Event Rates for the Scattering of Weakly Interacting Massive Particles from 23Na and 40Ar

Abstract

Detection rates for the elastic and inelastic scattering of weakly interacting massive particles (WIMPs) off 23Na are calculated within the framework of Deformed Shell Model (DSM) based on Hartree-Fock states. At first, the spectroscopic properties of the detector nucleus, like energy spectra and magnetic moments, are evaluated and compared with experimental data. Following the good agreement of these results, DSM wave functions are used for obtaining elastic and inelastic spin structure functions, nuclear structure coefficients and so forth for the WIMP-23Na scattering. Then, the event rates are also computed with a given set of supersymmetric parameters. In the same manner, using DSM wavefunctions, nuclear structure coefficients and event rates for elastic scattering of WIMPs from 40Ar are also obtained. These results for event rates and also for annual modulation will be useful for the ongoing and future WIMP detection experiments involving detector materials with 23Na and 40Ar nuclei.

Concept of Coherence in Neutrino and Antineutrino Scattering off Nuclei

“…Inelastic cross sections for the ν(ν)A scattering due to weak neutral currents were calculated within modern nuclear models for specific excitation levels of particular nuclei, for example, in [63][64][65]. Recently, similar calculations have been generalized to inelastic scattering of neutral dark-matter particles by nuclei [56,66,67].…”

“…In [56], detailed calculations were performed for cross sections and counting rates of elastic and inelastic scattering events on the 73 Ge, 127 I, 133 Cs and 133 Xe nuclei. Similar calculations for 23 Na and 40 Ar were performed in [66]. In the case of the neutrino-nucleus scattering, the authors used formulas from [1][2][3].…”

Cross sections of neutral-current neutrino scattering on 98,100Mo isotopes

“…This procedure has been found to be quite successful in describing the spectroscopic properties and electromagnetic properties of many nuclei in the mass region A = 60-90 and has also been applied to double beta decay nuclear transition matrix elements [29]. In addition, this model has recently been used to describe many weak interaction processes [39][40][41][42][43][44].…”