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Quenched E1 transitions rates in .SUB.231 Th
- 1.
SYSNO ASEP 0185174 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Quenched E1 transitions rates in .SUB.231 Th Tvůrce(i) Aas, A. J. (NO)
Mach, H. (SE)
Kvasil, J. (CZ)
Borge, M. J. G. (ES)
Fogelberg, B. (SE)
Grant, I. S. (GB)
Gulda, K. (PL)
Hoff, P. (NO)
Kurcewicz, W. (PL)
Lindroth, A. (SE)
Martínez, T. (ES)
Macková, Anna (UJF-V) RID, ORCID, SAI
Rubio, B. (ES)
Smith, J. F. (GB)Zdroj.dok. Nuclear Physics. A. - : Elsevier - ISSN 0375-9474
Roč. 654, - (2000), s. 499-522Poč.str. 23 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Vědní obor RIV BG - Jaderná, atomová a mol. fyzika, urychlovače CEZ AV0Z1048901 - UJF-V Anotace The fast timing á.sub.çç(t) method has been used to measurelifetimes of the low-lying levels in .sub.231 Th populatedin the á.sub.- decay of .sub.231 Ac. The half-life of the K.sub.ă= 5/2.sub.- band-head at 185.7 keV was measured as T.sup.1/2=1073(79) ps, yielding D.sup.o=1.76(8)x10.sub.-2 e.fmand 1.65(6)x10.sub.-2 e.fm for the E1 transitions to the 7/2.sub.+ and 5/2.sub.+ members respectively of the K.sub.ă=5/2.sub.+ groun state band. Furthermore, T.sup.1/2 ó 74 ps andó74 ps were measured for the K.sub.ă = 3/2.sub.+ and 1/2.sub.+ band-heads at 221.4 and 247.6 keV, and T.sup.1/2=503(12) ps and 98(36) ps for the 1/2.sub.- and 3/2.sub.- statesat 554.7 and 593.6 keV, members of the K.sub.ă=1/2.sub.- and3/2.sub.- states at 554.7 and 593.6 keV, members of the K.sub.ă=1/2.sub.- band. The latter results consistently yieldD.sup.o values of the order of 1.1x10.sub.-2 e.fm for threetransitions connecting the K.sub.ă=1/2ń bands. The observedtransistion rates have been interpreted within the quasiparticle-phonon model with the inclusion of Coriolis coupling. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2001
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