Limits on the annual modulation of WIMPs-nucleus scattering with large-volume NaI(Tl) scintillators

Fushimi, K.; Ejiri, H.; Hayashi, Kohei; Hazama, R.; Kishimoto, T.; Kudomi, Nobuyuki; Kume, Kazuhiko; Ohsumi, H.

doi:10.1016/s0927-6505(99)00086-9

Cited by 31 publications

(43 citation statements)

References 16 publications

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“…For the excitation we used a Xray BULLET R 40 kV source. The sample was mounted in an silver-coated reflecting cavity installed inside a 4 He cryostat, and an Avantes optical fiber transmitted the light to the optical detector. More experimental details can be found in [6].…”

Section: Low Temperature X-ray Scintillation Measurementsmentioning

confidence: 99%

“…They are widely used as detectors for ionizing radiation and in particular they constitute an excellent target for dark matter searches by direct detection, having been used in a number of past and present experiments [1][2][3][4][5]. Nevertheless the high hygroscopicity of this material complicates its handling, especially for low temperature applications, and is one of the reasons why it has not been tested yet as a bolometer, despite its appealing features (see [6] for a discussion about the interest of this target for a bolometric dark matter search).…”

Section: Introductionmentioning

confidence: 99%

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Response of parylene-coated NaI(Tl) scintillators at low temperature

Coron

Cuesta²,

Garcı́a³

et al. 2014

EPJ Web of Conferences

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Abstract. Despite that it is widely used as a scintillator at room temperature, the hygroscopicity of NaI complicates its handling and limits its application for many purposes, for example as a cryogenic detector. To overcome this problem we study coating materials that can act as humidity barriers, in particular parylene, a polymer that can be deposited in very radiopure, thin and conformal layers. In this work, several NaI(Tl) samples coated with 2-5 µm parylene-C were tested at low temperature. Luminescence spectra under X-ray excitation are presented at several temperatures as well as the light output vs temperature at 1.5-300 K. Several thermoluminescence peaks were observed at around 60, 95 and 150 K during warm up to room temperature. The mechanical resistance of the coating under thermal cycles was also investigated, and we observed a degradation of the optical appearance and the light output after cooling down to about 100 mK, which compromises the reusability of the samples.

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Section: Low Temperature X-ray Scintillation Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Response of parylene-coated NaI(Tl) scintillators at low temperature

Coron

Cuesta²,

Garcı́a³

et al. 2014

EPJ Web of Conferences

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“…Due to the large background level, it used data at energies above 8 keV, which reduced the WIMP search sensitivity significantly. No sizeable modulation effect was observed with the data obtained for 1 year [43].…”

Section: Experiments With Nai(tl) Crystalsmentioning

confidence: 47%

Read-Out Signal Simulation of an Optical Disk Having an Oxide Super-Resolution Film

Ariyoshi

Shimano

Shintani

et al. 2000

Jpn. J. Appl. Phys.

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One of the widely adapted experimental techniques for the direct search for dark matter is the use of inorganic crystal scintillators. Several experimental groups have carried out direct dark matter search experiments using NaI(Tl), CsI(Tl) and CaF 2 (Eu) crystals. The history, status and critical issues regarding these crystal scintillators as dark matter detectors are reviewed in this paper, and the prospects of performing future dark matter searches with these detectors are discussed.

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“…5. The data are taken from experiments BRS, (NaI, 1992) [76,77], BPRS (CaF 2 , 1993) [78], EDELWEISS (sapphire, 1996) [79], DAMA (NAI, 1996) [80], DAMA (CaF 2 , 1999) [81,82], UKDMS (NaI, 1996) [83][84][85][86], ELEGANT (CaF 2 , 1998) [87], ELEGANT (NaI, 1999) [88,89] can, in general, conclude that an about two-orders-of-magnitude improvement of the current DM experimental sensitivities (in the form of these exclusion curves) is needed to reach the SUSY predictions for the σ p,n SD , provided the SUSY lightest neutralino is the best WIMP particle candidate.…”

Section: B Constraints On Wimp-nucleon Spin Interactionsmentioning

confidence: 99%

Dark matter search after DAMA withG73e

Bednyakov

Klapdor‐Kleingrothaus²

2004

Phys. Rev. D

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The Weakly Interacting Massive Particle (WIMP) is one of the main candidates for the relic dark matter (DM). In the effective low-energy minimal supersymmetric standard model (effMSSM) the neutralino-nucleon spin and scalar cross sections in the low-mass regime were calculated. The calculated cross sections are compared with almost all experimental currently available exclusion curves for spin-dependent WIMP-proton and WIMP-neutron cross sections. It is demonstrated that in general about two-orders-of-magnitude improvement of the current DM experiment sensitivities is needed to reach the (effMSSM) SUSY predictions. At the current level of accuracy it looks reasonable to safely neglect sub-dominant spin WIMP-nucleon contributions analyzing the data from spin-non-zero targets. To avoid misleading discrepancies between data and SUSY calculations it is, however, preferable to use a mixed spin-scalar coupling approach. This approach is applied to estimate future prospects of experiments with the odd-neutron high-spin isotope 73 Ge. It is noticed that the DAMA evidence favors the light Higgs sector in the effMSSM, a high event rate in a 73 Ge detector and relatively high upgoing muon fluxes from relic neutralino annihilations in the Earth and the Sun.

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Limits on the annual modulation of WIMPs-nucleus scattering with large-volume NaI(Tl) scintillators

Cited by 31 publications

References 16 publications

Response of parylene-coated NaI(Tl) scintillators at low temperature

Response of parylene-coated NaI(Tl) scintillators at low temperature

Read-Out Signal Simulation of an Optical Disk Having an Oxide Super-Resolution Film

Dark matter search after DAMA withG73e

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