Search for parity and time reversal violations in hindered gamma-decay

We discuss various possibilities to improve the sensitivity of parity and time reversal asymmetry measurements in gamma decaying nuclei. We compare the best known parity violating case^180mHf to a similar isotope^178mHf. Although the parity violation may not be as large, the 178 isomer is better suited to eliminate experimental systematic problems. We introduce a new detector to enhance the sensitivity of such measurements. Our first experiments indicate applicability of these detectors to P symmetry tests.