BRAGG-PRIMAKOFF AXION PHOTOCONVERSION IN CRYSTAL DETECTORS

Bragg-Primakoff axion photoconversion in crystal detectors

Abstract Axions and axion-like pseudoscalar particles with dimension-5 couplings to photons exhibit coherent Primakoff scattering with ordered crystals at keV energy scales, making for a natural detection technique in searches for solar axions.We find that there are large suppressive Gift Card corrections, potentially greater than a factor of O $$

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Token-Based Access Control

Traditional centralized access control has some shortcomings in robustness, trustworthiness and circulation.Blockchains have the advantages of fault tolerance and trust.Smart contracts have the characteristics of automatic execution and flexible expansion.Tokens can well record credential information and transfer easily.In this paper, blockchain, s

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