7Li solar axions: Preliminary results and feasibility studies

7Li solar axions: preliminary results and feasibility studies

“…Three LiF samples were used in the measurements: i) two LiF powders of different production of 243 g and 47 g, measured in GSOR detector during 722 h and 914 h respectively); ii) a LiF(W) crystal of 224 g, measured with the GEBER detector during 633 h. Details about these measurement and results are reported in ref. [8].…”

“…1 bottom), and only limit on its area with some confidence level can PoS(idm2008)105 be set. These limits have been derived by considering different statistical approaches [8]. With the so-called "one sigma approach", the more cautious limit on the S value has been obtained as 39 at 90% C.L..…”

“…For details see ref. [8]. The conclusion of these estimations is that the only background processes potentially important -assuming absence of a suitable neutron shield -are: i) possible pollution of the LiF sample by 10 B (because of reaction n + 10 B → 7 Li * + α); ii) excitation of the 478 keV level of 7 Li by α and 3 H particles from reaction n + 6 Li → 3 H + α.…”

Search for resonant absorption of solar axions emitted in M1 transition in 57Fe nuclei

“…Since axions are pseudoscalar particles they can be emitted in nuclear magnetic transitions. Attempts to detect 478 keV monochromatic axions through the resonant absorption in a 7 Li nuclei target have been performed in [24][25][26][27].…”

Search for 14.4 keV solar axions emitted in the M1-transition of57Fe nuclei with CAST

“…, which means that axions can be emitted in magnetic nuclear transitions. Up to now, these monoenergetic solar axions have mostly been searched for by using the resonant axion absorption process in targets made of the same nuclides in a terrestrial laboratory [27][28][29][30][31][32][33], or via processes based on axionelectron interactions, like Compton conversion of axion to photon and the axioelectric effect [34,35].…”