R.J. Slobodrian

Neutron-neutron scattering length from a comparison of the 2H(p,n) 2p and 2H(n,p) 2n reactions☆

Abstract A study of the reaction 2 H(p,n)2p is reported which resolves the discrepancy among the values of the 1 S 0 n-n scattering length deduced from the reaction 2 H(n,p)2n. Our value a n = −16.7 +2.6 −3.0 fm is consistent with results from the 2 H(π − , 2n)γ and 3 H(d, 3 He)2n reactions.

The ^2p final-state interaction in the ^3He(^3He, ɑ)2p reaction

The angular variation of the α-particle spectra from the reaction has been measured at 43.7 MeV and 53.0 MeV laboratory energy. The energy spectra show a prominent peak at the high-energy end and its angular distributions exhibit a pronounced diffraction pattern. Good fits to the spectra are obtained with the Watson-Migdal final-state formalism using the known p-p scattering parameters.

A search for excited states of 3He

The ^3He+^3He interaction does not excite sharp states of ^3He with a cross section larger than 120 μb · sr^(−1) below 30 MeV excitation.

Possible observation of vacuum polarization effects in the 1S0 p-p state☆

Abstract The effects of vacuum polarization on the “line shape” of the 1 S 0 p-p state are calculated and shown to be measurable with present experimental techniques.

Observation of the 3He(p, n) 3p reaction at 25 MeV

Abstract The neutron energy spectrum from the reaction 3 He(p, n) 3p has been measured at a laboratory angle of 8° for a proton bombarding energy of 24.9 MeV. A deviation of the spectrum shape from the prediction for four-body phase space has been observed.

The 3He(3He, t)3p reaction at 44 MeV

Triton spectra from the reaction ^3He(^3He,t)3p have been measured at a bombarding energy of 44 MeV for lab angles between 6° and 25°. These spectra are quite featureless and show no indication of either a 3p final-state interaction or of a strong sequential decay mode.

SCATTERING OF POLARIZED PROTONS BY DEUTERIUM IN THE ENERGY REGION 10 TO 20 MeV.

Abstract The polarization of protons elastically scattered from deuterium has been measured at four energies between 10 and 20 MeV incident proton energy. The asymmetry is seen to become negative for large angles at 19.1 MeV and for small angles at 11.0 and 13.2 MeV.

Small-angle behaviour of the polarization in p-d elastic scattering

Abstract Measurements of the polarization in p-d scattering at 11.6 MeV show a minimum in the asymmetry distribution at 29° c.m. This observation seems to be consistent with spin-orbit effects in the p-d interaction at this energy.