A ‘year-2001’ set of nuclear quadrupole moments, Q, is presented. Compared to the previous, ‘year-1992’ set, a major revision of the value or a considerable improvement of the accuracy is reported for 6 3Li, 7N, 19 9F (197 keV, I = 5/2), 11Na, 13Al, 21Sc, 22Ti, 26Fe (14 keV, I = 3/2 Mossbauer state), 31Ga, 32Ge, 77 34Se (250 keV, I = 5/2 state), 35Br, 36Kr, 37Rb, 39Y, 40Zr, 100 45Rh, 50Sn (24 keV, I = Mossbauer state), 53I, 54Xe, 55Cs and 83Bi.

Spectroscopic nuclear quadrupole moments

Deeply bound pionic states of heavy nuclei

A theoretical approach to pionic atoms and the problem of anomalies

Nuclear Data Sheets for A = 196

Nuclear Data Sheets for A=176

The absorption of stoppedπ− in181Ta and209Bi has been investigated by studying prompt and delayedγ-ray spectra. Absolute cross-sections for the yield of isotopes per capturedπ− in (π−, xn) reactions, as well as the relative probability of populating nuclear states of different spins have been measured for the hafnium and lead isotopes, respectively. A spin as high as 20 has been observed in the production of204Pb. The ground-state rotational bands of the hafnium isotopes are excited to spin values up to 16. Neutron multiplicities as large as 15 have been observed for both targets. A neutron multiplicity of ≃8 is most probable for both tantalum and bismuth targets.

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High spin states and neutron multiplicities after pion capture in181Ta and209Bi

Energies and widths of pionic 3d-2p transitions of30Zn,32Ge, and33As have been measured with a Ge detector. The values of the 2p shifts obtained from the measuremente2p(Zn)=7.0±1.4keV,e2p(Ge)=5.5±0.9keV, ande2p(As)=4.6±0.9keV show a decreasing behaviour for largeZ, which is caused by an increasings-wave contribution as predicted by theory.

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R. Guigas

Papers

High spin states and neutron multiplicities after pion capture in181Ta and209Bi

Measurement of thes-wave contribution to 2p-level shifts in pionic atoms

A modular NaI(Tl) detector for 20–1000 MeV photons☆

Precision determination of the difference of the charge radii of 16O and 18O