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Precision measurements of the Co-60 beta-asymmetry parameter in search for tensor currents in weak interactions
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SYSNO ASEP 0358087 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Precision measurements of the Co-60 beta-asymmetry parameter in search for tensor currents in weak interactions Tvůrce(i) Wauters, F. (BE)
Kraev, I. (BE)
Zákoucký, Dalibor (UJF-V) RID, SAI, ORCID
Beck, M. (BE)
Breitenfeldt, M. (BE)
De Leebeeck, V. (BE)
Golovko, V.V. (BE)
Kozlov, V. Yu. (BE)
Phalet, T. (BE)
Roccia, S. (BE)
Soti, G. (BE)
Tandecki, M. (BE)
Towner, I. S. (US)
Traykov, E. (BE)
Van Gorp, S. (BE)
Severijns, N. (BE)Zdroj.dok. Physical Review. C - ISSN 0556-2813
Roč. 82, č. 5 (2010), 055502/1-055502/14Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova NUCLEAR-MAGNETIC-RESONANCE ; POSITRON DECAY ; PARITY CONSERVATION Vědní obor RIV BG - Jaderná, atomová a mol. fyzika, urychlovače CEP LA08015 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z10480505 - UJF-V (2005-2011) UT WOS 000286731900004 DOI 10.1103/PhysRevC.82.055502 Anotace The beta-asymmetry parameter (A) over tilde for the Gamow-Teller decay of Co-60 was measured by polarizing the radioactive nuclei with the brute-force low-temperature nuclear-orientation method. The Co-60 activity was cooled down to milliKelvin temperatures in a He-3-He-4 dilution refrigerator in an external 13-T magnetic field. The beta particles were observed by a 500-mu m-thick Si PIN diode operating at a temperature of about 10 K in a magnetic field of 0.6 T. Extensive GEANT4 Monte Carlo simulations were performed to gain control over the systematic effects. Our result, (A) over tilde = -1.014(12)(stat)(16)(syst), is in agreement with the standard-model value of -0.987(9), which includes recoil-order corrections that were addressed for the first time for this isotope. Further, it enables limits to be placed on possible tensor-type charged weak currents, as well as other physics beyond the standard model. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2011
Počet záznamů: 1