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Title: PRISMA Spectrometer EVR Spectra And Collection Efficiencies In Gas-Filled Mode

Abstract

In order to study nuclear fusion reaction, the heavy-ion magnetic spectrometer PRISMA installed at INFN Legnaro is planned to be modified to work in Gas-Filled Mode. For that purpose, the possible response of the spectrometer will be examined in Rutherford scattering experiments which simulate the fusion reaction products. predictions for the evaporation residue (EVR) position spectra and collection efficiencies, as well as the respective spectrometer set ups, as determined using the algorithm of ANAMARI code, are presented.

Authors:
; ;  [1];  [2];  [3]
  1. Institute of Nuclear Sciences VINCA, PO Box 522, 11001 Belgrade (Serbia and Montenegro)
  2. Universita di Padova, Padova (Italy)
  3. (Italy)
Publication Date:
OSTI Identifier:
21057191
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 899; Journal Issue: 1; Conference: 6. international conference of the Balkan Physical Union, Istanbul (Turkey), 22-26 Aug 2006; Other Information: DOI: 10.1063/1.2733273; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; A CODES; ALGORITHMS; EFFICIENCY; ENERGY SPECTRA; EVAPORATION MODEL; HEAVY ION FUSION REACTIONS; MAGNETIC SPECTROMETERS; MONTE CARLO METHOD; NUCLEAR FRAGMENTATION; NUCLEAR FRAGMENTS; RUTHERFORD SCATTERING

Citation Formats

Dragosavac, D. R., Ujic, P. N., Subotic, K. M., Scarlassara, F., and INFN Sezione di Padova, Padova. PRISMA Spectrometer EVR Spectra And Collection Efficiencies In Gas-Filled Mode. United States: N. p., 2007. Web. doi:10.1063/1.2733273.
Dragosavac, D. R., Ujic, P. N., Subotic, K. M., Scarlassara, F., & INFN Sezione di Padova, Padova. PRISMA Spectrometer EVR Spectra And Collection Efficiencies In Gas-Filled Mode. United States. doi:10.1063/1.2733273.
Dragosavac, D. R., Ujic, P. N., Subotic, K. M., Scarlassara, F., and INFN Sezione di Padova, Padova. Mon . "PRISMA Spectrometer EVR Spectra And Collection Efficiencies In Gas-Filled Mode". United States. doi:10.1063/1.2733273.
@article{osti_21057191,
title = {PRISMA Spectrometer EVR Spectra And Collection Efficiencies In Gas-Filled Mode},
author = {Dragosavac, D. R. and Ujic, P. N. and Subotic, K. M. and Scarlassara, F. and INFN Sezione di Padova, Padova},
abstractNote = {In order to study nuclear fusion reaction, the heavy-ion magnetic spectrometer PRISMA installed at INFN Legnaro is planned to be modified to work in Gas-Filled Mode. For that purpose, the possible response of the spectrometer will be examined in Rutherford scattering experiments which simulate the fusion reaction products. predictions for the evaporation residue (EVR) position spectra and collection efficiencies, as well as the respective spectrometer set ups, as determined using the algorithm of ANAMARI code, are presented.},
doi = {10.1063/1.2733273},
journal = {AIP Conference Proceedings},
number = 1,
volume = 899,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}
  • For calculation of gaseous ion-molecule reaction cross sections from mass spectrometer data, the collection efficiencies for the primary and secondary ions must be known. A method for determining the discrimination among ions of different m/e is given in which the ratio of the analyzed ion current to the total saturation current is compared for various m/e values. Data were collected for H/sub 2/, D/sub 2/, CH/sub 4/, CD/sub 4/, Ne, C/sub 2/H/sub 2/, H/sub 2/S, Ar, Kr, and Xe gases and no rmalized to unity for xenon. There is little discrimination for any repeller field except for a small increasemore » at low m/e. (D.L.C.)« less
  • The performance of the AGATA Demonstrator Array coupled to the PRISMA magnetic spectrometer have been evaluated in a consistent way using detailed Monte Carlo simulations of the two devices. Results for the {sup 90}Zr+{sup 208}Pb at 560 MeV reaction are presented and discussed here, proving that the Doppler correction capabilities of the AGATA+PRISMA setup will be very close to the intrinsic energy resolution of the germanium detectors.
  • The large solid angle magnetic spectrometer for heavy ions PRISMA was operated at LNL in conjunction with the highly efficient CLARA set-up up to the end of March 2008. The AGATA Demonstrator is being mounted around the target area of PRISMA replacing the CLARA set-up. It will allow to carry out nuclear structure and reaction mechanism studies with better resolution and higher statistics. New detectors for light ions and slow moving heavy ions have been designed for the focal plane of the spectrometer.
  • Multinucleon transfer reaction {sup 40}Ar+{sup 208}Pb has been investigated with the PRISMA-CLARA experimental setup in LNL, INFN, Italy. The experimental differential cross sections have been obtained for different transfer channels by measuring more than {Delta}{theta}{sub lab} = 20 Degree-Sign covered by three angular settings of PRISMA. Results have been compared with the semiclassical calculation GRAZING. Since the understanding of the reaction mechanism depends strongly on the determination of absolute cross section, effect of transport of ions through PRISMA has been studied via a Monte Carlo simulation code.
  • Hybrid recoil mass analyzer (HYRA) is a unique, dual-mode spectrometer designed to carry out nuclear reaction and structure studies in heavy and medium-mass nuclei using gas-filled and vacuum modes, respectively and has the potential to address newer domains in nuclear physics accessible using high energy, heavy-ion beams from superconducting LINAC accelerator (being commissioned) and ECR-based high current injector system (planned) at IUAC. The first stage of HYRA is operational and initial experiments have been carried out using gas-filled mode for the detection of heavy evaporation residues and heavy quasielastic recoils in the direction of primary beam. Excellent primary beam rejectionmore » and transmission efficiency (comparable with other gas-filled separators) have been achieved using a smaller focal plane detection system. There are plans to couple HYRA to other detector arrays such as Indian national gamma array (INGA) and 4 spin spectrometer for ER tagged spectroscopic/spin distribution studies and for focal plane decay measurements.« less