STUDY OF EXOTIC WEAKLY BOUND NUCLEI USING MAGNETIC ANALYZER MAVR

21st International School on Nuclear Physics and Applications & International Symposium on Exotic Nuclei

Maslov, V.A.^1,2 ; Kazacha, V.I.^1 ; Kolesov, I.V.^1 ; Lukyanov, S.M.^1 ; Melnikov, V.N.^1 ; Osipov, N.F.^1 ; Penionzhkevich, Yu.E.^1,3 ; Skobelev, N.K.^1 ; Sobolev, Yu.G.^1,2 ; Voskoboinik, E.I.^1

Joint Institute for Nuclear Research, Moscow Region, Dubna, Russia^1

NRC Kurchatov Institute, Moscow, Russia^2

Federal Research Nuclear University MEPhl, Moscow, Russia^3

关键词: Absolute accuracy;    Detecting systems;    Momentum resolutions;    Particle trajectories;    Radioactive nuclei;    Separation and identification;    Total kinetic energy;    Weakly bound nucleus;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/724/1/012033/pdf
DOI  :  10.1088/1742-6596/724/1/012033

来源: IOP

【 摘 要 】

A project of the high-resolution magnetic analyzer MAVR is proposed. The analyzer will comprise new magnetic optical and detecting systems for separation and identification of reaction products in a wide range of masses (5-150) and charges (1-60). The magnetic optical system consists of the MSP-144 magnet and a doublet of quadrupole lenses. This will allow the solid angle of the spectrometer to be increased by an order of magnitude up to 30 msr. The magnetic analyzer will have a high momentum resolution (10-4) and high focal-plane dispersion (1.9 m). It will allow products of nuclear reactions at energies up to 30 MeV/nucleon to be detected with the charge resolution ∼1/60. Implementation of the project is divided into two stages: conversion of the magnetic analyzer proper and construction of the nuclear reaction products identification system. The MULTI detecting system is being developed for the MAVR magnetic analyzer to allow detection of nuclear reaction products and their identification by charge Q, atomic number Z, and mass A with a high absolute accuracy. The identification will be performed by measuring the energy loss (ΔE), time of flight (TOF), and total kinetic energy (TKE) of reaction products. The particle trajectories in the analyzer will also be determined using the drift chamber developed jointly with GANIL. The MAVR analyzer will operate in both primary beams of heavy ions and beams of radioactive nuclei produced by the U400 - U400M acceleration complex. It will also be used for measuring energy spectra of nuclear reaction products and as an energy monochromator.