Bianco ◽  
C Capoccia ◽  
M Caponero ◽  
...  
Keyword(s):  
Time Projection Chamber ◽  
Low Energy ◽  
Optical Readout ◽  
Nuclear Recoils ◽  
Time Projection

scholarly journals Analysis of the 40K contamination in NaI(Tl) crystals from different providers in the frame of the ANAIS project

2014 ◽  
Vol 29 (19) ◽  
pp. 1443010 ◽  
Author(s):  
C. Cuesta ◽  
J. Amaré ◽  
S. Cebrián ◽  
E. García ◽  
C. Ginestra ◽  
...  
Keyword(s):  
Dark Matter ◽  
Sodium Iodide ◽  
Low Energy ◽  
Annual Modulation ◽  
Dark Matter Search ◽  
Scintillation Signal ◽  
Nuclear Recoils ◽  
Search Experiment ◽  
Low Efficiency ◽  
Electron Equivalent

NaI(Tl) large crystals are applied in the search for galactic dark matter particles through their elastic scattering off the target nuclei in the detector by measuring the scintillation signal produced. However, energies deposited in the form of nuclear recoils are small, which added to the low efficiency to convert that energy into scintillation, makes that events at or very near the energy threshold, attributed either to radioactive backgrounds or to spurious noise (nonbulk NaI(Tl) scintillation events), can compromise the sensitivity goals of such an experiment. DAMA/LIBRA experiment, using 250 kg NaI(Tl) target, reported first evidence of the presence of an annual modulation in the detection rate compatible with that expected for a dark matter signal just in the region below 6 keVee (electron equivalent energy). In the frame of the ANAIS (Annual modulation with NaI Scintillators) dark matter search project a large and long effort has been carried out in order to understand the origin of events at very low energy in large sodium iodide detectors and develop convenient filters to reject those nonattributable to scintillation in the bulk NaI(Tl) crystal. 40K is probably the most relevant radioactive contaminant in the bulk for NaI(Tl) detectors because of its important contribution to the background at very low energy. ANAIS goal is to achieve levels at or below 20 ppb natural potassium. In this paper we will report on our effort to determine the 40K contamination in several NaI(Tl) crystals, by measuring in coincidence between two (or more) of them. Results obtained for the 40K content of crystals from different providers will be compared and prospects of the ANAIS dark matter search experiment will be briefly reviewed.

Excited level lifetime measurements following very low energy nuclear recoils

1992 ◽  
Vol 75 (1-4) ◽  
pp. 533-542 ◽  
Author(s):  
S. J. Robinson ◽  
J. Jolie ◽  
H. G. Börner ◽  
S. Ulbig ◽  
D. Janssen
Keyword(s):  
Excited Level ◽  
Low Energy ◽  
Lifetime Measurements ◽  
Level Lifetime ◽  
Nuclear Recoils
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