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Title: {sup 49}Cr: Towards full spectroscopy up to 4 MeV

Abstract

The nucleus {sup 49}Cr has been studied by analyzing {gamma}-{gamma} coincidences in the reaction {sup 46}Ti({alpha},n){sup 49}Cr at the bombarding energy of 12 MeV. The level scheme has been greatly extended at low excitation energy, and several lifetimes have been determined by means of the Doppler shift attenuation method. Shell model calculations in the full pf configuration space reproduce well the negative parity levels. Satisfactory agreement is obtained for positive parity levels by extending the configuration space to include a nucleon-hole in either the 1d{sub 3/2} or 2s{sub 1/2} orbitals. A nearly one-to-one correspondence is found between experimental and theoretical levels up to an excitation energy of 4 MeV. Experimental data and shell model calculations are interpreted in terms of the Nilsson diagram and the particle-rotor model, showing the strongly coupled nature of the bands in this prolate nucleus. Nine values of K{sup {pi}} are proposed for the levels observed in this experiment. As a secondary result, it is shown that the values of the experimental magnetic moments in 1f{sub 7/2} nuclei are well reproduced without quenching the nucleon g factors.

Authors:
; ; ;  [1];  [2]; ; ;  [3];  [4]; ; ; ; ;  [5]
  1. Dipartimento di Fisica dell'Universita and INFN, Sezione di Padova, Padova (Italy)
  2. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo (Brazil)
  3. Laboratori Nazionali di Legnaro-INFN, Legnaro (Italy)
  4. Departamento de Fisica Teorica, Universidad Autonoma, Cantoblanco, Madrid (Spain)
  5. Institut fuer Kernphysik der Universitaet zu Koeln (Germany)
Publication Date:
OSTI Identifier:
20771264
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.73.024313; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA REACTIONS; CHROMIUM 49; COLLECTIVE MODEL; DSA METHOD; ENERGY LEVELS; EXCITATION; LANDE FACTOR; LIFETIME; MEV RANGE; NEUTRONS; NUCLEAR MAGNETIC MOMENTS; PARITY; PARTICLE-CORE COUPLING MODEL; SHELL MODELS; TITANIUM 46 TARGET

Citation Formats

Brandolini, F., Menegazzo, R., Pavan, P., Lenzi, S., Ribas, R.V., Axiotis, M., De Poli, M., Napoli, D., Sanchez-Solano, J., Dewald, A., Fitzler, A., Jessen, K., Kasemann, S., and Brentano, P. von. {sup 49}Cr: Towards full spectroscopy up to 4 MeV. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.024313.
Brandolini, F., Menegazzo, R., Pavan, P., Lenzi, S., Ribas, R.V., Axiotis, M., De Poli, M., Napoli, D., Sanchez-Solano, J., Dewald, A., Fitzler, A., Jessen, K., Kasemann, S., & Brentano, P. von. {sup 49}Cr: Towards full spectroscopy up to 4 MeV. United States. doi:10.1103/PhysRevC.73.024313.
Brandolini, F., Menegazzo, R., Pavan, P., Lenzi, S., Ribas, R.V., Axiotis, M., De Poli, M., Napoli, D., Sanchez-Solano, J., Dewald, A., Fitzler, A., Jessen, K., Kasemann, S., and Brentano, P. von. Wed . "{sup 49}Cr: Towards full spectroscopy up to 4 MeV". United States. doi:10.1103/PhysRevC.73.024313.
@article{osti_20771264,
title = {{sup 49}Cr: Towards full spectroscopy up to 4 MeV},
author = {Brandolini, F. and Menegazzo, R. and Pavan, P. and Lenzi, S. and Ribas, R.V. and Axiotis, M. and De Poli, M. and Napoli, D. and Sanchez-Solano, J. and Dewald, A. and Fitzler, A. and Jessen, K. and Kasemann, S. and Brentano, P. von},
abstractNote = {The nucleus {sup 49}Cr has been studied by analyzing {gamma}-{gamma} coincidences in the reaction {sup 46}Ti({alpha},n){sup 49}Cr at the bombarding energy of 12 MeV. The level scheme has been greatly extended at low excitation energy, and several lifetimes have been determined by means of the Doppler shift attenuation method. Shell model calculations in the full pf configuration space reproduce well the negative parity levels. Satisfactory agreement is obtained for positive parity levels by extending the configuration space to include a nucleon-hole in either the 1d{sub 3/2} or 2s{sub 1/2} orbitals. A nearly one-to-one correspondence is found between experimental and theoretical levels up to an excitation energy of 4 MeV. Experimental data and shell model calculations are interpreted in terms of the Nilsson diagram and the particle-rotor model, showing the strongly coupled nature of the bands in this prolate nucleus. Nine values of K{sup {pi}} are proposed for the levels observed in this experiment. As a secondary result, it is shown that the values of the experimental magnetic moments in 1f{sub 7/2} nuclei are well reproduced without quenching the nucleon g factors.},
doi = {10.1103/PhysRevC.73.024313},
journal = {Physical Review. C, Nuclear Physics},
number = 2,
volume = 73,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}