Measurement of the quenching factor of Na recoils in NaI(Tl)

Chagani, H.; Majewski, P.; Daw, E. J.; Kudryavtsev, V. A.; Spooner, N. J. C.

doi:10.1088/1748-0221/3/06/p06003

Cited by 48 publications

(78 citation statements)

References 37 publications

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“…For example, [25] reports a sodium quenching factor Q N a = 0.4 ± 0.2 over 5-100 keV. Other experiments report smaller quenching factors with smaller errors: 0.275 ± 0.018 over 4-252 keV [26], and 0.25 ± 0.06 at 10 keV [27]. On the other hand, in many cases it is anticipated that the quenching factor will rise at the lower recoil energies associated with DAMA, as shown in [28].…”

Section: Resultsmentioning

confidence: 99%

Dark moments and the DAMA-CoGeNT puzzle

2010

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We consider the velocity dependence arising from scattering through dark multipole moments, and its effects on the consistency of the signals observed by DAMA and CoGeNT with the dark matter hypothesis. We focus on the effects of the experimental uncertainties on the fits, and show that the two experiments combined favor dark matter scattering with a velocity-dependent crosssection over standard velocity and spin-independent scattering. When appropriate uncertainties are taken into account, we show that agreement of the two signals with each other and with the results of null experiments can be obtained.

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Section: Resultsmentioning

confidence: 99%

Dark moments and the DAMA-CoGeNT puzzle

2010

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“…This factor has a strong dependence on energy and unfortunately it is not well known for energies < 4 keV, although there are several ongoing efforts to measure Q in this energy range [26]. However, measurements for event energies > 4 keV [27] agree with Lindhard's theory [28,29]. Figure 10 shows the predicted silicon quenching factor by Lindhard, and the available measurements at different recoils energies.…”

Section: A Event Ratementioning

confidence: 99%

“…The goal of CONNIE is the first unambigous Energy spectra for events expected in silicon detectors: the nuclear-recoil energy spectrum (-); the spectrum for detectable events (--), using the quenching factor from Lindhand, et al [28,29].…”

Section: Ccd Experiments At Reactormentioning

confidence: 99%

Charge coupled devices for detection of coherent neutrino-nucleus scattering

et al. 2015

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This article details the potential for using Charge Coupled Devices (CCD) to detect low-energy neutrinos through their coherent scattering with nuclei. The detection of neutrinos through this standard model process has not been accessible because of the small energy deposited in such interactions with the detector nuclei. Typical particle detectors have thresholds of a few keV, and most of the energy deposition expected from coherent scattering is well below this level. The devices we discuss can be operated at a threshold of approximately 30 eV, making them ideal for observing this signal. For example, the number of coherent scattering events expected on a 52 gram CCD array located next to a power nuclear reactor is estimated to be near to 626 events/year. The results of our study show that detection at a confidence level of 99% can be reached within three months for this kind of detector array.

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“…This indicates that sever tension remains in the combined fit. In the right panel we show a recent measurment of q Na from [7]. These data suggest even a slightly lower value of q Na in the low energy region relevant for DAMA (E nr ≃ 10 keV) of about q Na ≈ 0.25 ± 0.05.…”

Section: Pos(idm2010)070mentioning

confidence: 85%

“…The shaded region corresponds to a combined DAMA/CoGeNT fit for q Na = 0.3 ± 0.1. Right: measurement of q Na from [7]. of 8.4 ± 1.4 events, mainly from α's with a small contribution from neutrons and γ's, see [5] for a recent update confirming the excess.…”

Section: Pos(idm2010)070mentioning

confidence: 99%

Direct detection data and possible hints for low-mass WIMPs

Schwetz¹

2011

Proceedings of Identification of Dark Matter 2010 — PoS(IDM2010)

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Possible hints for WIMP dark matter with mass around 10 GeV coming from the DAMA, CoGeNT, and maybe also CRESST experiments are presented, and confronted with constraints from CDMS and XENON data. Focusing on spin-independent (SI) WIMP-nucleus interactions, I elaborate on the difficulties to make the hints consistent with each other and to evade the constraints, mentioning energy scale uncertainties, quenching and light-yield factors, as well as uncertainties on halo properties. In the present situation it seems hard to reconcile all data within the SI framework, which suggests that if the experimental anomalies were indeed due to dark matter a more exotic mechanism (to be identified) had to be at work.

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Measurement of the quenching factor of Na recoils in NaI(Tl)

Cited by 48 publications

References 37 publications

Dark moments and the DAMA-CoGeNT puzzle

Dark moments and the DAMA-CoGeNT puzzle

Charge coupled devices for detection of coherent neutrino-nucleus scattering

Direct detection data and possible hints for low-mass WIMPs

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