Energy available for the double beta-decay of 76Ge

The Manitoba II high-resolution mass spectrometer has been used to determine the atomic mass difference ${}^{76}\text{Ge}\text{?}{}^{76}\text{Se}\text{= 2040.71 ± 0.52}\text{keV}$. This result, which is superior in precision and accuracy to previous values, should facilitate current searches for the neutrinoless double beta-decay of ⁷⁶Ge.     

Observation of a structural transition from cubic to monoclinic in UMn2

X-ray and neutron experiments have established that UMn₂ distorts from cubic to monoclinic at 211.7 K. No evidence for magnetic ordering has been found. The β angle (90° in cubic phase) becomes 94.9° at 5 K, and large strain effects and an internal rearrangement of the uranium atoms occur. We propose that the transition is caused by the formation of strong 5f bonds.     

Multiplicity distributions and double-scattering effects in π−d interactions at 360 GeV/c

Double-scattering effects are studied in π^?d interactions at 360 GeV/c. The partial cross sections $\text{σ}{}_{\mathrm{<mtext>N</mtext>}}\text{(π}{}^{\mathrm{?}}\text{d}\text{), σ}{}_{\mathrm{<mtext>N</mtext>}}\text{(“π}{}^{\mathrm{?}}\text{p}\text{”)}\text{and}\text{σ}{}_{\mathrm{<mtext>N</mtext>}}\text{(“π}{}^{\mathrm{?}}\text{n}\text{”)}$ are presented. The double-scattering probability per πd collision is found to be $\text{? = 0.15 ± 0.02}$. We have extracted the partial cross section X_N of the double-scattering plus interference contributions, and find that X_N obeys KNO scaling. The data are compared with various theoretical predictions.     

Fermi surface topology and the superconducting gap function in UPd2Al3: a neutron spin-echo study

We report on a single crystal neutron spin-echo investigation of the low-energy dynamic response in the heavy-fermion superconductor UPd2Al3 in the vicinity of the antiferromagnetic wave vector Q(0)=(0 0 0.5). Well inside the superconducting phase, antiferromagnetic quasielastic scattering, which is present in the normal state, is absent for relaxation times up to 10 ns, equivalent to an energy resolution of approximately 1 microeV. This places strong constraints on possible models for this magnetic superconductor.