References - Bogoliubov Laboratory of Theoretical Physics - JINR

charge-exchange quasi-elastic differential cross-section for the reaction nd → p(nn) atthe
outgoing proton angle θp,Lab =0 ◦ to the elastic charge-exchange differential cross-section
np → pn, were carried out at the neutron beam kinetic energies of 0.55, 0.8, 1.0, 1.2, 1.4, 1.8
and 2.0 GeV . The obtained Rdp = dσ/dΩ(nd → p(nn))/dσ/dΩ(np → pn) results were
published in [9 - 10]. See also fig.2.
Analysis of the experimental Rdp results obtained
proves that this data can be used for the Delta-Sigma
experimental program to reduce the total ambiguity
in the extraction of the amplitude real parts.
The testing of the spectrometer elements and carrying
out of the Rdp measurements were a powerful
test for the future measurements of the spin correlation
parameters Aookk(np) andAoonn(np). These measurements
will be made using the same method and
the existing described spectrometer. We have gained
wide experience in carrying out such charge-exchange
measurements.
4. Readiness of the Dubna Polarized Proton
Target. The equipment (superconducting coils)
needed for the providing of T mode of target polarization
has been prepared and complex tests of coils
together with systems MPT were begun. But since
a middle of 2007 the financing of the MPT modernization
works was completely stopped. Works on
modernization of the Saclay-Argonne-JINR polarized
proton target (setup PPT) will be foreseen by the
new JINR theme 02-1-1097-2010/12 ”Study of Polarization
Phenomena and Spin Effects at the JINR
Nuclotron-M Facility”.
5. High Intensity Polarized Deuteron Beam
at the Nuclotron-M. A creation of new source of
polarized deuteron (SPD) ions [12] is foreseen now for
Figure 2: The Rdp energy dependence.
Black squares our data [9 - 10],
open squares and circles for the existing
data at energies below 1 GeV .The
open squares represent the Rdp data obtained
in the nd → p(nn) reaction measurements
and the open circles represent
the Rdp data obtained in either the
pd → n(pp)orthedp → (pp)n reactions
measurements. The curves represent
the energy behaviour of the Rdp calculated
using NN invariant amplitude
data sets from the energy-dependent
phase-shift analyses. The solid curves
are the calculations with the amplitude
data sets for the elastic np → pn
charge-exchange at θp,CM =0 ◦ :curve1
corresponds to the SP07 solution, curve
2toSP00,andcurve3toSM97. The
dotted curve represents the Rdp values
with the amplitudes data set for the
elastic np → np scattering at θn,CM = π
(for the SP07 solution).
the Nuclotron-M accelerator under the JINR theme 02-0-1065-2007/2009. The proposed
project of source assumes the development of a universal high-intensity source of polarized
deuterons (protons) using a charge-exchange plasma ionizer. The output current of the
source under design will be up to 10 mA for ↑ D + (↑ H + ) and polarization will be up to
90% of the maximal vector (-1) and tensor (+1, -2) polarization. The project is based on
the equipment which was supplied within the framework of an agreement between JINR
and IUCF (Bloomington, USA).
Recent status of the source for polarized deuteron creation is shown in [13]. The SPD
putting into operation is in the end of 2010.
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