Parity violation in the \u3b3-decay of polarized 93Tc nuclei in the isomeric state

M., Hass
C., Broude
L., Weissman
L., M\ufcller
Montagnoli, Giovanna
Scarlassara, Fernando
Segato, Gianfranco
Signorini, Cosimo
G., Goldring
D., Ackermann
P., Bednarczyk
L., Corradi
P., Spolaore
M., Lindroos
S., Hormann
V., Ninov
F. P., Hessberger
Soramel, Francesca
N., Takahashi
B. A., Brown

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Publication date

January 1996

DOI

10.1016/0370-2693(95)01596-5

Publisher

Elsevier BV

ISSN

0370-2693

Citation count (estimate)

Abstract

We report on a determination of the parity nonconserving (PNC) matrix element in the bound parity doublet of 93Tc. The experiment was carried out at the GSI, Darmstadt and LNL, Legnaro laboratories. The recoil-mass-separated radioactive beam of 93Tc nuclei in the isomer, following a fusion-evaporation reaction, was polarized by the tilted-foil method and the resulting 0\ub0\u2013180\ub0 \u3b3 asymmetry with respect to the induced polarization direction was measured by two large-volume Ge detectors. The measured \u3b3 asymmetry of 3-\u3c3 significance, A\u3b3 = 8.4(2.7) \ub7 10 124, yields a matrix element of . This experimental result is c microscopic calculations based on the DDH \u201cbest value\u201d interaction for the nuclear weak Ha...