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Title: Spin polarization of {sup 34}Al fragments produced by nucleon pickup at intermediate energies

Abstract

The polarization of {sup 34}Al fragments, produced by single neutron pickup from a {sup 9}Be target by a {sup 36}S projectile at 77.5 MeV/nucleon, have been observed at GANIL via the detection of resonantly destroyed {beta}-asymmetry. The reaction-induced polarization is deduced using a tentative spin/parity assignment for the {sup 34}Al ground state. A positive polarization was measured near the peak of the {sup 34}Al yield curve. A kinematical model based on the spectator-participant model for projectile fragmentation reactions has been extended in order to take into account the features of pickup reactions, i.e., the picked-up nucleon having an average momentum equal to the Fermi momentum and aligned along the incident beam direction. The trend-line in the observed spin-orientation is very well reproduced by this model.

Authors:
; ; ; ; ; ;  [1];  [2]; ;  [3]; ; ; ;  [4];  [5]
  1. Instituut voor Kern-en Stralingsfysica, K. U. Leuven, B-3001 Leuven (Belgium)
  2. Dipartimento di Fisica, Universita di Camerino, I-62032 Camerino (Italy)
  3. CEA/DIF/DPTA/PN, BP 12, F-91680 Bruyeres le Chatel (France)
  4. GANIL, BP 55027, F-14076 Caen Cedex 5 (France)
  5. FLNR-JINR, Department of Physics, RU-141980 Dubna (Russian Federation)
Publication Date:
OSTI Identifier:
20771439
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 73; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevC.73.044313; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALUMINIUM 34; ASYMMETRY; BERYLLIUM 9; GANIL CYCLOTRON; GROUND STATES; HEAVY ION REACTIONS; MEV RANGE; NEUTRONS; NUCLEAR FRAGMENTATION; NUCLEAR REACTION YIELD; PARITY; PICKUP REACTIONS; POLARIZATION; SCATTERING; SPIN; SPIN ORIENTATION

Citation Formats

Turzo, K, Himpe, P, Borremans, D, Mallion, S, Neyens, G, Vermeulen, N, Yordanov, D, Balabanski, D L, Belier, G, Daugas, J M, Georgiev, G, Oliveira de Santos, F, Matea, I, Stodel, Ch, and Penionzhkevich, Yu E. Spin polarization of {sup 34}Al fragments produced by nucleon pickup at intermediate energies. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.044313.
Turzo, K, Himpe, P, Borremans, D, Mallion, S, Neyens, G, Vermeulen, N, Yordanov, D, Balabanski, D L, Belier, G, Daugas, J M, Georgiev, G, Oliveira de Santos, F, Matea, I, Stodel, Ch, & Penionzhkevich, Yu E. Spin polarization of {sup 34}Al fragments produced by nucleon pickup at intermediate energies. United States. https://doi.org/10.1103/PhysRevC.73.044313
Turzo, K, Himpe, P, Borremans, D, Mallion, S, Neyens, G, Vermeulen, N, Yordanov, D, Balabanski, D L, Belier, G, Daugas, J M, Georgiev, G, Oliveira de Santos, F, Matea, I, Stodel, Ch, and Penionzhkevich, Yu E. 2006. "Spin polarization of {sup 34}Al fragments produced by nucleon pickup at intermediate energies". United States. https://doi.org/10.1103/PhysRevC.73.044313.
@article{osti_20771439,
title = {Spin polarization of {sup 34}Al fragments produced by nucleon pickup at intermediate energies},
author = {Turzo, K and Himpe, P and Borremans, D and Mallion, S and Neyens, G and Vermeulen, N and Yordanov, D and Balabanski, D L and Belier, G and Daugas, J M and Georgiev, G and Oliveira de Santos, F and Matea, I and Stodel, Ch and Penionzhkevich, Yu E},
abstractNote = {The polarization of {sup 34}Al fragments, produced by single neutron pickup from a {sup 9}Be target by a {sup 36}S projectile at 77.5 MeV/nucleon, have been observed at GANIL via the detection of resonantly destroyed {beta}-asymmetry. The reaction-induced polarization is deduced using a tentative spin/parity assignment for the {sup 34}Al ground state. A positive polarization was measured near the peak of the {sup 34}Al yield curve. A kinematical model based on the spectator-participant model for projectile fragmentation reactions has been extended in order to take into account the features of pickup reactions, i.e., the picked-up nucleon having an average momentum equal to the Fermi momentum and aligned along the incident beam direction. The trend-line in the observed spin-orientation is very well reproduced by this model.},
doi = {10.1103/PhysRevC.73.044313},
url = {https://www.osti.gov/biblio/20771439}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 4,
volume = 73,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2006},
month = {Sat Apr 15 00:00:00 EDT 2006}
}