Lett.Nuovo Cim.

Nucl.Instrum.Meth.

The advantage is discussed of using the deuteron beam for studying dp reactions. The system of data analysis in the dp experiment at 3.3 GeV/ c is described. The cross sections for the most frequent channels are presented.

Nucl. Phys. B

The differential cross section (d σ /d t ) for the dp → ppn charge retention reaction at 3.3 GeV/ c deuteron momentum is studied and compared with the Glauber multiple scattering theory. Within the limits of the uncertainties of the existing elementary nucleon-nucleon data, the simple Glauber model calculations give, in general, a fair agreement with experiment, except for the low | t | region where possible spin effects may play a role.

Nucl.Phys.B

The dp → nnp π + , dp → ppn π 0 and dp → ppp π - reactions at 3.33 GeV/ c deuteron momentum on the proton target were studied in order to search for a ΔΔ configuration in the deuteron. The frequent backward emission of the (p π + ), (n π o ) and (p π − ) systems in the deuteron rest frame was observed. The origin of the effect was analysed from the point of view of a possible ΔΔ admixture in the deuteron wave function. Some other sources which may contribute to the signal are indicated.

Nucl.Phys.B

The charge exchange deuteron break up dp→npp was studied at 3.33GeV/ c deuteron momentum in the 1 m hydrogen bubble chamber. The contribution of the spin-independent amplitude to the np→pn charge exchange reaction for low t values was estimated. Various mechanisms playing a role in the process considered are discussed.

Teor. Mat. Fiz.

Nucl. Phys. A

The absolute yields of prompt and delayed fission induced by negative muons in 232 Th, 238 U and 235 U have been measured. The delayed fission yields are much lower than could be predicted from Γ n / Γ f systematics for 15–20 MeV nuclear excitation. The systematics of prompt fission yields are compared with recently obtained photofission data. It is suggested that prompt fission can be used for investigating the channel structure of the fission barrier.

Phys. Lett. B

The absolute yields for prompt and delayed fission induced by negative muons in 237 Np, 239 Pu and 242 Pu have been measured and compared with photofission data.

Phys. Lett. B

Energy shifts of the electronic K X-rays of heavy muonic atoms have been observed. Natural metallic targets of Ta, Ir, Pb, Th and U were used. The shifts amounts to a few hundreds eV. This effect may give rise to a better understanding of muon cascade dynamics.

Nucl. Instrum. Meth.

The self-shunted streamer chambers can be used as visualizers of particle tracks and as detectors of event vertices. We discuss the operating conditions of this type of chamber in the presence of a magnetic field, and the features of the hv-pulse generator connected to the chamber. The results in the precision which can be obtained in the reconstruction of the tracks are discussed.

Nucl.Instrum.Meth.

A helium-filled self-shunted streamer chamber with various admixtures (Ne, Xe, H 2 , CH 4 , H 2 O, α-pinene) is described. The operating conditions have been investigated. A qualitative explanation is presented for the mechanism of the track localization.

J.Phys.G

The experimental polar angle distribution of the spectator nucleon in the dp to pnp reaction is studied in different intervals of the spectator momentum and four-momentum transfer. The results are compared with those from the impulse model calculations which take account of the ambiguity in the spectator particle identification. Agreement between the calculations and experiment is observed. The final state interaction of two nucleons is also considered.