Parity Non-conservation in the decay of Polarized 17/2 - isomers in 93 Tc. Weizmann Institute of Science, ISRAEL, GSI , Germany, NSCL , Michigan, USA. Parity doublet at 300 eV Proximity. Unique case For non-zero PNC. Only Few Cases 18 F 90 meV 19 F ~380(100) meV 21 Ne 30 meV
Parity Non-conservation in the decay of Polarized 17/2- isomers in 93Tc
Parity doublet at 300 eV
Proximity. Unique case
For non-zero PNC.
PNC in nuclei
93Tc High Spin Isomer: N=50,Well described by Shell model Wave Func.
45Sc(52Cr, 2p2n)93Tc Elab(93Tc) = 65 MeVChecked with Si-det.
M. Hass et al., PLB 371, 25, previous work at SHIP-GSI, RMS-LNL
Separates and Tranfers to
Focal Plane Area
TF technique for Polarization
2 mins. + 1sec
E-degrader 0.2 mg/cm2 to avoid foil stack damage.
0-180° Asmmetry (A) in the M2/E3() -decay due to E2 Componet
16 foils, @70º
Present+PLB, 371, 25:
A = 4.8 (2.1). 10-4 , <Hpnc>=0.34(14)(25) meV
Theory:1p1/2-0g9/2 withIV strength correction by an empirical factor of 0.15±0.15.
<Hpnc> = - 0.2 to 1 meV