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Title: The PRISMA-CLARA setup: experimental results and future plans

Abstract

The PRISMA-CLARA setup, consisting of the large solid angle magnetic spectrometer for heavy-ions PRISMA coupled to the highly efficient CLARA array of 25 Clovers detectors, was operating at LNL since the end of 2003. The first experimental campaign has been completed at the end of 2004. Selected results on the structure of moderately neutron-rich nuclei, populated in multi-nucleon transfer and deep-inelastic reactions, are presented here. Some technical developments related to the setup are also discussed.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1] more »;  [2];  [2];  [2];  [2];  [3];  [2];  [4] « less
  1. INFN -- Laboratori Nazionali di Legnaro, Viale dell'Universita, 2, Legnaro (PD), 35020 (Italy)
  2. (Italy)
  3. (Croatia)
  4. (Italy) (and others)
Publication Date:
OSTI Identifier:
21061826
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 912; Journal Issue: 1; Conference: International symposium on exotic nuclei, Khanty-Mansiysk (Russian Federation), 17-22 Jul 2006; Other Information: DOI: 10.1063/1.2746618; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA). PRISMA Collaboration; CLARA Collaboration
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; DEEP INELASTIC HEAVY ION REACTIONS; DEEP INELASTIC SCATTERING; HEAVY IONS; MAGNETIC SPECTROMETERS; MANY-NUCLEON TRANSFER REACTIONS; NEUTRON-RICH ISOTOPES; NEUTRONS; NUCLEI

Citation Formats

Fioretto, E., Corradi, L., De Angelis, G., Della Vedova, F., Gadea, A., Marginean, N., Guiot, B., Napoli, D. R., Pokrovskiy, I., Stefanini, A. M., Orlandi, R., Sahin, E., Valiente-Dobon, J. J., Bazzacco, D., Beghini, S., Farnea, E., Lenzi, S. M., Lunardi, S., Mason, P., Montagnoli, G., Dipartimento di Fisica dell'Universita, Via Marzolo 4, Padova, 35131, INFN Sezione di Padova, Via Marzolo 4, Padova, 35131, Dipartimento di Fisica dell'Universita, Via Cintia, Napoli, 80126, INFN Sezione di Napoli, Via Cintia, Napoli, 80126, R. Boskovic Institute, Bijenicka c. 54 HR-10001 Zagreb, Dipartimento di Fisica dell'Universita, Via P. Giuria 1 Torino, 10125, and INFN Sezione di Torino, Via P. Giuria 1 Torino, 10125. The PRISMA-CLARA setup: experimental results and future plans. United States: N. p., 2007. Web. doi:10.1063/1.2746618.
Fioretto, E., Corradi, L., De Angelis, G., Della Vedova, F., Gadea, A., Marginean, N., Guiot, B., Napoli, D. R., Pokrovskiy, I., Stefanini, A. M., Orlandi, R., Sahin, E., Valiente-Dobon, J. J., Bazzacco, D., Beghini, S., Farnea, E., Lenzi, S. M., Lunardi, S., Mason, P., Montagnoli, G., Dipartimento di Fisica dell'Universita, Via Marzolo 4, Padova, 35131, INFN Sezione di Padova, Via Marzolo 4, Padova, 35131, Dipartimento di Fisica dell'Universita, Via Cintia, Napoli, 80126, INFN Sezione di Napoli, Via Cintia, Napoli, 80126, R. Boskovic Institute, Bijenicka c. 54 HR-10001 Zagreb, Dipartimento di Fisica dell'Universita, Via P. Giuria 1 Torino, 10125, & INFN Sezione di Torino, Via P. Giuria 1 Torino, 10125. The PRISMA-CLARA setup: experimental results and future plans. United States. doi:10.1063/1.2746618.
Fioretto, E., Corradi, L., De Angelis, G., Della Vedova, F., Gadea, A., Marginean, N., Guiot, B., Napoli, D. R., Pokrovskiy, I., Stefanini, A. M., Orlandi, R., Sahin, E., Valiente-Dobon, J. J., Bazzacco, D., Beghini, S., Farnea, E., Lenzi, S. M., Lunardi, S., Mason, P., Montagnoli, G., Dipartimento di Fisica dell'Universita, Via Marzolo 4, Padova, 35131, INFN Sezione di Padova, Via Marzolo 4, Padova, 35131, Dipartimento di Fisica dell'Universita, Via Cintia, Napoli, 80126, INFN Sezione di Napoli, Via Cintia, Napoli, 80126, R. Boskovic Institute, Bijenicka c. 54 HR-10001 Zagreb, Dipartimento di Fisica dell'Universita, Via P. Giuria 1 Torino, 10125, and INFN Sezione di Torino, Via P. Giuria 1 Torino, 10125. Tue . "The PRISMA-CLARA setup: experimental results and future plans". United States. doi:10.1063/1.2746618.
@article{osti_21061826,
title = {The PRISMA-CLARA setup: experimental results and future plans},
author = {Fioretto, E. and Corradi, L. and De Angelis, G. and Della Vedova, F. and Gadea, A. and Marginean, N. and Guiot, B. and Napoli, D. R. and Pokrovskiy, I. and Stefanini, A. M. and Orlandi, R. and Sahin, E. and Valiente-Dobon, J. J. and Bazzacco, D. and Beghini, S. and Farnea, E. and Lenzi, S. M. and Lunardi, S. and Mason, P. and Montagnoli, G. and Dipartimento di Fisica dell'Universita, Via Marzolo 4, Padova, 35131 and INFN Sezione di Padova, Via Marzolo 4, Padova, 35131 and Dipartimento di Fisica dell'Universita, Via Cintia, Napoli, 80126 and INFN Sezione di Napoli, Via Cintia, Napoli, 80126 and R. Boskovic Institute, Bijenicka c. 54 HR-10001 Zagreb and Dipartimento di Fisica dell'Universita, Via P. Giuria 1 Torino, 10125 and INFN Sezione di Torino, Via P. Giuria 1 Torino, 10125},
abstractNote = {The PRISMA-CLARA setup, consisting of the large solid angle magnetic spectrometer for heavy-ions PRISMA coupled to the highly efficient CLARA array of 25 Clovers detectors, was operating at LNL since the end of 2003. The first experimental campaign has been completed at the end of 2004. Selected results on the structure of moderately neutron-rich nuclei, populated in multi-nucleon transfer and deep-inelastic reactions, are presented here. Some technical developments related to the setup are also discussed.},
doi = {10.1063/1.2746618},
journal = {AIP Conference Proceedings},
number = 1,
volume = 912,
place = {United States},
year = {Tue May 22 00:00:00 EDT 2007},
month = {Tue May 22 00:00:00 EDT 2007}
}
  • Deep-inelastic and multi-nucleon transfer reactions can be used to populate nuclei with relatively large neutron excess. Recently, at the Laboratori Nazionali di Legnaro, a setup consisting on an efficient {gamma}-ray detection system CLARA coupled to the large acceptance magnetic spectrometer PRISMA, capable of tracking the trajectories of the reaction products, has been assembled. During the first year of activity, the experiments performed with the CLARA-PRISMA setup, have been focused mainly on the nuclear structure of neutron-rich nuclei. In particular, nuclei around N=20, N=50 and lying in the A{approx}60 transitional region with N<40, have been investigated. In this contribution, results ofmore » these experiments will be reported.« less
  • A program on nuclear structure studies in nuclei populated by multi-nucleon transfer and deep-inelastic collisions is being carried on at LNL with the PRISMA/CLARA setup. The large acceptance of the spectrometer PRISMA allows to detect nuclear species produced over a wide mass and Z range. Prompt gamma rays following the de-excitation of these nuclei can be observed with the CLARA array. The high granularity of CLARA, combined with velocity vector measured with PRISMA, allows precise Doppler correction for the gamma rays emitted by in-flight recoils. Typical gamma-ray energy resolution obtained after Doppler correction is below 1% for recoil velocities v/c{approx}10%.more » Having high efficiency and good resolving power, PRISMA/CLARA is an ideal tool for reaction mechanisms studies and for gamma spectroscopy of the nuclei produced in multi-nucleon transfer reactions or deep-inelastic collisions. Following a recent campaign dedicated to the study of medium-mass neutron-rich nuclei, significant experimental information has been obtained, concerning topics as the island of inversion around N=20, the onset of deformation on Cr-Fe region around N=40, and the stability of N=50 spherical shell-closure for 28<Z<40.« less
  • The CLARA-PRISMA setup is a powerful tool for spectroscopic studies of neutron-rich nuclei produced in multi-nucleon transfer and deep-inelastic reactions. It combines the large acceptance spectrometer PRISMA with the {gamma}-ray array CLARA. At present, the ancillary heavy-ion detector DANTE, based on Micro-Channel Plates to be installed at the CLARA-PRISMA setup, is being constructed at LNL. DANTE will open the possibility of measuring {gamma}-{gamma} Doppler-corrected coincidences for the events outside the acceptance of PRISMA. In this presentation, it is described the heavy-ion detector DANTE, as well as the performances of the first prototype.
  • Since the discovery of the breakdown of shell effects in very neutron-rich N=20 and 28 nuclei, studies of the properties of nuclei far from stability have been of intense interest since they provide a unique opportunity to increase our understanding of nuclear interactions in extreme conditions and often challenge our theoretical models.Deep-inelastic processes can be used to populated high spin states of neutron-rich nuclei. In the deep-inelastic processes, an equilibration in N/Z between the target and projectile nuclei is achieved. For most heavy neutron-rich target nuclei, the N/Z ratio is 1.5 - 1.6, while for the possible neutron-rich sdf-shell projectilemore » it is about 1.2. Thus by using deep-inelastic processes one can populate neutron-rich nuclei around N=20 and N=28.New results for the spectroscopy of neutron-rich N=22 36Si and 37P are presented here.« less
  • The lifetimes of the first excited states of nuclei around the doubly-magic nucleus {sup 48}Ca have been determined using a novel method that combines the Recoil Distance Doppler Shift (RDDS) method with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This novel method and some preliminary results on lifetimes are presented.